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Abstract #2466

Investigating the relationship between diffusion MRI signal cumulants and hepatocyte microstructure at fixed diffusion time

Francesco Grussu1, Kinga Bernatowicz1, Ignasi Barba2, and Raquel Perez-Lopez1,3
1Radiomics Group, Vall d'Hebron Institute of Oncology, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain, 2NMR Lab, Vall d'Hebron Institute of Oncology, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain, 3Department of Radiology, Hospital Universitari Vall d'Hebron, Barcelona, Spain

To date, limited attention has been paid to diffusion-weighted (DW) MRI signal modelling of the liver, where new imaging methods are needed to tackle diseases such as cancer. We report on Monte Carlo (MC) simulations run in synthetic hepatic cells to inform the developing of new model-based methods for liver application. We specifically investigate the question: “can cell size and diffusivity be estimated from signal cumulants at fixed diffusion time and realistic SNR?”, and find that the task is feasible for clinical diffusion times and b=0 SNR as low as 20, provided that both apparent diffusivity and kurtosis are considered.

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