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Original Article

Comparison of Magnetic Resonance Imaging and Ultrasonography in Staging Early Prostate Cancer — Results of a Multi-Institutional Cooperative Trial

Matthew D. Rifkin, M.D., Elias A. Zerhouni, M.D., Constantine A. Gatsonis, Ph.D., Leslie E. Quint, M.D., David M. Paushter, M.D., Jonathan I. Epstein, M.D., Ulrike Hamper, M.D., Patrick C. Walsh, M.D., and Barbara J. McNeil, M.D., Ph.D.

N Engl J Med 1990; 323:621-626September 6, 1990

Abstract
Abstract

Background.

In 1987, a cooperative study group consisting of five institutions was formed to determine the relative benefits of magnetic resonance imaging (MRI) and endorectal (transrectal) ultrasonography in evaluating patients with clinically localized prostate cancer (stage Ta or Tb).

Methods.

Over a period of 15 months, 230 patients were entered into the study and evaluated with identical imaging techniques. We compared imaging results with information obtained at the time of surgery and on pathological analysis.

Results.

MRI correctly staged 77 percent of cases of advanced disease and 57 percent of cases of localized disease; the corresponding figures for ultrasonography were 66 and 46 percent (P not significant). These figures did not vary significantly between readers; moreover, simultaneous interpretation of MRI and ultrasound scans did not improve accuracy. In terms of detecting and localizing lesions, MRI identified only 60 percent of all malignant tumors measuring more than 5 mm on pathological analysis and ultrasonography identified only 59 percent.

Conclusions.

The MRI and ultrasonography equipment that is currently available is not highly accurate in staging early prostate cancer, mainly because neither technique has the ability to identify microscopic spread of disease. Further evaluation with improved equipment may improve the accuracy of these techniques. (N Engl J Med 1990; 323:621–6.)

Media in This Article

Table 1Sensitivity and Specificity of Ultrasonography in Staging Operable Prostate Cancer in 219 Patients.*
Table 2Sensitivity and Specificity of MRI in Staging Operable Prostate Cancer in 194 Patients.*
Article

PROSTATE cancer is the most prevalent cancer in men, the most frequently diagnosed cancer, and the second most frequent cause of death due to cancer in American men.1 2 3 The approach to treatment varies and is dependent on the extent of cancer at the time of diagnosis. Although new imaging techniques have been developed over the past 10 to 20 years to increase staging accuracy and thereby lead to better treatment decisions, the increasing need for cost containment has raised questions about the value of these approaches.

Computed tomography was initially used to stage prostate cancer,4 5 6 but since it cannot identify intrinsic prostate disease, it has been replaced by endorectal, or transrectal, ultrasonography for diagnosis and localized staging6 7 8 9 and, in many institutions, by magnetic resonance imaging (MRI) for staging.10 11 12 13 14 15 16 Data to demonstrate the accuracy of MRI and ultrasonography for staging are sparse; the largest series included only 47 patients with both surgical and pathological correlation.9 Results suggest that MRI can accurately stage 72 percent of cases of advanced disease and 84 percent of cases of localized disease.11 For ultrasonography, the most optimistic projections of sensitivity and specificity are 92 percent and 70 percent, respectively.9 The costs of these techniques are high: endorectal ultrasonography costs $150 to $400 per study, and MRI, $700 to $1,200 per study. Thus, identification of the more accurate diagnostic technique is important for both quality of care and cost containment.

This article reports on the collaborative effort of five institutions that are part of the Radiological Diagnostic Oncology Group. More than 200 patients who were thought clinically to have localized cancer of the prostate were studied preoperatively with both MRI and transrectal ultrasonography to evaluate the ability of these techniques to determine the extent (stage) of the tumor. They underwent radical prostatectomy, and radiologic and pathological findings were correlated. Our data show that despite previous optimistic results, the currently available ultrasonography and MRI equipment cannot accurately determine the local extent of disease.

Methods

Patient Population

Five institutions participated in this study: the Cleveland Clinic, the Johns Hopkins Medical Institutions, Thomas Jefferson University Hospital, the University of Michigan, and the University of California, San Francisco. At each institution, from December 1987 to April 1989, any patient who was thought on clinical evaluation to have a surgically resectable tumor (clinical stage Ta or Tb, N0) was considered a potential candidate for enrollment in the study. Patients were excluded if they had a cardiac pacemaker, had undergone abdominoperineal resection, or had been treated for prostate cancer. If the patient and the clinical service agreed to treatment by radical prostatectomy, informed consent was obtained, and the patient was scheduled for both endorectal ultrasonography and MRI.

Imaging Studies

A uniform protocol for ultrasonography and MRI was developed. All institutions used state-of-the-art ultrasound equipment, with transducers of 5 to 7.5 MHz, biplanar capabilities, and sharply focused near fields. Units used in this project included those manufactured by Acuson (Mountain View, Calif.), Advanced Technology Laboratories (Bothell, Wash.), Aloka (Tokyo, Japan), Bruel and Kjaer (Marlborough, Mass.), Diasonics (Milpitas, Calif.), and General Electric (Milwaukee). All patients had biplanar examinations.

All MRI examinations were performed on a General Electric 1.5-tesla Signa MRI system. Initially, T1-weighted (repetition time, 400 msec; echo time, 20 msec; thickness, 10 mm; and skip [space between images], 2 mm) sagittal images were used for localization. Intermediate and T2-weighted (repetition time, 2500 msec; echo time, 40 or 80 msec, 60 or 120 msec, or 20 or 80 msec; thickness, 5 mm; and field of view, 24 or 28 cm) axial and sagittal scans through the prostate and seminal vesicles were obtained (for transverse scans, in an interleaved fashion so that sections were contiguous). To identify lymph nodes, T1-weighted axial scans (repetition time, 600 msec; echo time, 20 msec; thickness, 10 mm; and skip, 2 mm) were obtained from the level of the urogenital diaphragm to the aortic bifurcation.

During the development of the protocol, the investigators agreed on a list of definitions of items to be evaluated. Sample images were circulated to the investigators to illustrate these definitions. During the study all images were interpreted prospectively, with the use of standardized forms specifically developed for this project. No reader interpreted both the MRI and ultrasound studies from the same patient. The examiners, technologists, and interpreters were unaware of the results of the digital rectal examination, the other imaging study, and other data; they knew only that the patient had a clinically suspected localized cancer.

Information was obtained about the presence and size of tumors, the location of tumors, periprostatic-fat infiltration, seminal-vesicle involvement, and pelvic lymphadenopathy (nodes larger than 1 cm in diameter) on MRI. Interpreters used a five-point grading scale appropriate for receiver-operating-characteristic (ROC) curve analysis to rate their degree of confidence that periprostatic and seminal-vesicle invasion had occurred.

