Ultrasound examination of kidney stones does not usually occur without misdiagnosis. If stones are present in the kidney, the accuracy and specificity of ultrasound examination is greater than 99%. Ultrasound examination of kidney stones is a relatively accurate, non-invasive, radiation-free and inexpensive method of examination, and can be used as a first choice for kidney stones. For patients with stones, a routine urine test is also needed to distinguish them from other calcified diseases of the kidney. This is because stones in the kidney are almost always accompanied by positive occult blood in the urine, but calcifications in the kidney may appear as normal urine routine with high-density masses detected by ultrasound. However, repeated ultrasound examinations can determine whether the calcification is in the kidney or a stone in the kidney. For patients with unclear diagnosis or specific medical history, CT of the kidney can be used to further assist the diagnosis if necessary.