We assessed the effect of posture on kidney volume measured in the supine and upright positions using an original MRI system that can image in any posture (multiposture MRI). We compared the kidney volume (whole kidney, renal cortex, medulla, and pelvis) between the supine and upright positions. Upright position reduced whole kidney, renal cortex, and medulla volumes, and these differences between postures potentially provide new diagnostic information.
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