Technical Program

Paper Detail

Paper:	SA-AM-OS1.8
Session:	MRI Acquisition and Reconstruction
Time:	Saturday, April 8, 12:10 - 12:30
Presentation:	Oral
Title:	Highly Accelerated Parallel Imaging Methods for Localized Massive Array Coils: Comparision Using 64-Channel Phased-Array Data
Authors:	Jim Ji; Texas A&M University
	Jong Bum Son; Texas A&M University
	Mary McDougall; Texas A&M University
	Steven Wright; Texas A&M University
Abstract:	Massive parallel phased-array systems with 32, 64, or more receive channels have potential to achieve high scan time saving for parallel MRI. In the past decade, a number of parallel MRI methods have been proposed including SENSE, SMASH, PILS, GRAPPA, SPACE-RIP, SEA, and other methods. In this work, we investigate the optimality of four reconstruction methods for parallel imaging with massive localized linear phased-array coils. In particular, the artifact power, SNR, and scan efficiency of different methods are systematically compared and analyzed. The studies are based on real MR data collected using a 64-channel system for 2-D MR imaging. The results show that the auto-PILS method and the improved GRAPPA method provide the best SNR and minimal artifact. In addition, the auto-PILS method is most efficient in scan time reduction. Interestingly, SMASH is not optimal for use with the highly localized coils with coil width on the same order as the voxel size.

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