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Abstract #1460

Reduced-FOV Lumbar Spine T 1 MR Imaging Using High-Low EP-2DRF Excitation Pulse

Qinwei Zhang 1 , Yi-Xiang J Wang 1 , Heather Ting Ma 2 , Queenie Chan 3 , and Jing Yuan 1,4

1 Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, 2 Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong, China, 3 Philips Healthcare, Hong Kong, Hong Kong, 4 CUHK Shenzhen Research Institute, Shenzhen, Guangdong, China

T1ρ imaging has been proved to be a sensitive biomarker for disc degeneration while suffering from long scan time. Large field of view and respiratory motion further adversely affect the mapping results. We proposed a 2DRF pulse with novel high-low EP excitation trajectory to realize reduced field of view (rFOV) T1ρ imaging in lumbar spine region on a 3T clinical scanner. The scan time was halved and motion artifact was eliminated. Good consistency between rFOV and full FOV T1ρ maps was observed. The proposed 2DRF has potential to be used for high-resolution spine T1ρ imaging in routine clinical scan.

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