58-year-old patient with right lower quadrant pain, who underwent abdominopelvic CT using dual-energy system (IMAGE)

American Roentgen Ray Society

58-year-old patient with right lower quadrant pain, who underwent abdominopelvic CT using dual-energy system

Caption

Left to right: Axial conventional portal-venous phase postcontrast image, iodine overlay image, virtual noncontrast attenuation image, and fat-fraction map show left adrenal mass (arrow). Based on mean values of two readers, mass has conventional portal-venous phase attenuation of 68.9 HU, virtual noncontrast attenuation of 15.7 HU, fat fraction of 26.2%, iodine density of 2.2 mg/mL, normalized iodine density of 0.42, ratio of normalized iodine density to virtual noncontrast attenuation of 0.027, and relative enhancement ratio of 339%. Mass was diagnosed as adenoma based on two criteria applied in present investigation, assessed using noncontrast CT performed 7 years earlier (attenuation ≤10 HU on noncontrast images, and >1-year size stability).

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ARRS/AJR

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