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Abstract #4235

Parallel Imaging Accelerated Susceptibility Imaging with No SNR Penalty

Bing Wu1, Wei Li2, Chunlei Liu2

1GE heathcare, Beijing, China; 2Brain Imaging and analysis center, Duke University

Susceptibility imaging with SPGR is a considerably long imaging process which limits its clinical feasibility. Acceleration with parallel imaging, however, degrades the SNR in the resulting susceptibility map. In this work, additional data acquisitions are made in the otherwise wasted empty echo space in front of the readout. The SNR improvement gained through multi-echo averaging has been shown to completely offset the SNR loss incurred at an acceleration factor of 4, showing visibly even better SNR than fully sampled dataset at a single TE.

Keywords

able accelerated acceleration accepted acquisition acquisitions additional adult allows although applied arrowed artifacts assessed assuming available averaging axial better bing brain calibration central channel china clinically closer coil commercial compensate completed composition considerably conventionally corresponds covering dataset deep degraded derived desirable duke echoes empty enhancement equipped even extrinsic fast feasible frame front full fully gain gained gives gradient hand head healthy implemented improved improvement in vivo incurred inserted introduce introduces lead leads long loss make mapping maps matrix moderate much noise nuclei offset original otherwise parallel penalty people post potentially processing propose proposed protocol qualitatively quantitative quantitatively ready reconstructed reconstruction reduction remove republic resolution sampled sampling scanner scanners selected sensitive sets slice space spacing spiral star starting sufficiently susceptibility table takes theory tissue turn typical unlike usually utilize variations visually volume volunteer wasted whereas white widely