All MRI and ultrasound scans were read again, except for those from patients enrolled in the first four months of the study. The two radiologists from each institution jointly reevaluated the MRI and ultrasound scans to assess possible changes in interpretation resulting from the availability of data from the alternative study. Second readings were performed on the scans for 121 patients.

Pathological Analysis

All specimens were uniformly prepared by fixation of the surgically excised whole prostate in neutral buffered formalin for at least 24 hours. The specimens were coated with India ink (to ensure proper orientation), serially sectioned in the axial plane at intervals of 5 mm (whole-mount sections) or 2 to 3 mm (routine sections), and embedded in their entirety. The sections were designated so that the location of each lesion within the prostate would be accurate. The following were determined for all cancers with at least one dimension of more than 5 mm: location; size in each of three dimensions — anteroposterior, cephalocaudal, and transverse; capsular penetration (defined as extension of the tumor into periprostatic adipose tissue); seminal-vesicle invasion (extension into the muscle wall of the seminal vesicle); and metastasis to pelvic lymph nodes.

Statistical Analysis

A modified TNM (tumor, node, metastasis) staging system was used to categorize the clinical, ultrasound, MRI, and pathological findings. Stage Ta was defined as describing a nonpalpable cancer detected in a specimen obtained by transurethral prostatectomy. Stage Tb1—Tb2 described a palpable cancer confined to one side of the prostate, and stage Tb3 a palpable cancer involving both sides but confined to the prostate. Stage Tc1—Tc2 described a palpable lesion extending through the prostate capsule into the periprostatic fat, and Tc3 a palpable lesion extending into the seminal vesicles. Stage N0 was defined as indicating no regional lymph-node metastasis; stage N1, microscopical regional lymph-node metastasis; stage N2, gross regional lymph-node metastasis; and stage N3, extraregional lymph-node metastasis (including inguinal, periaortic, supraclavicular, or axillary nodes).

Because imaging and pathological studies cannot be used to differentiate palpable and nonpalpable disease, clinical stages Ta and Tb (both localized cancers) were grouped together. Subcategories of stage Tc were grouped together since the foremost point of clinical relevance was to distinguish localized (stages Ta and Tb) from advanced (stage Tc) cancers. Because endorectal ultrasonography cannot be used to evaluate pelvic lymph nodes, information about stage N was available only for pathological and MRI data. In addition, patients with gross lymphadenopathy (diagnosed preoperatively) were not subjected to surgery.

Data were analyzed to assess the ability of each technique to classify patients correctly into one of two groups (those with localized vs. those with advanced disease) and to detect lesions accurately as determined by subsequent pathological measurement. The imaging and pathological studies provided information on the location of each lesion in the prostate — that is, right versus left, anterior versus posterior, and cephalad versus midportion versus caudad; a computer algorithm was developed to match lesions seen on pathological analysis with those seen on imaging.

Accuracy of MRI and Ultrasound Studies

The sensitivity of each imaging technique was determined by calculating the percentage of patients correctly identified as having advanced disease. We also calculated the specificity of the techniques by determining the percentage of patients correctly identified as having localized disease. Asymptotic standard errors were computed whenever the available sample size was adequate. The sensitivities of MRI and ultrasonography were compared by the McNemar test.17 The same procedure was used to compare the specificities, and the results of two comparisons were then combined according to Fisher's procedure.18 To test the hypothesis that the readers were all equally accurate, we also calculated the diagnostic accuracies of all readers who had interpreted the findings for more than four patients.

Because detection of local invasion (periprostatic or seminal vesicle) is critical in cancer staging, a more comprehensive analysis of these features was performed. For periprostatic invasion, ROC curves were fitted to the ultrasound and MRI data (pooled for all readers) with the use of a bivariate normal model. The calculations were made with the computer program CORROC2,19 and the areas under the two curves were compared. For seminal-vesicle invasion, sensitivities and specificities were calculated; studies in which seminal-vesicle invasion was considered by the readers to be "possibly, probably, or definitely present" were considered to be abnormal.

Lesion Identification and Size Determination

Once the locations of the lesions were matched on imaging and pathological studies, we were able to determine the fraction of malignant lesions seen on imaging. We were also able to determine the accuracy of imaging by measuring the lesion pathologically. Sizes were measured in three dimensions (anteroposterior, cephalocaudal, and transverse). The abilities of the two imaging techniques to detect lesions of various sizes were compared by the McNemar test.

Results

Patient Population

The initial data set consisted of 249 consecutive patients from the five original institutions who were eligible for radical prostatectomy. Over a two-year period, one institution failed to enter any patients according to the prescribed protocol, and hence its data were excluded from the study. The mean age of the remaining 239 men was 60.8 years (range, 40 to 76). Among these patients, pathological examination of the specimens obtained during radical prostatectomy revealed no evidence of cancer in five; these patients had been given a diagnosis of cancer on the basis of transurethral prostate resection for hyperplasia. In four additional patients, the specimens were not sectioned according to the protocol. The data from these patients were excluded from analysis. Of the remaining 230 patients, 219 (95 percent) had ultrasound studies, 194 (84 percent) had MRI examinations, and 187 (81 percent) had both. Four patients who had ultrasound studies began the MRI studies but could not finish because of claustrophobia.

Staging Accuracy

When the sensitivities and specificities of the MRI and ultrasound studies were compared in the 187 patients who had both studies, the difference between the two techniques was of borderline significance (combined P = 0.09 by the McNemar test). The overall staging accuracy of ultrasonography was 58 percent (126 of 219 patients), with a standard error of 3 percent (Table 1Table 1Sensitivity and Specificity of Ultrasonography in Staging Operable Prostate Cancer in 219 Patients.*). Of the 92 patients with localized disease, ultrasonography correctly identified 42, yielding a mean (±SE) specificity of 46±5 percent. Of the 127 men with extension of disease beyond the prostate, ultrasonography correctly identified 84, yielding a sensitivity of 66±4 percent; in these patients there was an exact match between the site of periprostatic invasion detected by ultrasonography and that identified by pathological examination 71 percent of the time (63 of 89 sites).

The overall staging accuracy of MRI was 69 percent (133 of 194 patients), with a standard error of 3 percent (Table 2Table 2Sensitivity and Specificity of MRI in Staging Operable Prostate Cancer in 194 Patients.*). Of the 82 patients with localized disease, MRI correctly identified 47, yielding a specificity of 57±5 percent. Of the 112 men with advanced disease, MRI correctly identified 86, for a sensitivity of 77±4 percent; in these patients there was an exact match between the site of periprostatic invasion detected by MRI and that identified by pathological examination 76 percent of the time (71 of 94 sites). Among all patients having MRI studies, 185 had their pelvic nodes examined pathologically. MRI correctly identified 155 of 162 patients without tumor involvement of these nodes (specificity, 96 percent); its sensitivity was considerably lower (4 percent): only 1 of 23 involved nodes was detected.

