Abstract #2571
Improved motion correction using interleaved b=0 volumes and b-vector correction in DTI
Benjamin R Morgan 1 , Wayne Lee 1 , and Margot J Taylor 1,2
1
Hospital for Sick Children, Toronto,
Ontario, Canada,
2
University
of Toronto, Toronto, Ontario, Canada
Diffusion imaging acquisitions are sensitive to head
motion, making the collection of a large number of
directions problematic, especially in motion-prone
populations, such as children. In this study, we propose
splitting long acquisitions into separate, shorter
acquisitions and including interleaved b=0 reference
volumes to facilitate improved motion and b-vector
correction. A novel procedure for preprocessing
motion-corrupted data collected in this manner is
introduced and compared to the standard eddy correction
algorithm. Preliminary evidence, using a series of
motion-free and motion-corrupted datasets acquired on
one healthy adult, shows an advantage to the proposed
technique in fractional anisotropy and principle
eigenvector estimation.
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