Minimal-SAR RF Pulse Optimization for Parallel Transmission in MRI Conference Paper

abstract

• Parallel transmission is an emerging technique to achieve multi-dimensional spatially selective or modulated excitation in Magnetic Resonance Imaging (MRI). Minimizing Specific Absorption Ratio (SAR) is a critical issue in this technique for radio frequency power absorption safety. In this paper, we presented an automatic design method to minimize SAR in an optimization framework. The RF pulses and corresponding k-space trajectory are iteratively adjusted. The method is verified using computer simulations of a 4-channel parallel transmission system. The results showed significantly reduction in SAR can be achieved while the quality of the excited pattern is well preserved without enlonging the pulse duration. 2008 IEEE.

name of conference

• 2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

authors

• Ji, Jim

published proceedings

• 2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Vols 1-8

author list (cited authors)

• Liu, Y., & Ji, J. X.

citation count

• 7

complete list of authors

• Liu, Yinan||Ji, Jim X

publication date

• January 2008

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference  Journal

keywords

• Biomedical Imaging
• Computer-Aided Design
• Equipment Design
• Equipment Failure Analysis
• Image Enhancement
• Magnetic Resonance Imaging
• Magnetics
• Reproducibility Of Results
• Sensitivity And Specificity
• Signal Processing, Computer-Assisted
• Transducers

Digital Object Identifier (DOI)

• 10.1109/iembs.2008.4650526

International Standard Book Number (ISBN) 13

• 978-1-4244-1814-5

start page

• 5774

end page

• 5777

volume

• 2008