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

David G. Norris*, Peter J. Koopmans, Rasim Boyacioǧlu, Markus Barth

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

91 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1234-1240
Number of pages7
JournalMagnetic resonance in medicine
Volume66
Issue number5
Early online date29 Aug 2011
DOIs
Publication statusPublished - 1 Nov 2011

Keywords

  • multiplexed imaging
  • radiofrequency power deposition
  • radiofrequency pulses

Fingerprint Dive into the research topics of 'Power independent of number of slices (PINS) radiofrequency pulses for low-power simultaneous multislice excitation'. Together they form a unique fingerprint.

Cite this