When the overall accuracy of each technique was calculated for each reader in the study, there was considerable variation among readers. Although this was greater for the readers of ultrasound scans than for the readers of MRI scans, there was no significant difference among readers for either technique.

Predictive Value

When the sensitivities and specificities were converted to predictive values, the results were disappointing. For every 100 patients with ultrasound results suggesting extension beyond the prostate, only 63 would actually have had such disease; thus, 37 would have been falsely considered to have a more severe stage of disease. For every 100 patients with ultrasound results suggesting containment of the disease within the prostate, only 49 would actually have had such localized disease, and 51 would have been falsely considered to have a less severe stage of disease. For every 100 patients with MRI results suggesting extension beyond the prostate, only 71 would actually have had such disease; thus, 29 would have been falsely considered to have a more severe stage of disease. For every 100 patients with MRI results suggesting containment of the disease within the prostate, only 63 would actually have had such localized disease, and 37 would have been falsely considered to have a less serious stage of disease.

Accuracy for Detecting Periprostatic Extension

For the 187 patients who had both MRI and ultrasound studies there was no significant difference between the techniques in their ability to detect either periprostatic invasion or invasion of the seminal vesicles. For periprostatic extension, the mean (±SE) estimated area under the ROC curve for MRI was 0.67 (±5 percent) and for ultrasonography, 0.62 (±4 percent); these were not significantly different (two-sided P = 0.38). Agreement between the imaging studies about the site of penetration did not seem to increase the accuracy of the results. Pathological data agreed with imaging data in only 46 of 65 cases (71 percent) in which both imaging studies pointed to penetration at a specific site.

Ultrasonography correctly identified 14 of 65 seminal vesicles involved by tumor (sensitivity, 22 percent) and 270 of 308 seminal vesicles free of disease (specificity, 88 percent). The corresponding figures for MRI were 18 of 65 (28 percent) and 272 of 308 (88 percent).

Effect of Rereading the Ultrasound and MRI Scans

When the ultrasound scans were reexamined by readers with knowledge of the MRI results and when the MRI scans were reexamined by readers with knowledge of the ultrasound results, there were no statistically significant differences in accuracy between the first and second readings (Table 3Table 3Effect of Rereading the Ultrasound and MRI Scans on Sensitivity, Specificity, and Accuracy.*). There was, however, a systematic trend among readers to judge the disease as being at a more serious stage on the second reading than on the first, so that sensitivities were higher and specificities lower.

Effect of Size on the Detectability of Lesions

In two patients there was incomplete information about the exact location of the lesion on MRI, ultrasonography, or both. Thus, there were 185 patients for whom we could compare the ability of MRI and ultrasonography to detect and localize malignant lesions of various sizes. There were 299 distinctly separate cancers with at least one measured dimension more than 5 mm on pathological examination; 110 men had one lesion, 47 had two, 20 had three, 6 had four, 1 had five, and 1 had six lesions.

Among the 299 lesions, 143 (48 percent) were identified by both techniques, an additional 37 (12 percent) were detected only by MRI, and an additional 32 (11 percent) were detected by ultrasonography alone. A total of 212 lesions (71 percent) were identified by one or both of the imaging techniques. As expected, the ability to identify these lesions varied directly with size but minimally with the plane of imaging. For example, ultrasonography identified 53 percent of all lesions ≤1 cm in the anteroposterior dimension, whereas it identified 72 percent of the lesions that were larger than 1 cm. The corresponding percentages for MRI were 56 percent for the smaller lesions and 71 percent for the larger ones (Table 4Table 4Detection and Localization of Lesions by Ultrasonography, MRI, or Both, According to Lesion Size on Pathological Examination.). There was no statistically significant difference between the abilities of ultrasonography and MRI to identify lesions (combined P value >0.05 by the McNemar test).

Discussion

Increasing concern about the rising costs of health care and the effectiveness of current diagnostic and therapeutic procedures has led to renewed interest in comparative clinical studies. In the field of radiology such studies are of particular interest to patients with cancer because they strongly influence treatment choices. Nonetheless, comparative data on competing imaging methods have traditionally been difficult to obtain for two reasons. First, few institutions have enough patients with cancer to perform a statistically reliable and generalized study. Second, until the Radiological Diagnostic Oncology Group was established, there was no quick and efficient way for individual institutions to pool data and thereby to enlarge samples.

Our results are disappointing. With currently available commercial equipment, neither ultrasonography nor MRI can reliably differentiate microscopical local from advanced disease in patients presenting with clinically localized disease. The overall accuracy of ultrasonography was 58 percent, and of MRI, 69 percent; both were more accurate in identifying patients with advanced disease. Ultrasonography accurately staged confined disease in only 49 percent of the patients, and MRI in 64 percent, whereas the accuracy of staging for advanced disease was 63 percent for ultrasonography and 71 percent for MRI. Moreover, making the results of the other imaging method available to the reader had no effect on the accuracy of either method. Although there was no significant difference between MRI and ultrasonography at a P level of 0.05, the performance of MRI was consistently better than that of ultrasonography in all dimensions measured (Tables 1 and 2).

Unfortunately, when these findings on the accuracy of the techniques were translated into implications for patient care, the results were equally disappointing. With either method, the disease in a significant number of cases was either incorrectly staged or classified as less serious than it actually was. For example, for every 100 patients with clinically operable disease (the entry criterion for the study) for whom ultrasonography indicated that the disease had extended beyond the prostate, only 63 would actually have had such extension. The comparable number for MRI was 71 of 100 patients. The initial hope that MRI would improve staging accuracy by allowing imaging not only of the local prostate area but also of the pelvic nodes was not substantiated. MRI and presumably other cross-sectional imaging techniques currently are not able to identify microscopic spread of disease. Although the specificity of MRI was high (96 percent), the relatively low percentage of patients with nodal involvement in this population made its predictive value low — about 12 percent of all nodes positive on MRI would be positive on pathological examination. Whether this percentage is too low to indicate a treatment strategy is unclear and would depend on a weighing of the side effects of biopsy against the benefits of the information thus obtained.

Several possible explanations can be offered for the marked differences between our results and those of earlier, more optimistic studies.7 8 9 10 11 12 13 14 First, all of our patients were thought, on the basis of the initial clinical examination, to have surgically resectable disease, thus minimizing the possibility of including patients with obvious advanced disease.20 Second, our data were collected prospectively, and readers for one imaging examination were blinded to the results of the other as well as to the results of the pathological study. Third, the imaging techniques differed slightly from those other published reports.6 7 8 9 10 11 12 It is not clear to us why such changes in technique should have had such a profound effect on accuracy. Fourth, no cases were self-referred — that is, there was no overlap between detailed information obtained from the physical examination and the interpretation or performance of the imaging tests. Such an overlap could potentially have biased the results, although it is not entirely obvious in what direction the bias would have been. Finally, in previous studies the entire radical-prostatectomy specimens were not always "step-sectioned" to correlate exactly with imaging,10 , 12 which may mean that not all areas of microscopic tumor extension were identified. None of the imaging techniques available, including MRI, ultrasonography, and computed tomography, are able to identify microscopic disease. They can detect only macroscopic disease, whether or not there is an attempt to evaluate local disease, periprostatic or seminal-vesicle invasion, or lymph-node or distant spread of the tumor.

