Mbirn: DTI distortion correction (post-acquisition)

GOALS

• May - October 2005 (S. Mori)
  • We'll publish this tool. Manuscript should be ready by October / 2005.

---

---

UPDATES

• Progress for October 2004 - May 2005 (S. Mori)
  • Allen and Anders are working on EPI-B0 distortion correction based on phase measurements.
  • Our goal is to develop a tool that can be applied to existing data which don't have phase map and can't be corrected by the phase-map approach. Also, the phase-map approach for parallel imaging is not yet available, I think. Thus, our goal is to develop a tool for:
    • Measurement of distortion, which can be used to label badly distorted areas for subsequent data analysis, especially for morphological studies.
    • Correction of distortion
  • This tool assumes data are acquired by parallel imaging, in which distortion is not severe in most regions.
    • This approach should be able to correct low-frequency distortion fairly well (Fig. 1).
    • High frequency distortion could be difficult to correct but it can at least label such areas (Fig. 2).
    • This is time-consuming approach (1-2 hours / data).
  • We finished our initial studies and calculated average distortion maps (Fig. 1 and 2).
  • We are currently working on user-front interface to make this tool available.

---