Application of PINS radiofrequency pulses to reduce power deposition in RARE/turbo spin echo imaging of the human head

Norris, David G., Boyacioglu, Rasim, Schulz, Jenni, Barth, Markus and Koopmans, Peter J. (2014) Application of PINS radiofrequency pulses to reduce power deposition in RARE/turbo spin echo imaging of the human head. Magnetic Resonance in Medicine, 71 1: 44-49. doi:10.1002/mrm.24991


Author Norris, David G.
Boyacioglu, Rasim
Schulz, Jenni
Barth, Markus
Koopmans, Peter J.
Title Application of PINS radiofrequency pulses to reduce power deposition in RARE/turbo spin echo imaging of the human head
Journal name Magnetic Resonance in Medicine   Check publisher's open access policy
ISSN 0740-3194
1522-2594
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1002/mrm.24991
Volume 71
Issue 1
Start page 44
End page 49
Total pages 6
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Language eng
Formatted abstract
Purpose: To explore the use of PINS radiofrequency (RF) pulses to reduce RF power deposition in multiband/simultaneous multislice imaging with the RARE/turbo spin echo (TSE) sequence at 3T and 7T.

Methods: A PINS-TSE sequence was implemented and combined with blipped CAIPI to improve the reconstruction of superposed slices. Whole brain imaging of healthy volunteers was performed at both 3T and 7T using a 32-channel coil for signal reception.

Results: A considerable reduction in power deposition was achieved compared with a standard sequence of the manufacturer. At 3T, the reduction in specific absorption rate (SAR) made short pulse repetition times (TRs) possible, however, in order to obtain a good T2 contrast, it is advisable to maintain TR while extending the echo train length. At 7T, whole brain coverage with a spatial resolution of 1 × 1 × 2 mm3 was achieved in an acquisition time of 150 s. Furthermore, it could be shown that pulse sequences that use PINS pulses do not suffer from having additional magnetization transfer contrast.

Conclusion: PINS RF pulses combined with multiband imaging reduce SAR sufficiently to enable routine TSE imaging at 7T within clinically acceptable acquisition times. In general, the combination of multiband imaging with PINS RF pulses represents a method to reduce total RF power deposition.
Keyword 7 Tesla
multiband imaging
PINS
Radiofrequency pulses
RARE/FSE/TSE
RF power deposition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Centre for Advanced Imaging Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 19 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 20 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 20 Mar 2014, 19:21:28 EST by Ms Kate Rowe on behalf of Centre for Advanced Imaging