Another factor that may affect accuracy in this study and in others is the possibility of artifacts (hemorrhage or inflammation) due to an earlier biopsy. Theoretically, these would be expected to cause a decrease in specificity because scarring could be confused with tumor invasion. Thus, we believe that our results provide a minimal degree of accuracy that could be improved if imaging was performed before biopsy. Because of the expense of imaging studies, however, staging is usually not done until after the diagnosis of cancer is confirmed (e.g., after the biopsy). Possible pitfalls resulting from the use of biopsy will be a recurrent problem and probably will be unavoidable whatever the experimental design.

The data in Table 4 indicate that neither ultrasonography nor MRI can accurately detect and localize malignant tumors. Because this study relates to staging existing tumors, these data can offer only a lower limit of the sensitivity of these techniques for detection alone. It is generally believed that tumors do not spread beyond the confines of the prostate unless they reach a volume of at least 1.0 to 1.5 ml.21 , 22 Such a volume is consistent with data suggesting that cancer becomes aggressive when it attains an estimated mass of only 0.2 to 1.0 cm in diameter.21 , 23

Several approaches might lead to improvements in the accuracy of ultrasonography and MRI. First, analysis of the images with special attention to diagnostic features may lead to improvements for both MRI and ultrasonography, as it has for mammography.24 Second, for MRI, the use of noise reduction,25 fat suppression,26 and intrarectal surface coils27 , 28 may, as preliminary studies have suggested, be helpful and improve accuracy. Magnetic resonance spectroscopy may also be useful to determine the extent of prostate disease.29 30 31 The use of contrast agents in MRI may have potential benefits, and tissue characterization or diagnostic analysis may improve ultrasound results. Improved accuracy may permit the clinician to plan treatment with greater confidence than at present.

In terms of the methodologic results of this study, we suggest that the use of a study group like the Radiological Diagnostic Oncology Group is one way of providing data rapidly for use in decisions involving patient care. This particular group consisted initially of five institutions that presented preliminary data on nearly 100 patients in less than 12 months32 and on more than 200 patients in 15 months.

In summary, we believe that our results show that ultrasonography and MRI are not as accurate in staging early prostate disease as previous studies had reported. We also believe that the larger sample in this study as compared with earlier studies, its multi-institutional nature, and the use of a number of readers increase the likelihood that these conclusions can be generalized. Further refinements of these techniques should be supported because we believe that MRI and ultrasonography have the greatest potential in staging prostate cancer.

Supported in part by grants (U01-CA-45256 and P01-CA41167) from the National Cancer Institute.

We are indebted to our project officer at the National Cancer Institute, Dr. Matti Al-Aish, for help and support; to Paul L. Carson, Ph.D., Lawrence Crooks, Ph.D., and Albert Goldstein, Ph.D., all of whom helped develop equipment specifications and quality-control techniques for imaging; and to the following persons for their contributions: American College of Radiology — John J. Curry, Steven Mervis, M.B.A., Joanne Stetz, R.N.N., R.T.T., and Elaine Pakuris; Cleveland Clinic Foundation — Howard Levin, M.D., Ronald Lorig, MD., J. Edson Pontes, M.D., and Joan L. Clarke; Harvard Medical School — Shu Zhang, M.S.; Johns Hopkins Medical Institutions — Roger Sanders, M.D., Sheila Sheth, M.D., Clare Tempany, M.D., Mary Himmel, and Patrice Holtz, R.N.; Thomas Jefferson University Hospital — Hong Choi, M.D., Wolfgang Dähnert, M.D., Donald G. Mitchell, M.D., Peter McCue, M.D., S. Grant Mulholland, M.D., Alex Ranney, M.D., Theresa Matteucci, and JoAnn Gardner; University of California, San Francisco — Barbara Demas, M.D., and Hedwig Hricak, M.D.; and University of Michigan — Paul Gikas, M.D., Gary Glazer, M.D., H. Barton Grossman, M.D., Wayne Wolfson, M.D., Karen LaBarge, and Daphna Gelblum.

Source Information

From the Departments of Radiology at the Thomas Jefferson University Hospital, Philadelphia (M.D.R.), the Cleveland Clinic Foundation, Cleveland (D.M.P.), and the University of Michigan, Ann Arbor (L.E.Q.); the Departments of Radiology (E.A.Z., U.H.), Surgery (P.C.W.), and Pathology (J.I.E.), Johns Hopkins Medical Institutions, Baltimore; and the Department of Health Care Policy, Harvard Medical School (C.A.G., B.J.M.), Boston. Address reprint requests to Dr. Rifkin at the Department of Radiology, Thomas Jefferson University Hospital, 1033 Main Bldg., 10th and Sansom Sts., Philadelphia, PA 19107.

