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• W2955548093 abstract "Purpose The widely used single‐shot EPI (SS‐EPI) diffusion tensor imaging (DTI) suffers from strong image distortion due to B 0 inhomogeneity, especially for high‐resolution imaging. Traditional methods such as the field‐mapping method and the top‐up method have various deficiencies in high‐resolution SS‐EPI DTI distortion correction. This study aims to propose a robust distortion correction approach, which combines the advantages of traditional methods and overcomes their deficiencies, for high‐resolution SS‐EPI DTI. Methods The proposed correction method is based on the echo planar spectroscopic imaging field‐mapping followed by an intensity correction procedure. To evaluate the efficacy of distortion correction, the proposed method was compared with the conventional field‐mapping method and the top‐up method, using a newly developed quantitative evaluation framework. The correction results were also compared with multi‐shot EPI DTI to investigate whether the proposed method can provide high‐resolution SS‐EPI DTI with high geometric fidelity and high time efficiency. Results The results show that accurate field‐mapping and intensity correction are critical to distortion correction in high‐resolution SS‐EPI DTI. The proposed method can provide more precise field maps and better correction results than the other two methods ( p < 0.0001), and the corrected images show higher geometric fidelity than those from MS‐EPI DTI. Conclusion An effective method is proposed to reduce image distortion in high‐resolution SS‐EPI DTI. It is practical to achieve high‐resolution DTI with high time efficiency and high structure accuracy using this method." @default.
• W2955548093 created "2019-07-12" @default.
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• W2955548093 date "2019-07-04" @default.
• W2955548093 modified "2023-10-18" @default.
• W2955548093 title "Distortion correction for high‐resolution single‐shot EPI DTI using a modified field‐mapping method" @default.
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• W2955548093 doi "https://doi.org/10.1002/nbm.4124" @default.
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