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Computed tomography of the abdomen for assessment of liver fat in a 16-year-old female study participant with severe obesity (BMI, 42 kg/m2) before sleeve gastrectomy (A) and 12 months after surgery (BMI, 27 kg/m2) (B). There is an increase in liver attenuation corresponding to a decrease in liver fat after surgery (liver/spleen ratio .4 presurgery vs 1.2 postsurgery). BMI, body mass index.