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Citing Articles

  1. 1

    Kyounghee Kim, Donghee Park, Jingam Park, Heung-il Ryu, Yumi Ko, Han Sung Kim, Jongbum Seo, Tae-Young Han. (2012) A lateral speckle tracking algorithm for ultrasound elastography. Journal of the Korean Physical Society 60:1, 171-176
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    Nelly Tan, Daniel J. A. Margolis, Timothy D. McClure, Albert Thomas, David S. Finley, Robert E. Reiter, Jiaoti Huang, Steven S. Raman. (2011) Radical prostatectomy: value of prostate MRI in surgical planning. Abdominal Imaging
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    Marko Brock, Christian von Bodman, Florian Sommerer, Björn Löppenberg, Tobias Klein, Thomas Deix, Jüri Rein Palisaar, Joachim Noldus, Thilo Eggert. (2011) Comparison of real-time elastography with grey-scale ultrasonography for detection of organ-confined prostate cancer and extra capsular extension: a prospective analysis using whole mount sections after radical prostatectomy. BJU International 108:8b, E217-E222
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    2011. Regression and Medical Test Accuracy. , 99-149.
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    J. Walz, M. Marcy, T. Maubon, S. Brunelle, J. Laroche, G. Gravis, N. Salem, F. Bladou. (2011) Élastographie en temps réel pour l’identification du cancer de prostate : comparaison d’imagerie préopératoire avec l’anatomopathologie après prostatectomie totale. Progrès en Urologie
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    Michael Seitz, Christian Gratzke, Boris Schlenker, Alexander Buchner, Alexander Karl, Alexander Roosen, Bernhard B. Singer, Patrick J. Bastian, Süleyman Ergün, Christian G. Stief, Oliver Reich, Derya Tilki. (2011) Contrast-enhanced transrectal ultrasound (CE-TRUS) with cadence-contrast pulse sequence (CPS) technology for the identification of prostate cancer. Urologic Oncology: Seminars and Original Investigations 29:3, 295-301
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    2011. References. , 481-517.
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    Michael L. Eisenberg, Janet E. Cowan, Benjamin J. Davies, Peter R. Carroll, Katsuto Shinohara. (2011) The importance of tumor palpability and transrectal ultrasonographic appearance in the contemporary clinical staging of prostate cancer. Urologic Oncology: Seminars and Original Investigations 29:2, 171-176
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    Seung Hwan Lee, Kyung Kgi Park, Kyung Hwa Choi, Beom Jin Lim, Joo Hee Kim, Seung Wook Lee, Byung Ha Chung. (2010) Is endorectal coil necessary for the staging of clinically localized prostate cancer? Comparison of non-endorectal versus endorectal MR imaging. World Journal of Urology 28:6, 667-672
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    Thomas Fischer, Anke Thomas, Isabell Tardy, Michel Schneider, Hana Hünigen, Pia Custodis, Dirk Beyersdorff, Johanna Plendl, Jörg Schnorr, Felix Diekmann, Ole Gemeinhardt. (2010) Vascular Endothelial Growth Factor Receptor 2-Specific Microbubbles for Molecular Ultrasound Detection of Prostate Cancer in a Rat Model. Investigative Radiology 45:10, 675-684
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    Osamu Ukimura. (2010) Evolution of precise and multimodal MRI and TRUS in detection and management of early prostate cancer. Expert Review of Medical Devices 7:4, 541-554
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    Oguz Akin, Christopher C. Riedl, Nicole M. Ishill, Chaya S. Moskowitz, Jingbo Zhang, Hedvig Hricak. (2010) Interactive dedicated training curriculum improves accuracy in the interpretation of MR imaging of prostate cancer. European Radiology 20:4, 995-1002
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    Fiona M. Fennessy, Kemal Tuncali, Paul R. Morrison, Clare M. Tempany. (2010) MR Imaging–Guided Interventions in the Genitourinary Tract: An Evolving Concept. Magnetic Resonance Imaging Clinics of North America 18:1, 11-28
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    Sedat Ozer, Deanna L. Langer, Xin Liu, Masoom A. Haider, Theodorus H. van der Kwast, Andrew J. Evans, Yongyi Yang, Miles N. Wernick, Imam S. Yetik. (2010) Supervised and unsupervised methods for prostate cancer segmentation with multispectral MRI. Medical Physics 37:4, 1873
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    Seo Yong Park, Jung Jun Kim, Tae Heon Kim, Soo Hyun Lim, Deok Hyun Han, Byung Kwan Park, Chan Kyo Kim, Ghee Young Kwon, Han Yong Choi, Hyun Moo Lee. (2010) The Role of Endorectal Magnetic Resonance Imaging in Predicting Extraprostatic Extension and Seminal Vesicle Invasion in Clinically Localized Prostate Cancer. Korean Journal of Urology 51:5, 308
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    Derek W. Cool, Lori Gardi, Cesare Romagnoli, Manale Saikaly, Jonathan I. Izawa, Aaron Fenster. (2010) Temporal-based needle segmentation algorithm for transrectal ultrasound prostate biopsy procedures. Medical Physics 37:4, 1660
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    Charlotte L. Foley, Mark R. Feneley. (2009) The clinical significance and therapeutic implications of extraprostatic invasion. Surgical Oncology 18:3, 203-212
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    Hashim U. Ahmed, Alex Kirkham, Manit Arya, Rowland Illing, Alex Freeman, Clare Allen, Mark Emberton. (2009) Is it time to consider a role for MRI before prostate biopsy?. Nature Reviews Clinical Oncology 6:4, 197-206
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    Nigel Borley, Mark R. Feneley. (2009) Prostate cancer: diagnosis and staging. Asian Journal of Andrology 11:1, 74-80
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    David Bonekamp, Katarzyna J. Macura. (2008) Dynamic Contrast-Enhanced Magnetic Resonance Imaging in the Evaluation of the Prostate. Topics in Magnetic Resonance Imaging 19:6, 273-284
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    Jurgen J. Fütterer, Jelle O. Barentsz, Stijn W.T.P.J. Heijmink. (2008) Value of 3-T Magnetic Resonance Imaging in Local Staging of Prostate Cancer. Topics in Magnetic Resonance Imaging 19:6, 285-289
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    Katarzyna J. Macura. (2008) Multiparametric Magnetic Resonance Imaging of the Prostate: Current Status in Prostate Cancer Detection, Localization, and Staging. Seminars in Roentgenology 43:4, 303-313
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    Osamu Ukimura, Thomas E. Ahlering, Inderbir S. Gill. (2008) Transrectal Ultrasound-Guided, Energy-Free, Nerve-Sparing Laparoscopic Radical Prostatectomy. Journal of Endourology 22:9, 1993-1996
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    Hyunjin Park, Morand R. Piert, Asra Khan, Rajal Shah, Hero Hussain, Javed Siddiqui, Thomas L. Chenevert, Charles R. Meyer. (2008) Registration Methodology for Histological Sections and In Vivo Imaging of Human Prostate. Academic Radiology 15:8, 1027-1039
