Injury, speed and other advantages. X-ray examination is of great value in the diagnosis of prostate diseases. For example, plain film can detect whether there is calcification or calculus shadow in prostate. Angiography can help to check whether there is prostate hyperplasia or prostate cancer. CT examination is more important for differential diagnosis of prostate diseases. In addition, urodynamic examination of lower urinary tract is very helpful for the diagnosis of benign prostatic hyperplasia. Cystoscope can directly observe the hyperplasia of posterior urethra, seminal vesicle and middle and lateral lobe of prostate, and it is also very important for the diagnosis of prostate diseases.