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Abstract #3990

Diffusion-weighted MRI of rectal cancers: Utility of reduced FOV single-shot EPI with tilted 2D RF excitation pulses

Atsuo Inoue1, Masahiro Tanabe1, Kenichiro Ihara1, Keiko Hideura1, Thomas Benkert2, Hiroshi Imai3, Masatoshi Yamane4, Takahiro Yamaguchi4, Mayumi Higashi1, and Katsuyoshi Ito1
1Department of Radiology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan, 2MR Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany, 3MR Research and Collaboration, Siemens Healthcare K.K., Tokyo, Japan, 4Department of Radiological Technology, Yamaguchi University Hospital, Yamaguchi, Japan

Synopsis

Keywords: Pelvis, Diffusion/other diffusion imaging techniques, RectumThis study evaluated the image quality of reduced FOV DWI using 2D spatially-selective RF pulses with tilted excitation plane (tilted r-DWI) for rectal cancer compared with full-FOV DWI (f-DWI) using readout segmented echo-planar imaging (RS-EPI). Two radiologists evaluated the MR images, and SNR, CNR, and ADC values of the rectal lesions were quantitatively evaluated. All image quality scores and CNR were significantly higher in tilted r-DWI than in f-DWI with RS-EPI. SNR and ADC values showed no significant deference between them. Tilted r-DWI provides better image quality with less artifacts and higher rectal lesion conspicuity than f-DWI with RS-EPI.

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