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    A.M. Hövels, R.A.M. Heesakkers, E.M. Adang, G.J. Jager, S. Strum, Y.L. Hoogeveen, J.L. Severens, J.O. Barentsz. (2008) The diagnostic accuracy of CT and MRI in the staging of pelvic lymph nodes in patients with prostate cancer: a meta-analysis. Clinical Radiology 63:4, 387-395
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    Fiona M. Fennessy, Kemal Tuncali, Paul R. Morrison, Clare M. Tempany. (2008) MR Imaging–Guided Interventions in the Genitourinary Tract: An Evolving Concept. Radiologic Clinics of North America 46:1, 149-166
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    T HAMBROCK. 2008. Local staging of Prostate Cancer Using Endoretal Coil Magnetic Resonance Imaging. , 641-654.
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    Yiqiang Zhan, Yangming Ou, Michael Feldman, John Tomaszeweski, Christos Davatzikos, Dinggang Shen. (2007) Registering Histologic and MR Images of Prostate for Image-based Cancer Detection. Academic Radiology 14:11, 1367-1381
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    Ramaswamy Manikandan, Hasan A.R. Qazi, Joe Philip, Rahul Mistry, Gabby H. Lamb, Kenneth A. Woolfenden, Philip A. Cornford, Keith F. Parsons. (2007) Routine Use of Magnetic Resonance Imaging in the Management of T 1c Carcinoma of the Prostate: Is It Necessary?. Journal of Endourology 21:10, 1171-1174
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    Jurgen J. Fütterer. (2007) MR imaging in local staging of prostate cancer. European Journal of Radiology 63:3, 328-334
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    Fawzi T. Abul, Narayanaswamy Arun, Mona A. Abu-Assi, Akram M. Asbeutah. (2007) Transrectal ultrasound guided biopsy for detecting prostate cancer: can random biopsies be reduced using the 4-dimensional technique?. International Urology and Nephrology 39:2, 517-524
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    Gregory L. Lacy, Douglas W. Soderdahl, Javier Hernandez. (2007) Optimal cost-effective staging evaluations in prostate cancer. Current Urology Reports 8:3, 190-196
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    Bruce J. Hillman. (2007) Health Services Research of Medical Imaging: My Impressions. Academic Radiology 14:4, 381-384
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    Jurgen J. Fütterer, Marc R. Engelbrecht, Gerrit J. Jager, Robert P. Hartman, Bernard F. King, Christina A. Hulsbergen-Van de Kaa, J. Alfred Witjes, Jelle O. Barentsz. (2007) Prostate cancer: comparison of local staging accuracy of pelvic phased-array coil alone versus integrated endorectal–pelvic phased-array coils. European Radiology 17:4, 1055-1065
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    Hedvig Hricak, William T. Okuno. 2007. Male Pelvis Studies Using MRI. .
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    Oguz Akin, Hedvig Hricak. (2007) Imaging of Prostate Cancer. Radiologic Clinics of North America 45:1, 207-222
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    Alexander P.S. Kirkham, Mark Emberton, Clare Allen. (2006) How Good is MRI at Detecting and Characterising Cancer within the Prostate?. European Urology 50:6, 1163-1175
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    YUZURI TSURUMAKI, KYOICHI TOMITA, HARUKI KUME, TAKUHIRO YAMAGUCHI, TEPPEI MORIKAWA, SATORU TAKAHASHI, TAKUMI TAKEUCHI, TADAICHI KITAMURA. (2006) Predictors of seminal vesicle invasion before radical prostatectomy. International Journal of Urology 13:12, 1501-1508
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    Arnauld Villers, Philippe Puech, Damien Mouton, Xavier Leroy, Charles Ballereau, Laurent Lemaitre. (2006) Dynamic Contrast Enhanced, Pelvic Phased Array Magnetic Resonance Imaging of Localized Prostate Cancer for Predicting Tumor Volume: Correlation With Radical Prostatectomy Findings. The Journal of Urology 176:6, 2432-2437
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    Simon Phipps. (2006) Prostate tissue stiffness as measured with a resonance sensor system: a study on silicone and human prostate tissue in vitro. Medical & Biological Engineering & Computing 44:11, 941-943
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    Robert Ross, Mukesh Harisinghani. (2006) Prostate Cancer Imaging—What the Urologic Oncologist Needs to Know. Radiologic Clinics of North America 44:5, 711-722
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    Emanuele Casciani, Gian Franco Gualdi. (2006) Prostate cancer: value of magnetic resonance spectroscopy 3D chemical shift imaging. Abdominal Imaging 31:4, 490-499
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    Gilad E. Amiel, Kevin M. Slawin. (2006) Newer Modalities of Ultrasound Imaging and Treatment of the Prostate. Urologic Clinics of North America 33:3, 329-337
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    Yanong Zhu, Stuart Williams, Reyer Zwiggelaar. (2006) Computer technology in detection and staging of prostate carcinoma: A review. Medical Image Analysis 10:2, 178-199
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    Neil H Bander. (2006) Technology Insight: monoclonal antibody imaging of prostate cancer. Nature Clinical Practice Urology 3:4, 216-225
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    F. Yoon, G. Rodrigues, D. D'Souza, J. Radwan, M. Lock, G. Bauman, R. Ash, V. Venketesan, D. Downey, L. Stitt, D. Weisz, J. Izawa. (2006) Assessing the Prognostic Significance of Transrectal Ultrasound Extracapsular Extension in Prostate Cancer. Clinical Oncology 18:2, 117-124
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    Emanuele Casciani, Gian Franco Gualdi. (2006) Prostate cancer: value of magnetic resonance spectroscopy 3D chemical shift imaging. Abdominal Imaging
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    F.C. Kelleher, J. Armstrong. (2005) A Method for Assessing Accurate Application of the Partin Tables in the Pre-therapy Evaluation of Patients with Prostate Cancer. Clinical Oncology 17:8, 659-662
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    MICHAEL MULLERAD, HEDVIG HRICAK, KENTARO KUROIWA, DARKO PUCAR, HUI-NI CHEN, MICHAEL W. KATTAN, PETER T. SCARDINO. (2005) COMPARISON OF ENDORECTAL MAGNETIC RESONANCE IMAGING, GUIDED PROSTATE BIOPSY AND DIGITAL RECTAL EXAMINATION IN THE PREOPERATIVE ANATOMICAL LOCALIZATION OF PROSTATE CANCER. The Journal of Urology 174:6, 2158-2163
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    L. Rinnab, R. Küfer, R. E. Hautmann, B. G. Volkmer, M. Straub, N. M. Blumstein, H. W. Gottfried. (2005) Innovative Diagnostik in der Früherkennung und beim Staging des lokalisierten Prostatakarzinoms. Der Urologe 44:11, 1262-1276
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    2005. Anticoagulants. .
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    2005. Ultrasonics. .
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    Vinod Nargund, Dona Al Hashmi, Priya Kumar, Stephen Gordon, Ugo Otitie, David Ellison, Melvyn Carroll, Sohail Baithun, Keith E. Britton. (2005) Imaging with radiolabelled monoclonal antibody (MUJ591) to prostate-specific membrane antigen in staging of clinically localized prostatic carcinoma: comparison with clinical, surgical and histological staging. BJU International 95:9, 1232-1236
