OVD was found on 13.7% of 1042 consecutive female abdominal and pelvic CT scans, with "nutcracker anatomy" present in 14.4% of the scans with left OVD. Moderate dilatation was defined as an OVD of 6-8 mm at the iliac crests.

Technetium-99m-macroaggregated albumin (99m Tc-MAA) scintigraphy is used to simulate hepatic 90 Y radioembolization distribution. In partition model dosimetry, the tumor to background normal liver (T/N) ratio estimated from Tc-MAA scintigraphy is used to prescribe 90 Y dose. This requires infusion of 99m Tc-MAA into the liver. The aim of this study was to investigate the level of agreement between the T/N ratio as measured by arterial phase multidetector computed tomography (A-MDCT) and the ratio as measured by single-photon emission CT (SPECT) Tc-MAA scintigraphy. Materials: Institutional review board approval was obtained for this retrospective review of patients with hepatocellular carcinoma. Between January 2014 and June 2017, 22 patients (mean age 64 years; 20 male) underwent A-MDCT before undergoing 99m Tc-MAA SPECT. Volumes of interest delineated in the tumors

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