Fig. 9
From: Advances in liver US, CT, and MRI: moving toward the future
Liver fat detection and quantification in patients with nonalcoholic steatohepatitis undergoing in- and out-of-phase magnetic resonance imaging sequences (first and second columns, respectively), and proton density fat fraction (PDFF, third column). Top row: 78-year-old man without hepatic steatosis. Note the lack of signal drop on out-of-phase image and PDFF of only 3–4%. Middle row: 39-year-old woman with moderate hepatic steatosis. Note the minimal signal drop on out-of-phase image and PDFF from 8 to 16%. Bottom row: 48-year-old man with severe hepatic steatosis. Note the marked signal drop on out-of-phase image and PDFF from 45 to 49%