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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
Published on: November 8, 2012
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Assessment of Subject Head Motion in Diffusion MRI
Ema Topolnjak1, Chenyu Gao1, Lori L Beason-Held2
1Dept. of Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, USA.
Proceedings of Spie--The International Society for Optical Engineering
|September 2, 2024
Summary
Head motion during brain diffusion-weighted imaging (DWI) causes artifacts. Analysis of 5,380 scans reveals significant rotation and translation, particularly at the scan
Area of Science:
- Neuroimaging
- Medical Physics
Background:
- Head motion during diffusion-weighted imaging (DWI) acquisition introduces artifacts, degrading image quality.
- Understanding motion patterns is crucial for developing effective motion correction strategies.
Purpose of the Study:
- To quantify the extent and frequency of head motion (translation and rotation) during brain DWI.
- To identify specific motion patterns and their temporal evolution throughout the scan acquisition.
Main Methods:
- Analysis of 5,380 DWI scans from 1,034 participants.
- Measurement of rotations and translations in sagittal, coronal, and transverse planes relative to previous volumes.
- Comparison of different motion types and their changes over time.
Main Results:
- The largest rotation per minute occurs around the right-left axis (median 0.378 °/min).
- The largest translation per minute occurs along the anterior-posterior axis (median 1.867 mm/min).
- Movement spikes, especially anterior-posterior translation, are observed at the scan's beginning.
Conclusions:
- All analyzed DWI scans exhibit subtle head motion.
- This motion can potentially impact the accuracy of subsequent neuroimaging analyses.
- Characterizing motion is essential for improving DWI data reliability.
