(1) Observe the location of the kidneys: the normal kidneys are located in the range between the upper edge of the first lumbar spine and the lower edge of the third lumbar spine. The position of the left kidney is slightly higher than that of the right kidney by 1 to 2 cm, and the left kidney is 1% to 9% larger than the right kidney, and the size of the kidney shadow is basically symmetrical, but the difference in length between the two kidneys is not more than 1.5 cm. The kidney shape is generally smooth, when the kidney shape is not smooth, bumps and bumps should consider kidney tumors, chronic pyelonephritis, polycystic kidneys, kidney tuberculosis, cavernous kidneys and other conditions.
(2) Observation of urinary tract stones: More than 90% of urinary tract stones can be displayed in abdominal plains, and only 5% of photosensitive stones are not found.
(3) Observe whether the blood vessels are calcified: there may be signs of vascular calcification when the abdominal aorta or renal aneurysm.
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