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KMID : 1151820160100040279
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Journal of the Korean Society of Radiology
2016 Volume.10 No. 4 p.279 ~ p.284
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The Study on Reduction of Image Distortion by using Single-Shot Turbo Spin Echo in Brain Stem Diffusion MRI
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Choi Kwan-Woo
Lee Ho-Beom
Na Sa-Ra
Yoo Beong-Gyu
Son Soon-Yong
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Abstract
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Single-shot echo planar imaging(SS-EPI) is well established as high sensitivity for ischemic stroke. However, it is prone to susceptibility artifact in brain stem that diminish the image quality. single-shot turbo spin echo(SS-TSE) is a new DWI technique that can reduce susceptibility artifact. Thus, this research was conducted so as to reduce geometric distortion in brain stem by using single-shot turbo spin echo technique. Thirty patients without brain disease underwent diffusion MR on a 3T scanner with SS-EPI and SS-TSE. Obtained images with both sequences were analyzed for geometric distortion and error percentage as well. Image quality in terms of geometric distortion of SS-TSE were found to be significantly better than those for SS-EPI. And error percentage was considerably reduced for 2.4% of b0 image(from 11.1% to 8.7%), 1.2% of b1000 image(from 11.4% to 10.1%), respectively. In summary, diffusion MR using SS-TSE significantly reduce geometric distortion compared to SS-EPI in brain stem and may provide improved diagnostic performance.
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KEYWORD
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Distortion, Diffusion weighted image(DWI), Single-shot turbo spin echo(SS-TSE), Single-shot echo planar imaging(SS-EPI), Susceptibility
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