Optimization and Evaluation of k-Space Undersampling Strategies for Accelerated Deuterium CSI
Biomedical Engineering
Bret Ashby
Abstract
This project focuses on improving the efficiency of Deuterium Chemical Shift Imaging (CSI) by optimizing k-space undersampling strategies and reconstruction performance. Undersampling mask strategies including pseudorandom, a priori (FLASH, T1W, T2W), and a central weighted variable density mask were evaluated across multiple acceleration factors.
Reconstruction accuracy was quantified using normalized Root Mean Square Error (NRMSE) and Structural Similarity Index (SSIM) to identify mask strategies that balance acquisition speed and image fidelity.