A Semi-empirical Predictor for Visceral Fat Fraction from 3D Dual Echo Dixon Technique
نویسندگان
چکیده
Introduction: Central obesity with high abdominal visceral fat is known to be an indicator of metabolic syndrome [1]. A multi-echo acquisition with 2-point Dixon reconstruction with decomposition of aqua/lipid (MEDAL) simultaneously provides a set of four images per slices – in-phase, outphase, fat-only and water-only images [2]. A threshold based on MEDAL acquisition parameters applied to fat-only images can be used to evaluate visceral fat present within the peritoneal cavity to within a fraction of 0.1 of a manually assisted method in which visceral mask drawn on water-only image is used to demarcate the visceral region in the fat-only image [3] In this study, we demonstrate that the application of the threshold to an anatomical region ranging from T12 to iliac crest corresponding to the lower end of the L4 vertebral body permits a simple correction term to be used as a predictor to automatically assess the visceral fat fraction (VFF).
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