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Abstract #3816

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

1The Ohio State University, Columbus, OH, United States; 2Siemens Corporate Research, Princeton, NJ, United States

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.

Keywords

acceleration achieve acquisition additional address adequately advantages allow although approaches arbitrary arrows artifact artifacts axis breathing card cardiac challenging chamber channels cine clinical computationally conditioned conditioning consistent constraints context convergence core corporate correlation diagnostic ding distinct dramatically dynamic elevated estimation evaluated example exhibits expect fast frame frames framework free full gained healthy help horizontal impact implemented improve improved improves improving in vivo incoherence incoherent indicate initialization initialized input intensive interleaved introducing issue iteration iterations iterative jersey kernel lead libraries local loss many matrix medical meet memory motion nature necessary needed offers open orientations parallel possibility precludes presence quality quantified random real reconstructed reconstruction reconstructions reduced reducing reduction regularization relevance requirements resolution sacrificing sampling scenarios schemes self series severe short significantly simplicity slice slight solution source space spatially spirit stars starting statistically still stopping taming temporal temporally terms theory thereby ting trajectory transform typical uniformly uniqueness volunteers white workstation zero