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    Xiao-Hua Zhou, Gengsheng Qin. (2005) A new confidence interval for the difference between two binomial proportions of paired data. Journal of Statistical Planning and Inference 128:2, 527-542
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    Jae Mann Song, Chun-Bae Kim, Hyun Chul Chung, Robert L. Kane. (2005) Prostate-Specific Antigen, Digital Rectal Examination and Transrectal Ultrasonography: A Meta-Analysis for This Diagnostic Triad of Prostate Cancer in Symptomatic Korean Men. Yonsei Medical Journal 46:3, 414
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    Hedvig Hricak, Liang Wang, David C. Wei, Fergus V. Coakley, Oguz Akin, Victor E. Reuter, Mithat Gonen, Michael W. Kattan, Chinyere N. Onyebuchi, Peter T. Scardino. (2004) The role of preoperative endorectal magnetic resonance imaging in the decision regarding whether to preserve or resect neurovascular bundles during radical retropubic prostatectomy. Cancer 100:12, 2655-2663
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    Adam B Hittelman, Rajveer S Purohit, Christopher J Kane. (2004) Update of staging and risk assessment for prostate cancer patients. Current Opinion in Urology 14:3, 163-170
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    Javier Hernandez, Ian M Thompson. (2004) Diagnosis and treatment of prostate cancer. Medical Clinics of North America 88:2, 267-279
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    FERGUS V. COAKLEY, ALIYA QAYYUM, JOHN KURHANEWICZ. (2003) Magnetic Resonance Imaging and Spectroscopic Imaging of Prostate Cancer. The Journal of Urology 170:6, S69-S76
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    Mona V. Sanghani, Delray Schultz, Clare M. Tempany, David Titelbaum, Andrew A. Renshaw, Marian Loffredo, Kerri Cote, Beth McMahon, Anthony V. D'Amico. (2003) Quantifying the change in endorectal magnetic resonance imaging-defined tumor volume during neoadjuvant androgen suppression therapy in patients with prostate cancer. Urology 62:3, 487-491
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    Roger Bourne, Phillip Katelaris, Suzanne Danieletto, Theresa Dzendrowskyj, Peter Stanwell, Carolyn Mountford. (2003) Detection of prostate cancer by magnetic resonance imaging and spectroscopy in vivo. ANZ Journal of Surgery 73:8, 666-668
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    Kate D Linton, Freddie C Hamdy. (2003) Early diagnosis and surgical management of prostate cancer. Cancer Treatment Reviews 29:3, 151-160
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    Alan Pollack, Eric M Horwitz, Benjamin Movsas, Alexandra L Hanlon. (2003) Mindless or mindful? Radiation oncologists' perspectives on the evolution of prostate cancer treatment. Urologic Clinics of North America 30:2, 337-349
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    Rajveer S Purohit, Katsuto Shinohara, Maxwell V Meng, Peter R Carroll. (2003) Imaging clinically localized prostate cancer. Urologic Clinics of North America 30:2, 279-293
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    Stefania Gelmini, Carmela Tricarico, Luisa Petrone, Gianni Forti, Andrea Amorosi, Giovanni L. Dedola, Mario Serio, Mario Pazzagli, Claudio Orlando. (2003) Real-Time RT-PCR for the Measurement of Prostate-Specific Antigen mRNA Expression in Benign Hyperplasia and Adenocarcinoma of Prostate. Clinical Chemistry and Laboratory Medicine 41:3, 261-265
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    Richard Clements. (2002) The role of transrectal ultrasound in diagnosing prostate cancer. Current Urology Reports 3:3, 194-200
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    Beverley A Wilkinson, Freddie C Hamdy. (2002) Staging in prostate cancer. Expert Review of Anticancer Therapy 2:1, 48-58
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    GERALD W. HULL, FARHANG RABBANI, FARHAT ABBAS, THOMAS M. WHEELER, MICHAEL W. KATTAN, PETER T. SCARDINO. (2002) CANCER CONTROL WITH RADICAL PROSTATECTOMY ALONE IN 1,000 CONSECUTIVE PATIENTS. The Journal of Urology528-534
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    Kyle K. Yu, Steven C. Eberhardt, Hedvig Hricak. 2002. Cancer of the Prostate. , 575-602.
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    Mark R. Feneley, Alan W. Partin. (2001) INDICATORS OF PATHOLOGIC STAGE OF PROSTATE CANCER AND THEIR USE IN CLINICAL PRACTICE. Urologic Clinics of North America 28:3, 443-458
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    Judd W. Moul, Christopher J. Kane, S. Bruce Malkowicz. (2001) THE ROLE OF IMAGING STUDIES AND MOLECULAR MARKERS FOR SELECTING CANDIDATES FOR RADICAL PROSTATECTOMY. Urologic Clinics of North America 28:3, 459-472
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    Timothy Campbell, John Blasko, E. David Crawford, Jeffrey Forman, Gerald Hanks, Deborah Kuban, James Montie, Judd Moul, Alan Pollack, Derek Raghavan, Paul Ray, Mack Roach, Gary Steinberg, Nelson Stone, Ian Thompson, Nicholas Vogelzang, Srinivasan Vijayakumar. (2001) Clinical staging of prostate cancer: Reproducibility and clarification of issues. International Journal of Cancer 96:3, 198-209
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    J.P.M Sedelaar, J.G.H van Roermund, G.L.J.H van Leenders, C.A Hulsbergen-van de Kaa, H Wijkstra, J.J.M.C.H de la Rosette. (2001) Three-dimensional grayscale ultrasound: evaluation of prostate cancer compared with benign prostatic hyperplasia. Urology 57:5, 914-920
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    Ali M. Ziada, Turner C. Lisle, Peter B. Snow, Richard F. Levine, Gary Miller, E. David Crawford. (2001) Impact of different variables on the outcome of patients with clinically confined prostate carcinoma. Cancer 91:S8, 1653-1660
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    James C. Kim, Glenn S. Gerber. (2001) Should laparoscopy be the standard approach used for pelvic lymph node dissection?. Current Urology Reports 2:2, 171-179
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    Seema S. Sonnad, Curtis P. Langlotz, J. Sanford Schwartz. (2001) Accuracy of MR imaging for staging prostate cancer: A meta-analysis to examine the effect of technologic change. Academic Radiology 8:2, 149-157
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    Takahiko Hachiya, Sadatsugu Minei, Ken-Ichirou Kobayashi, Hajime Ishida, Kiyoki Okada. (2000) Prediction of organ-confined disease by prostate-specific antigen nadir after neoadjuvant therapy. International Journal of Urology 7:11, 393-401
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    Mark R. Feneley, Alan W. Partin. (2000) Diagnosis of localized prostate cancer: 10 years of progress. Current Opinion in Urology 10:4, 319-327
