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Abstract #1306

Accelerated Carotid Imaging Using Slice GRAPPA (SGRAPPA)

Xinwei Shi1, Xiao Wang2, Feng Huang3, Kui Ying4, Chun Yuan5

1Department of Biomedical Engineering, Tsinghua University, Beijing, China; 2Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States; 3Philips Healthcare, Gainesville, FL, United States; 4Department of Engineering Physics, Tsinghua University, Beijing, China; 5Department of Radiology, University of Washington, Seattle, WA, United States

In this work, a new method named slice GRAPPA (sGRAPPA) is proposed for accelerating carotid imaging which used to be challenging for traditional fast imaging techniques due to its low SNR in region of interest. sGRAPPA utilizes k-space data correlation in slice dimension as well as phase encoding dimension, and provides better preserved SNR and improved structure similarity than traditionally used GRAPPA in phantom and in-vivo experiments.

Keywords

accelerated accelerating accurate acquisition adjacent adopted applied arteries aspects assessing auto best better biomedical calibration called carotid channel china circulation close coil coils combined comparing coverage cross deep denotes density depiction designed diagnosis dimension dimensional encoding energy engineering enhanced error especially evaluate evaluation every examples experiment experimental expression fact frequency fully general idea important improved in vivo index indexes indicate interleaved interpolate interpolated interpolation introduces lesions limitation location locations long manually maps matrix missing modified narrow nature noise objection often patient pattern performance phantom physics plaque preservation preserved preserves promote proposed prospective quality quantification radiology reconstructed reconstruction reduce reduction represents root routinely sampled sampling scanner school sense several severe sharing similarity since slice slices space speed spin square squares star structural structure subjective superior suppression surrounding system table theory trajectory turbo utilize variable visual volunteer water west yuan zoom