Taming an Ill-Conditioned SPIRiT: Improved Iterative Image Reconstruction for Real-Time Cardiac MRI

Samuel T. Ting¹, Yu Ding¹, Rizwan Ahmad¹, Hui Xue², Orlando P. Simonetti¹

We seek to address the ill-conditioned properties of the SPIRiT reconstruction method when applied in scenarios requiring highly accelerated acquisitions, as is the case in real-time cardiac imaging under free-breathing conditions. We show that the use of a suitable data initialization in the POCS implementation of SPIRiT can help alleviate the issues resulting from the ill-conditioned properties of SPIRiT.