We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Feasibility of interleaved multislice averaged magnetization inversion‐recovery acquisitions of the spinal cord.
- Authors
Weigel, Matthias; Celicanin, Zarko; Haas, Tanja; Bieri, Oliver
- Abstract
Purpose: To establish an interleaved multislice variant of the averaged magnetization inversion‐recovery acquisitions (AMIRA) approach for 2D spinal cord imaging with increased acquisition efficiency compared with the conventional 2D single‐slice approach(es), and to determine essential prerequisites for a working interleaved multislice AMIRA approach in practice. Methods: The general AMIRA concept is based on an inversion recovery–prepared, segmented, and time‐limited cine balanced SSFP sequence, generating images of different contrast. For AMIRA imaging of multiple, independent slices in a 2D interleaved fashion, a slice loop within the acquisition loops was programmed. The former non‐selective inversions were replaced with slice‐selective inversions with user‐definable slice thickness. Results: The thickness of the slice‐selective inversion in 2D interleaved multislice AMIRA should be doubled compared with the manufacturer's standard setting to avoid an increased sensitivity to flow and pulsation effects particularly in the CSF. However, this solution also limits its practical applicability, as slices located at directly adjacent vertebrae cannot be imaged together. Successful interleaved two‐slice AMIRA imaging for a "reference" in vivo protocol with 0.50 × 0.50 mm2 in‐plane resolution and 8‐mm slice thickness is demonstrated, therefore halving its acquisition time per slice from 3 min down to 1.5 min. Conclusion: The investigated 2D interleaved two‐slice AMIRA variant facilitates spinal cord imaging that maintains similar contrast and the same resolution as the conventional 2D single‐slice AMIRA approach, but does so with a halved acquisition time.
- Subjects
SPINAL cord; MAGNETIZATION; VERTEBRAE; MANUFACTURING industries
- Publication
Magnetic Resonance in Medicine, 2024, Vol 92, Issue 6, p2588
- ISSN
0740-3194
- Publication type
Academic Journal
- DOI
10.1002/mrm.30223