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Simultaneous Multislice for Accelerating Diffusion MRI in Clinical Neuroradiology Protocols.
M J Hoch1, M Bruno2, D Pacione3
1From the Department of Radiology (M.J.H.), University of Pennsylvania, Philadelphia, Pennsylvania.
AJNR. American Journal of Neuroradiology
|May 14, 2021
Summary
Simultaneous multislice (SMS) accelerated diffusion MRI is clinically equivalent to standard acquisitions for diagnostic utility. This technique significantly reduces scan times for both routine diffusion imaging and diffusion tractography, enabling advanced applications.
Area of Science:
- Radiology
- Medical Imaging
- Neuroimaging
Background:
- Diffusion MR imaging is crucial for clinical neuroradiology.
- Simultaneous multislice (SMS) acquisitions can accelerate these sequences.
- This study evaluates the clinical equivalence of SMS-accelerated diffusion data.
Purpose of the Study:
- To test if simultaneous multislice-accelerated diffusion MRI data are clinically equivalent to standard acquisitions.
- To assess the impact of SMS acceleration on image quality, artifacts, and diagnostic utility.
- To evaluate the clinical utility of SMS-accelerated diffusion tractography.
Main Methods:
- Retrospective analysis of 25 patients before and after 2-slice SMS acceleration implementation.
- Neuroradiologist evaluation of perceived quality, artifacts, and diagnostic utility.
- Diffusion tractography in 13 patients assessed by a neurosurgeon for fidelity and utility.
Main Results:
- SMS diffusion MRI reduced acquisition time from 141 to 45 seconds (routine) and 7.5 to 5.9 minutes (tractography).
- SMS-accelerated diffusion was rated equivalent for diagnostic utility, despite minor perceived quality reductions.
- Diffusion tractography using SMS was also rated clinically equivalent, with high Dice similarity coefficients for tract volumes.
Conclusions:
- Two-slice SMS diffusion MRI is clinically equivalent for standard acquisitions and diffusion tractography.
- SMS acceleration facilitates higher resolution diffusion imaging, essential for advanced clinical applications.
- SMS diffusion MRI shows promise for improving efficiency and enabling advanced neuroimaging protocols.
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