前列腺癌与增生低场磁共振鉴别诊断价值的探讨

目的　分析低场MRI对前列腺癌与增生的诊断及鉴别诊断的价值。方法　收集 18例前列腺癌与 2 2例前列腺增生病例的MRI图像 ,分析其表现和特征。结果　前列腺癌 66.7%发生于外周区 ,信号改变以T2 WI较为明显 ,表现为高信号的周围区内出现异常低信号 ,而前列腺增生则 72 .7%发生于中央区或移行区 ,主要表现为在T2 WI的中央区或移行区中出现高、低、等混合不均的异常信号。结论　低场MRI的T2 WI对前列腺癌和增生有鉴别诊断意义 ,并对于包膜的侵犯与否具有较高的诊断价值。

The value of low-field magnetic resonance imaging in the differentiation of prostatic carcinoma with BPH

Objective To analyse the value of low-field magnetic resonance imaging in the differentiation of prostatic carcinoma with Benign prostatic hyperplasia (BPH). Methods MRI in 18 cases of prostatic carcinoma and 22 cases of BPH were retrospectively analysed.Results 66.7% of prostatic carcinoma occured in the peripheral zone(PZ). The abnormal signals were mainly depicted on T2-weighted images, on which the cancer appeared as an area of low signal intensity in the hyperintense PZ.In contrast, 72.7% of BPH occured in the central zone(CZ) or transient zone(TZ) and the heterogeneous mixed signals area were observed on T2-weighted images.Conclusion T2-weighted image of low-field magnetic resonance imaging is helpful for differentiation of prostatic carcinoma with BPH and for detection of capsule involvement.