View source for Mbirn: DTI distortion correction (post-acquisition)

'''GOALS'''

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

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<br />'''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.

[[Image:Mbirn_Mori_summaryMay2005.jpg|[[Image:Mbirn_Mori_summaryMay2005.jpg| Figures 5 and 6]]]]

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