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目的：采用排尿法ＣＴ（ＭＣＴ）检查方法，评价增生的前列腺组织对尿道的压迫、对排尿功能的影响和膀胱的继发性改变。方法：将３２例患者分为二组：正常组１０例，增生组２２例。增生组又分为３个型，肿块型１４例，结节型３例，混合型５例。在注射造影剂后３０ｍｉｎ～１ｈ，进行排尿法ＣＴ检查。观察前列腺段尿道的形态改变及计算其截面积；记录排尿时间、排尿量；计算膀胱残余尿量及膀胱排尿指数；观察膀胱壁的形态改变。结果：正常前列腺段尿道有点圆形、椭圆形、圆形及三角形等数种形态，它们是不同排尿时相的表现。尿道后壁中央有精阜突出，尿道内口呈圆形。增生组表现为尿道受压，截面积变小和尿道移位、扭曲等，同时伴有排尿功能的改变和膀胱残余尿量的增加。肿块型增生时，尿道受压较严重，排尿时间明显延长。结节型增生对排尿时间影响不大。膀胱壁的继发改变有膀胱小梁形成及真性和／或假性憩室。结论：ＭＣＴ能揭示前列腺增生的病理过程——压迫尿道产生排尿不畅以及膀胱的继发病变，是一种较为理想的前列腺增生的检查方法
OBJECTIVE: To evaluate the effects of urethral compression, urethral function and urinary bladder secondary changes on prostatic hyperplastic prostate tissue by using the method of micturition CT (MCT). Methods: 32 patients were divided into two groups: 10 cases in normal group and 22 cases in proliferative group. The hyperplasia group was divided into three types, mass type in 14 cases, nodular type in 3 cases and mixed type in 5 cases. 30min ~ 1h after injection of contrast agent for urinary CT examination. Observe the morphological changes of the urethra in the prostate segment and calculate the cross-sectional area; record urination time and urination volume; calculate residual urinary bladder volume and urinary bladder urinary index; observe the morphological changes of the bladder wall. Results: The normal urethra urethra somewhat circular, oval, round and triangular and other forms, they are different urinary phase performance. Urethral wall posterior wall has fine Fu prominent, urethral mouth was round. Hyperplasia group showed urethral compression, cross-sectional area and urethral displacement, distortion, accompanied by changes in urinary function and bladder residual urine volume increased. Mass hyperplasia, the urethra more serious pressure, urination was significantly prolonged. Nodular hyperplasia had little effect on urination time. Secondary changes to the bladder wall include trabecular formation and true and / or pseudo-diverticula. Conclusion: MCT can reveal the pathological process of benign prostatic hyperplasia - urinary tract obstruction caused by poor urination and bladder secondary lesions, is an ideal method for the detection of benign prostatic hyperplasia