Miki K
Jikei University, School of Medicine, Department of Urology.
Nihon Rinsho. 1998 Aug;56(8):2046-51.
We assessed the usefulness of endorectal surface coil MRI (ERSC-MRI) for staging diagnosis of prostate cancer to compare preoperative ERSC-MRI findings with pathological staging in patients performed radical prostatectomy. MR imaging was performed on a 1.5 T MR system with an endorectal surface coil designed for imaging the prostate. At the time the coil was inserted, 1.0 mg of glucagon was injected in tramuscularly. T1-weighted MR images were obtained in the axial plane, and T2-weighted, spin echo MR images were obtained in the sagittal, coronal, and axial planes for each patient. The capsular penetration of prostatic cancer was defined according to the six diagnostic criteria by Outwater et al.: (1) a bulge formation of the low-signal-intensity area beyond the prostatic capsule, (2) low-signal-intensity stranding in the periprostatic tissue, (3) retraction of the prostatic capsule besides the low-signal-intensity area, (4) elongation of the low-signal-intensity area in the prostatic capsule, (5) thickening of prostatic capsule. (6) extracapsular tumor. The sensitivity, specificity and accuracy of ERSC-MRI for capsular penetration of the prostatic cancer were 95.5%, 40.0%, and 85.2%, respectively. These results indicate that ERSC-MRI is useful for staging diagnosis of prostatic cancer.
我们评估了直肠内表面线圈磁共振成像（ERSC-MRI）在前列腺癌分期诊断中的作用，以比较接受根治性前列腺切除术患者的术前ERSC-MRI检查结果与病理分期。使用专为前列腺成像设计的直肠内表面线圈，在1.5 T磁共振系统上进行磁共振成像。插入线圈时，经肌肉注射1.0 mg胰高血糖素。为每位患者在轴位平面上获取T1加权磁共振图像，并在矢状、冠状和轴位平面上获取T2加权自旋回波磁共振图像。前列腺癌的包膜侵犯根据Outwater等人的六项诊断标准定义：（1）前列腺包膜外低信号强度区域形成隆起；（2）前列腺周围组织中低信号强度条索；（3）低信号强度区域旁前列腺包膜回缩；（4）前列腺包膜内低信号强度区域延长；（5）前列腺包膜增厚；（6）包膜外肿瘤。ERSC-MRI对前列腺癌包膜侵犯的敏感性、特异性和准确性分别为95.5%、40.0%和85.2%。这些结果表明，ERSC-MRI对前列腺癌的分期诊断有用。
