MRI Effective for Monitoring Liver Fat in Obese Patients (IMAGE)
Caption
Proton density fat fraction (PDFF, percent) maps in a 55-year-old woman who underwent gastric bypass with preoperative very low calorie diet (VLCD) demonstrate progressive reduction in liver fat content. Regions of interest (circles) were obtained from each Couinaud segment of the liver, with care taken to avoid major vessels, and were averaged to obtain mean liver PDFF. Initial mean liver PDFF was 28.3 percent at the preoperative MRI (top left), which decreased to 18.9 percent following the preoperative VLCD period (top mid¬dle). Following gastric bypass, further decreases in PDFF were seen, measuring 9.0 percent at 1 month (top right), 5.8 percent at 3 months (bottom left), and finally normalizing to 4.1 percent at 6 months (bottom middle). A PDFF fat content scale is provided.
Credit
Radiological Society of North America
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