超高 b 值 3.0T 扩散加权磁共振成像诊断前列腺癌的准确性。
Diagnostic accuracy of ultra-high-b-value 3.0-T diffusion-weighted MR imaging for detection of prostate cancer.
机构信息
Department of Radiology, Showa University School of Medicine, Tokyo 142-8555, Japan.
出版信息
Clin Imaging. 2012 Sep-Oct;36(5):526-31. doi: 10.1016/j.clinimag.2011.11.016. Epub 2012 Jun 8.
PURPOSE
To investigate the diagnostic accuracy of 3.0-T diffusion-weighted imaging (DWI) for detection of prostate cancer by using different b-values.
METHODS
Seventy-three patients underwent magnetic resonance imaging (MRI) at 3.0 T. Three MRI sets were reviewed by two radiologists: MRI and DWI (b = 500 s/mm(2)) (protocol A), MRI and DWI (b = 1000 s/mm(2)) (protocol B), and MRI and DWI (b = 2000s/mm(2)) (protocol C). Areas under the receiver operating characteristic curve (AUCs) were calculated.
RESULTS
The mean of the AUCs in protocol C was larger than those in protocol A and in protocol B (P<.05).
CONCLUSION
DWI (b = 2000s/mm(2)) at 3.0 T can improve the diagnostic accuracy for detection of prostate cancer.
目的
通过使用不同的 b 值，来研究 3.0-T 扩散加权成像（DWI）检测前列腺癌的诊断准确性。
方法
73 例患者在 3.0T 磁共振成像（MRI）下进行检查。两位放射科医生对 3 套 MRI 进行了回顾：MRI 和 DWI（b = 500 s/mm²）（方案 A）、MRI 和 DWI（b = 1000 s/mm²）（方案 B）以及 MRI 和 DWI（b = 2000s/mm²）（方案 C）。计算了受试者工作特征曲线（ROC）下的面积（AUC）。
结果
方案 C 的 AUC 均值大于方案 A 和方案 B（P<.05）。
结论
3.0T 的 DWI（b = 2000s/mm²）可提高检测前列腺癌的诊断准确性。
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