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    RABI TIGUERT, EDWARD L. GHEILER, DAVID J. GRIGNON, PETER J. LITTRUP, WAEL SAKR, J. EDSON PONTES, DAVID P. WOOD. (2000) PATIENTS WITH ABNORMAL ULTRASOUND OF THE PROSTATE BUT NORMAL DIGITAL RECTAL EXAMINATION SHOULD BE CLASSIFIED AS HAVING CLINICAL STAGE T2 TUMORS. The Journal of Urology 163:5, 1486-1490
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    Michael R. Bernstein, Thomas Cangiano, Anthony D'Amico, Jesse Chittams, Christine Hardy, Richard D. Whittington, John E. Tomaszewski, Mitchell D. Schnall, Alan J. Wein, S.Bruce Malkowicz. (2000) Endorectal coil magnetic resonance imaging and clinicopathologic findings in T1c adenocarcinoma of the prostate. Urologic Oncology: Seminars and Original Investigations 5:3, 104-107
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    JUAN CARLOS QUINTANA, MICHAEL J. BLEND. (2000) The Dual-Isotope ProstaScint Imaging Procedure. Clinical Nuclear Medicine 25:1, 33
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    John Kurhanewicz, Daniel B. Vigneron, Ryan G. Males, Mark G. Swanson, Kyle K. Yu, Hedvig Hricak. (2000) THE PROSTATE: MR IMAGING AND SPECTROSCOPY. Radiologic Clinics of North America 38:1, 115-138
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    Kyle K. Yu, Hedvig Hricak. (2000) IMAGING PROSTATE CANCER. Radiologic Clinics of North America 38:1, 59-85
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    Anthony V. D'Amico, Frans Debruyne, Hartwig Huland, Jerome P. Richie. (1999) Innovative treatment for clinically localized adenocarcinoma of the prostate: The future role of molecular imaging. The Prostate 41:3, 208-212
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    MICHAEL PERROTTI, KEN-RYU HAN, ROBERT E. EPSTEIN, EUGENE C. KENNEDY, FARHANG RABBANI, KETAN BADANI, ALLAN J. PANTUCK, ROBERT E. WEISS, KENNETH B. CUMMINGS. (1999) PROSPECTIVE EVALUATION OF ENDORECTAL MAGNETIC RESONANCE IMAGING TO DETECT TUMOR FOCI IN MEN WITH PRIOR NEGATIVE PROSTASTIC BIOPSY: A PILOT STUDY. The Journal of Urology1314-1317
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    MICHAEL PERROTTI, KEN-RYU HAN, ROBERT E. EPSTEIN, EUGENE C. KENNEDY, FARHANG RABBANI, KETAN BADANI, ALLAN J. PANTUCK, ROBERT E. WEISS, KENNETH B. CUMMINGS. (1999) PROSPECTIVE EVALUATION OF ENDORECTAL MAGNETIC RESONANCE IMAGING TO DETECT TUMOR FOCI IN MEN WITH PRIOR NEGATIVE PROSTASTIC BIOPSY: A PILOT STUDY. The Journal of Urology 162:4, 1314-1317
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    SUDHANSHU GARG, BJØRN FORTLING, DAVID CHADWICK, MARY C. ROBINSON, FREDDIE C. HAMDY. (1999) STAGING OF PROSTATE CANCER USING 3-DIMENSIONAL TRANSRECTAL ULTRASOUND IMAGES: A PILOT STUDY. The Journal of Urology 162:4, 1318-1321
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    Hedrig Hricak. (1999) EDITORIAL: IMAGING PROSTATE CANCER. The Journal of Urology1329-1330
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    Hedrig Hricak. (1999) EDITORIAL: IMAGING PROSTATE CANCER. The Journal of Urology 162:4, 1329-1330
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    (1999) Session 1: Summary of clinical issues. Academic Radiology 6, S267-S277
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    Michael Perrotti, Allan Pantuck, Farhang Rabbani, Ron S Israeli, Robert E Weiss. (1999) Review of staging modalities in clinically localized prostate cancer. Urology 54:2, 208-214
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    ALEXANDRE de la TAILLE, MARK A. RUBIN, EMILIA BAGIELLA, CARL A. OLSSON, RALPH BUTTYAN, TATJANA BURCHARDT, CHARLES KNIGHT, KATHLEEN M. O'TOOLE, AARON E. KATZ. (1999) CAN PERINEURAL INVASION ON PROSTATE NEEDLE BIOPSY PREDICT PROSTATE SPECIFIC ANTIGEN RECURRENCE AFTER RADICAL PROSTATECTOMY?. The Journal of Urology 162:1, 103-106
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    Gary M Freedman, William G Negendank, Gary R Hudes, Andrew H Shaer, Gerald E Hanks. (1999) Preliminary results of a bone marrow magnetic resonance imaging protocol for patients with high-risk prostate cancer. Urology 54:1, 118-123
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    Zbigniew Petrovich, Gary Lieskovsky, Bryan Langholz, Bernard Bochner, Silvia Formenti, Oscar Streeter, Donald G Skinner. (1999) Adjuvant radiotherapy in patients with pathologic stage C (pT3N0) adenocarcinoma of the prostate. Urology 53:6, 1184-1193
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    Rajesh V. Iyer, Alexandra L. Hanlon, Wayne H. Pinover, Gerald E. Hanks. (1999) Outcome evaluation of the 1997 American Joint Committee on Cancer staging system for prostate carcinoma treated by radiation therapy. Cancer 85:8, 1816-1821
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    Robert H. Liebross, Alan Pollack, Scott P. Lankford, Gunar K. Zagars, Andrew C. von Eschenbach, Fady B. Geara. (1999) Transrectal ultrasound for staging prostate carcinoma prior to radiation therapy. Cancer 85:7, 1577-1585
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    J Rørvik. (1999) Use of pelvic surface coil MR imaging for assessment of clinically localized prostate cancer with histopathological correlation. Clinical Radiology 54:3, 164-169
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    Robert F. Wagner. (1999) Physical performance of diagnostic imaging modalities. Academic Radiology 6, S69-S71
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    Robert H Liebross, Alan Pollack, Scott P Lankford, Andrew C von Eschenbach, Gunar K Zagars. (1998) Relationship of ultrasound staging and bilateral biopsy positivity to outcome in stage T1c prostate cancer treated with radiotherapy. Urology 52:4, 647-652
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    Elizabeth A. Krupinski, Harold L. Kundel. (1998) Update on long-term goals for medical image perception research. Academic Radiology 5:9, 629-633
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    Kyle K. Yu, Hedvig Hricak, Gary D. Grossfeld, Peter R. Carroll. (1998) Prediction of patient outcome after radical prostatectomy by imaging: Choice of outcome measure. Academic Radiology 5, S347-S348
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    J HUSBAND, A PADHANI, A MACVICAR, P REVELL. (1998) Magnetic resonance imaging of prostate cancer: Comparison of image quality using endorectal and pelvic phased array coils. Clinical Radiology 53:9, 673-681
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    JEFF A. WIEDER, MARK S. SOLOWAY. (1998) INCIDENCE, ETIOLOGY, LOCATION, PREVENTION AND TREATMENT OF POSITIVE SURGICAL MARGINS AFTER RADICAL PROSTATECTOMY FOR PROSTATE CANCER. The Journal of Urology 160:2, 299-315
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    Yasuki Goto, Makoto Ohori, Peter T. Scardino. (1998) Use of Systematic Biopsy Results to Predict Pathologic Stage in Patients with Clinically Localized Prostate Cancer: A Preliminary Report. International Journal of Urology 5:4, 337-342
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    Marcia L Wills, Jurgita Sauvageot, Alan W Partin, Robin Gurganus, Jonathan I Epstein. (1998) Ability of Sextant Biopsies to Predict Radical Prostatectomy Stage. Urology 51:5, 759-764
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