Renal ultrasound is about 100 RMB. Renal ultrasound is a common examination in nephrology department, which is mainly to find out whether there are occupying lesions in the kidney, such as kidney cancer, kidney stone, stenosis of ureteral junction of the renal pelvis and hydronephrosis, etc. It can also measure the size of the kidneys. It can also measure the size of the kidneys, if the kidneys shrink, it indicates chronic kidney disease, if the kidneys increase, it is considered that the kidneys have acute disease. Fasting is not required for this test, and it is best to hold your urine for the test, because some urinary diseases can cause urine reflux when holding your urine, which can detect the specific cause of the disease, such as reflux nephropathy. This test is about 100 dollars, but due to the price level of each region is different, more or less different.