Ultrasound examination of the male urological system is mainly to understand whether there are abnormal lesions and structural abnormalities in the kidney, ureter and bladder. Through ultrasound examination, some conditions can be initially diagnosed or identified, such as renal pelvic stones, ureteral stones, bladder stones and occupational lesions in the urinary tract such as renal pelvic tumors, renal cysts, renal parenchymal occupations, ureteral occupations and bladder occupational lesions. The ultrasound will also reveal the various causes of hydronephrosis and measure the extent of hydronephrosis and the thickness of the renal cortex. The ultrasound will also measure the thickness of the bladder wall, whether the bladder wall is gross, and whether there are any abnormal proliferative lesions in the bladder wall.