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Abstract #1669

Comparison of fat content measured by MRI water-fat separation, MR spectroscopy and chemical analysis on salmon

Julien Picaud 1,2 , Guylaine Collewet 1 , Giulio Gambarota 3,4 , and Jerome Idier 2

1 UR TERE, IRSTEA, Rennes, France, 2 IRCCyN, CNRS, Nantes, France, 3 UMR 1099, INSERM, Rennes, France, 4 LTSI, Universite de Rennes 1, Rennes, France

The purpose of this study was to compare fat quantification on fish using MRI water/fat separation with localized spectroscopy (MRS) and with chemical analysis. 36 samples inside a wild salmon were used for MRI vs. MRS and 15 salmon cutlets for MRI vs. chemical analysis. MRI images and MRS spectra were acquired at 1.5T. We used GRE with 6 echoes and the VarPro reconstruction method proposed by Hernando (MRM 2010, 63-1). High correlations were found in both cases. Very good agreement was found between MRI and MRS while and overestimation of fat content was observed for MRI versus chemical analysis.

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