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. 2021 Oct 25;301(2):250–262. doi: 10.1148/radiol.2021204288

Figure 2:

Triglycerides have lower x-ray absorption than normal liver parenchyma, leading to decreased CT attenuation (measured in Hounsfield units) with increasing liver fat content. Shown are three example noncontrast CT images in patients with increasing degrees of fat content. Images were obtained in (A) a patient with normal liver and (B, C) patients with moderate-to-severe (B) and severe (C) hepatic steatosis. The MRI proton density fat fraction equivalent values to 65 HU, 23 HU, and –3 HU are approximately 0.5%, 25%, and 40%, respectively.

Triglycerides have lower x-ray absorption than normal liver parenchyma, leading to decreased CT attenuation (measured in Hounsfield units) with increasing liver fat content. Shown are three example noncontrast CT images in patients with increasing degrees of fat content. Images were obtained in (A) a patient with normal liver and (B, C) patients with moderate-to-severe (B) and severe (C) hepatic steatosis. The MRI proton density fat fraction equivalent values to 65 HU, 23 HU, and –3 HU are approximately 0.5%, 25%, and 40%, respectively.