Technical Note: Clustering-based motion compensation scheme for multishot diffusion tensor imaging

Zhongbiao Xu, Feng Huang, Zhigang Wu, Yingjie Mei, Ha-kyu Jeong, Wenxing Fang, Zhifeng Chen, Yishi Wang, Zijing Dong, Hua Guo, Xinyuan Zhang, Wufan Chen, Qianjin Feng, Yanqiu Feng

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

Purpose: To extend image reconstruction using image-space sampling function (IRIS) to address large-scale motion in multishot diffusion-weighted imaging (DWI). Methods: A clustered IRIS (CIRIS) algorithm that would extend IRIS was proposed to correct for large-scale motion. For DWI, CIRIS initially groups the shots into clusters without intracluster large-scale motion and reconstructs each cluster by using IRIS. Then, CIRIS registers these cluster images and combines the registered images by using a weighted average to correct for voxel mismatch caused by intercluster large-scale motion. For diffusion tensor imaging (DTI), CIRIS further reduces the effect of motion on diffusion directions by treating motion-induced direction changes as additional diffusion directions. CIRIS also introduces the detection and rejection of motion-corrupted data to avoid corresponding image degradation. The proposed method was evaluated by simulation and in vivo diffusion datasets. Results: Experiments demonstrated that CIRIS can reduce motion-induced blurring and artifacts in DWI and provide more accurate DTI estimations in the presence of large-scale motion, compared with IRIS. Conclusion: The proposed method presents a novel approach to correct for large-scale in-plane motion for multishot DWI and is expected to benefit the practical application of high-resolution diffusion imaging.

Original languageEnglish
Pages (from-to)5515-5524
Number of pages10
JournalMedical Physics
Volume45
Issue number12
DOIs
Publication statusPublished - Dec 2018
Externally publishedYes

Keywords

  • clustering
  • diffusion tensor imaging
  • diffusion-weighted imaging
  • motion correction
  • multishot echo-planar imaging

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