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Abstract #2601

Measuring Perfusion in Peripheral Artery Disease Using an Advanced IVIM Method

Nahla M H Elsaid1, Gigi Galiana1,2, Stephanie L Thorn3, Billy Vermillion3, Rachel Burns3, Sun-Joo Jung3, Fatema T Zohoro3, Albert J Sinusas1,2,3, and Hemant D Tagare1,2
1Radiology and Biomedical Imaging, Yale University, New Haven, CT, United States, 2Biomedical Engineering, Yale University, New Haven, CT, United States, 3Medicine (Cardiology), Yale University, New Haven, CT, United States

Synopsis

Keywords: IVIM, Perfusion, Peripheral Artery Disease

Motivation: Peripheral artery disease (PAD) is associated with diabetes, significant comorbidities and mortality-related to coexisting microvascular-disease (MVD) and injury.

Goal(s): To better understand and phenotype PAD, we developed a novel method for intravascular incoherent motion (IVIM) that is clinically feasible and can calculate accurate IVIM-parameter maps reflective of perfusion and tissue viability.

Approach: Our method uses mixture prior for estimating IVIM-parameters. This prior draws statistical power from all voxels to improve the estimate of every voxel's IVIM-parameters.

Results: The proposed method calculates IVIM-parameter maps with plausible range of estimated f and D*. It improves the ability to distinguish between baseline and post-intervention perfusion changes.

Impact: To better characterize and phenotype PAD, we developed a novel method based on mixture-prior for intravascular incoherent motion (IVIM). It shows improved ability to distinguish between baseline and post-intervention images, and could facilitate the early-diagnosis of PAD and coexisting MVD.

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Keywords