Barentsz J O, Lemmens J A, Ruijs S H, Boskamp E B, Hendrikx A J, Karthaus H F, Kaanders J H, Rosenbusch G
Department of Diagnostic Radiology, University Hospital St. Radboud, Nijmegen, the Netherlands.
AJR Am J Roentgenol. 1988 Jul;151(1):107-12. doi: 10.2214/ajr.151.1.107.
Twenty-four patients with carcinoma of the urinary bladder were examined with MR imaging by using both a conventional body coil and a newly designed wraparound double surface coil. All patients had T1- and two patients had T2-weighted pulse sequences with both coils. Because of the long examination times, T2-weighted sequences in all other patients were obtained by using the double surface coil only. Nine patients underwent radical cystectomy, while the other patients had deep transurethral tumor resection and a clinical follow-up of at least 1.5 years. The results of imaging with the surface coil showed a twofold improvement of spatial resolution compared with the images obtained with the body coil. The RF field homogeneity was excellent, and the field of view was sufficiently large to achieve a complete study of the pelvis and the lower abdomen in one sequence. For the T1-weighted images, the higher spatial resolution of the double surface coil resulted in a significant (p less than .10) improvement in tumor staging. The accuracies of double-surface-coil and body-coil imaging were 79% and 54%, respectively. Double-surface-coil imaging appears to provide better MR images of the urinary bladder than body-coil imaging does, resulting in more accurate staging of tumors on T1-weighted pulse sequences.
对24例膀胱癌患者进行了磁共振成像检查，使用了传统的体线圈和新设计的环绕式双面线圈。所有患者均采用两种线圈进行T1加权成像，2例患者采用两种线圈进行T2加权脉冲序列成像。由于检查时间较长，其他所有患者的T2加权序列仅使用双面线圈获得。9例患者接受了根治性膀胱切除术，其他患者进行了深部经尿道肿瘤切除术，并进行了至少1.5年的临床随访。表面线圈成像结果显示，与体线圈获得的图像相比，空间分辨率提高了两倍。射频场均匀性极佳，视野足够大，能够在一个序列中对骨盆和下腹部进行完整的检查。对于T1加权图像，双面线圈较高的空间分辨率导致肿瘤分期有显著（p小于0.10）改善。双面线圈成像和体线圈成像的准确率分别为79%和54%。双面线圈成像似乎比体线圈成像能提供更好的膀胱磁共振图像，从而在T1加权脉冲序列上对肿瘤进行更准确的分期。
