Dual kidney ultrasound can check the size, shape and position of the kidneys for kidney diseases, such as chronic glomerulonephritis, pyelonephritis, kidney stones, nephroblastoma, isolated kidney and other diseases. 1. Abnormal kidney size: renal ultrasound can show the size of the kidney. Enlargement of kidneys can be seen in hydronephrosis, crescentic nephritis, acute glomerulonephritis, etc. Atrophy of kidneys can be seen in chronic pyelonephritis, chronic glomerulonephritis in advanced stage. 2. Abnormal renal morphology: ultrasound of both kidneys can identify kidney stones, hydronephrosis, nephroblastoma and certain congenital urological diseases (such as polycystic kidneys and pelvic ureteral malformations), and it can also determine whether the renal mass is solid or cystic. 3. Abnormal kidney position: certain congenital urological diseases, such as isolated kidney, ectopic kidney, etc., as well as renal prolapse. It is recommended that patients with abnormal test results should go to regular hospitals in time, and further improve the examination under the guidance of professional doctors, in order to clarify the diagnosis of the disease and receive standardized treatment.