We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Accelerated multislice MRI with patterned excitation.
- Authors
de Zwart, Jacco A.; van Gelderen, Peter; Wang, Yicun; Duyn, Jeff H.
- Abstract
Purpose: Accelerate multislice 2D MRI by using RF pulses that simultaneously act on different slices to combine contrast preparation and image acquisition. Theory and Methods: MRI applications often require the use of multiple RF pulses to generate desired contrast and prepare the signal for readout. Examples are the use of inversion prepulses to generate T1 contrast, or the use of spin‐echo preparations to generate T2 or diffusion contrast. In multislice MRI, this separation of contrast preparation and readout can render scans time‐inefficient and lengthy. We introduce a class of pulse sequences that overcomes this inefficiency by combining contrast preparation and signal readout. This is accomplished by using RF pulses that manipulate the magnetization of multiple slices simultaneously and a gradient crusher scheme that selects a target slice for readout. Results: Feasibility of the method was demonstrated for spin echo–based measurement of water diffusion and tissue pulsation in human brain at 3 T. Increases in time‐efficiency and reductions in scan time were highly dependent on specific implementation and reached as high as 25% and 53%, respectively. Conclusion: A novel approach to multislice MRI is demonstrated that reduces scan time for specific applications.
- Subjects
MAGNETIC resonance imaging; DIFFUSION measurements
- Publication
Magnetic Resonance in Medicine, 2024, Vol 91, Issue 1, p252
- ISSN
0740-3194
- Publication type
Article
- DOI
10.1002/mrm.29850