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Abstract #4035

Effects of B-Matrix Correction on Fiber Tractography in High Resolution DTI with Short-Axis Propeller EPI

Murat Aksoy1, Samantha Jane Holdsworth1, Stefan Tor Skare1,2, Roland Bammer1

1Department of Radiology, Stanford University, Stanford, CA, United States; 2Karolinska Institute, Stockholm, Sweden

Due to the prolonged acquisition time in DTI, the likelihood of patient motion increases. It is essential to correct for motion to assure the diagnostic quality and accuracy of tensor orientation in DTI. For interleaved sequences, such as Short-Axis Propeller-EPI, patient motion causes the b-matrix to vary between different parts of k-space. It was previously shown that correction of motion artifacts in this case requires non-linear methods. In this study, we investigated the effects of b-matrix correction on fiber tractography with high resolution DTI. Results showed that b-matrix correction is necessary to get accurate fiber tracts in moving subjects.