An analysis of RF pulse apodization in parallel spatially selective excitation

Yinan Liu, Jim Ji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents an analysis of the effect of RF apodization for parallel spatially selective excitation in MRI. Using the small tip-angle approximation and the k-space interpretation, the analysis shows that for multidimensional multi-channel parallel excitation, limited RF pulse duration can lead to ringing excitation artifacts, similar to the truncation artifacts. Proper weighting of RF pulses can significantly reduce these artifacts, which is important for restricting field of excitation with minimal side lobes. Simulation results using a four-channel system in 1-D and 2-D experiments were shown to verify the analysis.

Original languageEnglish
Title of host publication28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06
Pages276-280
Number of pages5
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06 - New York, NY, United States
Duration: 30 Aug 20063 Sep 2006

Other

Other28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06
CountryUnited States
CityNew York, NY
Period30/8/063/9/06

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ASJC Scopus subject areas

  • Bioengineering

Cite this

Liu, Y., & Ji, J. (2006). An analysis of RF pulse apodization in parallel spatially selective excitation. In 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06 (pp. 276-280). [4029729] https://doi.org/10.1109/IEMBS.2006.259831