Fisher M R, Hricak H, Crooks L E
Radiology. 1985 Nov;157(2):467-70. doi: 10.1148/radiology.157.2.4048457.
The normal urinary bladder and several benign entities of the bladder were examined in 50 patients by magnetic resonance (MR) imaging. Specific features assessed included appearance of the bladder wall, optimal repetition (TR) and echo delay (TE) parameters for bladder-wall demonstration, and differentiation among various benign abnormalities, including bladder-wall hypertrophy, inflammation, and mucosal congestion, on MR images. The bladder wall in the 30 healthy subjects was best displayed using a TR = 2 sec, TE = 56 msec image, which gave 60% contrast between the bladder wall and urine and 48% contrast between the bladder wall and fat. Demonstration of bladder-wall hypertrophy required similar imaging; bladder distention was necessary to demonstrate the thickness of the bladder wall. Congestion and inflammation were best demonstrated on TR = 2 sec, TE = 56 msec images, which gave 45% contrast. Normal and/or hypertrophic bladder wall were distinguished from inflammation and congestion on the basis of signal intensity variations and/or T1 and T2 relaxation parameters.
对50例患者的正常膀胱及膀胱的几种良性病变进行了磁共振（MR）成像检查。评估的具体特征包括膀胱壁的外观、显示膀胱壁的最佳重复时间（TR）和回波延迟（TE）参数，以及在MR图像上区分各种良性异常，包括膀胱壁肥厚、炎症和黏膜充血。30名健康受试者的膀胱壁在TR = 2秒、TE = 56毫秒的图像上显示最佳，该图像在膀胱壁与尿液之间产生60%的对比度，在膀胱壁与脂肪之间产生48%的对比度。显示膀胱壁肥厚需要类似的成像；膀胱充盈对于显示膀胱壁厚度是必要的。充血和炎症在TR = 2秒、TE = 56毫秒的图像上显示最佳，该图像产生45%的对比度。根据信号强度变化和/或T1及T2弛豫参数，可将正常和/或肥厚的膀胱壁与炎症和充血区分开来。
