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A 32-channel parallel transmit system add-on for 7T MRI.
- Source :
-
PloS one [PLoS One] 2019 Sep 12; Vol. 14 (9), pp. e0222452. Date of Electronic Publication: 2019 Sep 12 (Print Publication: 2019). - Publication Year :
- 2019
-
Abstract
- Purpose: A 32-channel parallel transmit (pTx) add-on for 7 Tesla whole-body imaging is presented. First results are shown for phantom and in-vivo imaging.<br />Methods: The add-on system consists of a large number of hardware components, including modulators, amplifiers, SAR supervision, peripheral devices, a control computer, and an integrated 32-channel transmit/receive body array. B1+ maps in a phantom as well as B1+ maps and structural images in large volunteers are acquired to demonstrate the functionality of the system. EM simulations are used to ensure safe operation.<br />Results: Good agreement between simulation and experiment is shown. Phantom and in-vivo acquisitions show a field of view of up to 50 cm in z-direction. Selective excitation with 100 kHz sampling rate is possible. The add-on system does not affect the quality of the original single-channel system.<br />Conclusion: The presented 32-channel parallel transmit system shows promising performance for ultra-high field whole-body imaging.<br />Competing Interests: The authors have declared that no competing interests exist.
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 14
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 31513637
- Full Text :
- https://doi.org/10.1371/journal.pone.0222452