Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628, USA.
Clin Imaging. 2012 Sep-Oct;36(5):547-52. doi: 10.1016/j.clinimag.2011.11.028. Epub 2012 Jun 8.
The objective of this study was to compare the accuracy of T2-weighted magnetic resonance (MR) imaging and transrectal ultrasound (TRUS) for staging of prostate cancer.
A total of 101 men with biopsy-proven prostate cancer undergoing both T2-weighted endorectal MR imaging and B-mode TRUS for local tumor staging prior to radical prostatectomy were retrospectively identified. Three MR readers rated the likelihood of locally advanced disease using a 5-point scale. An ultrasound reader performed the same rating. Staging accuracy was compared using receiver operating characteristic curves.
Staging accuracy was not significantly different between MR imaging (A(z) = 0.69-0.70) and TRUS (A(z) = 0.81, P>.05).
T2-weighted MR imaging demonstrates comparable accuracy to B-mode TRUS for depicting locally invasive prostate cancer.
本研究旨在比较 T2 加权磁共振（MR）成像和经直肠超声（TRUS）在前列腺癌分期中的准确性。
回顾性分析了 101 例经活检证实患有前列腺癌且在接受根治性前列腺切除术前行 T2 加权直肠内 MR 成像和 B 型 TRUS 进行局部肿瘤分期的患者。3 位 MR 读者使用 5 分制对局部进展性疾病的可能性进行评分。超声读者进行了相同的评分。使用受试者工作特征曲线比较分期准确性。
MR 成像（A(z) = 0.69-0.70）和 TRUS（A(z) = 0.81，P>.05）之间的分期准确性无显著差异。
T2 加权 MR 成像在描绘局部侵袭性前列腺癌方面与 B 型 TRUS 具有相当的准确性。
