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目的探讨MRI定量测定对前列腺增生的诊断及分度。方法前列腺增生组25例,MRI测量前列腺和中央腺的前后径、左右径、上下径,并计算其体积、重量,以及中央腺体积占前列腺总体积的比例。分析比较不同年龄段、不同增生程度与正常组间各径线MR测量值。结果增生前列腺组前后径、左右径、上下径、体积及重量均大于正常者,中央腺体积占腺体比例平均为46.1%,明显大于正常的20.4%。不同增生程度前列腺及中央腺前后径、左右径、上下径、体积及重量MR测量值各项间均存在着显著性差异(P<0.05)。25例前列腺增生均发生在中央腺,1例合并外周带增生,中央腺体积增大,信号不均匀,外周带受压变薄甚至消失,信号减低;增生结节T2WI可呈高、等、低信号,增强扫描呈轻度不均匀强化。结论中央腺体积占前列腺总体积的比例可作为判断是否存在前列腺增生和判断前列腺增生程度的指标。
Objective To investigate the diagnosis and index of benign prostatic hyperplasia by quantitative MRI. Methods 25 cases of benign prostatic hyperplasia, MRI measurement of prostate and central gland anteroposterior diameter, left and right diameter, diameter, and calculate the volume, weight, and the proportion of the central gland volume of the total prostate volume. Analyze and compare MR measurements of different diameters of different age groups, different degrees of proliferation and normal group. Results Prostate and anteroposterior diameter, diameter, diameter, volume and weight of the prostate were significantly higher than those of the normal group. The ratio of the central gland to the gland was 46.1% on average, significantly higher than that of the normal 20.4%. There were significant differences (P <0.05) among the various degrees of hyperplasia of prostate and central gland anterior and posterior diameter, left and right diameter, up and down diameter, volume and weight MR measurements. 25 cases of benign prostatic hyperplasia occurred in the central gland, a case of peripheral zone with hyperplasia, central gland enlargement, the signal is not uniform, the outer zone with the pressure thinning or even disappear, the signal decreased; hyperplastic nodules T2WI showed high, low Signal, enhanced scan was slightly uneven enhancement. Conclusion The proportion of the central gland volume to the total prostate volume can be used as an index to determine whether there is benign prostatic hyperplasia and determine the degree of benign prostatic hyperplasia.