Journal article

Spin Lock Adiabatic Correction (SLAC) for B-1-insensitive pulse design at 7T

Edward M Green, Yasmin Blunck, Bahman Tahayori, Peter M Farrell, James C Korte, Leigh A Johnston

Journal of Magnetic Resonance | Elsevier | Published : 2019

Abstract

A new framework for B1 insensitive adiabatic pulse design is proposed, denoted Spin Lock Adiabatic Correction (SLAC), which counteracts deviations from ideal behaviour through inclusion of an additional correction component during pulse design. SLAC pulses are theoretically derived, then applied to the design of enhanced BIR-4 and hyperbolic secant pulses to demonstrate practical utility of the new pulses. At 7T, SLAC pulses are shown to improve the flip angle homogeneity compared to a standard adiabatic pulse with validation in both simulations and phantom experiments, under SAR equivalent experimental conditions. The SLAC framework can be applied to any arbitrary adiabatic pulse to deliver..

View full abstract