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. 2021 Apr 30;12:58. doi: 10.1186/s13244-021-00999-3

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© The Author(s) 2021

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Fig. 3 — Relationship between the superior mesenteric artery (red arrow) and superior mesenteric vein (blue arrow). a Normal (SMA on the left side of SMV); b the SMV forms an angle around the SMA toward the right abdominal cavity; c abnormal (inversion); 3d: the SMV goes straight to the right abdomen