There are more kidney ultrasound examinations, as follows: 1. Check whether there are congenital diseases, such as renal agenesis on one side, fused kidney, double renal pelvis malformation; 2. If the patient is traumatized, check whether there is rupture of the envelope, whether there is hematoma around the kidney, whether there is cyst, polycystic kidney, whether there is long tumor, whether there is hydronephrosis, whether there is kidney stone; 3. The highest chance of malignancy in the kidney is clear cell carcinoma, which manifests The most malignant kidney mass is clear cell carcinoma, which is a hypoechoic mass, and benign malignant tumor is a hyperechoic lesion. The nature of kidney masses is not only judged by the strength or size of the echogenicity, but now there are also more auxiliary means, such as ultrasonography of the masses and ultrasound-guided aspiration biopsy of the kidney masses, which can assist in making a clear diagnosis. Patients with urinary tract stones have different locations of urinary tract stones and different ultrasound performance.