Optimal Control Design of Band-Selective Excitation Pulses That Accommodate Relaxation and RF Inhomogeneity

Authors

Naum I. Gershenzon, Wright State University - Main CampusFollow
Thomas E. Skinner, Wright State University - Main CampusFollow
M. NimbalkarFollow
Steffen J. Glaser

Document Type

Article

Publication Date

4-2012

Abstract

Existing optimal control protocols for mitigating the effects of relaxation and/or RF inhomogeneity on broadband pulse performance are extended to the more difficult problem of designing robust, refocused, frequency selective excitation pulses. For the demanding case of T₁ and T₂ equal to the pulse length, anticipated signal losses can be significantly reduced while achieving nearly ideal frequency selectivity. Improvements in performance are the result of allowing residual unrefocused magnetization after applying relaxation-compensated selective excitation by optimized pulses (RC-SEBOPs). We demonstrate simple pulse sequence elements for eliminating this unwanted residual signal.

Repository Citation

Gershenzon, N. I., Skinner, T. E., Nimbalkar, M., & Glaser, S. J. (2012). Optimal Control Design of Band-Selective Excitation Pulses That Accommodate Relaxation and RF Inhomogeneity. Journal of Magnetic Resonance, 217, 53-60.
https://corescholar.libraries.wright.edu/physics/265

DOI

10.1016/j.jmr.2012.02.007