Power independent of number of slices (PINS) radiofrequency pulses for low-power simultaneous multislice excitation

Norris, David G., Koopmans, Peter J., Boyacioglu, Rasim and Barth, Markus (2011) Power independent of number of slices (PINS) radiofrequency pulses for low-power simultaneous multislice excitation. Magnetic Resonance in Medicine, 66 5: 1234-1240. doi:10.1002/mrm.23152


Author Norris, David G.
Koopmans, Peter J.
Boyacioglu, Rasim
Barth, Markus
Title Power independent of number of slices (PINS) radiofrequency pulses for low-power simultaneous multislice excitation
Journal name Magnetic Resonance in Medicine   Check publisher's open access policy
ISSN 0740-3194
1522-2594
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1002/mrm.23152
Volume 66
Issue 5
Start page 1234
End page 1240
Total pages 7
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Language eng
Abstract This communication describes radiofrequency pulses capable of performing spatially periodic excitation, inversion, and refocusing. The generation of such pulses either by multiplication of existing radiofrequency pulses by a Dirac comb function or by means of Fourier series expansion is described. Practical schemes for the implementation of such pulses are given, and strategies for optimizing the pulse profile at fixed pulse duration are outlined. The pulses are implemented using a spin-echo sequence. The power deposition is independent of the number of slices acquired, and hence the power deposition per slice is considerably reduced compared to multislice imaging. Excellent image quality is obtained both in phantoms and in images of the human head. These pulses should find widespread application for multiplexed imaging, in particular at high static magnetic field strengths and for pulse sequences that have a high radiofrequency power deposition and could lead to dramatic increases in scanning efficiency. Copyright
Keyword Multiplexed imaging
Radiofrequency power deposition
Radiofrequency pulses
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Advanced Imaging Publications
 
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