title: |B1(+)|-selective excitation pulse design using the Shinnar-Le Roux algorithm.
abstract: A new mathematical treatment and algorithm for the design of |B1(+)|-selective RF excitation pulses is presented and validated. The algorithm is based on a rotated Shinnar-Le Roux pulse design algorithm, wherein the pulse's frequency modulation waveform is directly designed by the algorithm, and its amplitude and sign modulation waveform takes the place of the gradient field. A new pulse configuration is described that enables excitation of large tip-angle slice-selective profiles. Experiments were performed to validate the pulses, and simulations were performed to characterize the pulses' sensitivity to off-resonance, and to compare them to adiabatic (BIR-4) pulses.
authors.affiliation: Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA; Vanderbilt University Institute of Imaging Science, Nashville, TN, USA. Electronic address: will.grissom@vanderbilt.edu.
authors.forename: William A
authors.initials: WA
authors.lastname: Grissom
authors.affiliation: Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Vanderbilt University Institute of Imaging Science, Nashville, TN, USA. Electronic address: zhipeng.cao@vanderbilt.edu.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Cao
authors.affiliation: Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA; Vanderbilt University Institute of Imaging Science, Nashville, TN, USA. Electronic address: mark.does@vanderbilt.edu.
authors.forename: Mark D
authors.initials: MD
authors.lastname: Does
keywords: RF pulse design; Rotating Frame Selective Excitation; Selective excitation; Shinnar–Le Roux algorithm