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The quantification of IntraVoxel incoherent motion – MRI maps cannot preserve texture information: An evaluation based on simulated and in-vivo images by Elisa Scalco; Giovanna Rizzo; Alfonso Mastropietro is a Medicine article available to read on EtoBox.

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Background Radiomics can be applied on parametric maps obtained from IntraVoxel Incoherent Motion (IVIM) MRI to characterize heterogeneity in diffusion and perfusion tissue properties. The purpose of this work is to assess the accuracy and reproducibility of radiomic features computed from IVIM maps using different fitting methods. Methods 200 digitally simulated IVIM-MRI images with various SNR containing different combinations of texture patterns were generated from ground truth maps of true diffusion D, pseudo-diffusion D* and perfusion fraction f. Four different methods (segmented least-square LSQ, Bayesian, supervised and unsupervised deep learning DL) were adopted to quantify IVIM maps from simulations and from two real images of liver tumor. Radiomic features were computed from ground truth and estimated maps. Accuracy and reproducibility among quantification methods were assessed. Results Almost 50% of radiomic features computed from D maps using DL approaches, 36% using Bayes and 27% using LSQ presented errors lower than 50%. Radiomic features from f and D* maps were accurate only if computed using DL methods from histogram. High reproducibility (ICC>0.8) was found only fo

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Author

Elisa Scalco; Giovanna Rizzo; Alfonso Mastropietro

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Medicine (Physical Sciences)