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Abstract #2026

Evaluation of gravity effect on portal venous flow using multi-posture MRI

Yoshisuke Kadoya1, Tosiaki Miyati2, Naoki Ohno2, Satoshi Kobayashi2, and Toshifumi Gabata1

1Radiology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan, 2Division of Health Sciences, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan

Portal venous flow (PVF) seems to be affected by gravity, ie., it depends on the body posture. We validated the effect of gravity on PVF in supine and upright positions using an original multi-posture MRI. We compared maximum PVF, PVF velocity, PVF volume, and cross-sectional area of portal vein between supine and upright positions. The mean PVF velocity, PVF volume, maximum PVF, and cross-sectional area in the upright position were significantly lower than those in the supine position. Gravity reduces PVF velocity and volume, and these differences between postures potentially provide new diagnostic information.

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