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Abstract #2434

Improved fat suppression of TSE-DWI in the head-neck using enhanced slice-selective gradient reversal (enhanced LIPO)

Daichi Murayama1, Masami Yoneyama2, Takayuki Sakai3, Iain Ball4, and Shigehiro Ochi3
1Radiology, Eastern Chiba Medical Center, Chiba, Japan, 2Philips Japan, Tokyo, Japan, 3Eastern Chiba Medical Center, Chiba, Japan, 4Philips Australia & New Zealand, North Ryde, Australia

Synopsis

Keywords: Diffusion Acquisition, Diffusion/other diffusion imaging techniques, fat suppresstion

Motivation: TSE-DWI provides distortion-free images, but it has a disadvantage in terms of its low signal-to-noise ratio (SNR). TSE-DWI basically requires several signal averages to obtain sufficient SNR, resulting in long scan time.

Goal(s): We modified and optimized the LIPO selective gradients (enhanced LIPO) to maximize the fat suppression effect for TSE-DWI in the neck, and compared with conventional methods (SPAIR TSE-DWI and LION TSE-DWI) to investigate its clinical usefulness.

Approach: SNR and CR were calculated with ROIs placed in parotid gland and fat around neck.

Results: Combining TSE-DWI with enhanced LION improves the robustness of fat suppression while maintaining better SNR.

Impact: The present findings suggest that both conventional and enhanced LION TSE-DWI showed improved SNR because it does not require fat suppression pre-pulse. Furthermore, enhanced LION further improved the robustness of fat suppression.

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Keywords