Trevor Wade1,2, Charles McKenzie1,3, Brian Rutt4
1Imaging Research Laboratories, Robarts
Theoretical and experimental investigation of RF spoiling in the special case of accelerated 3D Look-Locker imaging has led to an improved value for the phase increment used in the standard RF spoiling scheme. Poor choice of phase increment leads to an inversion recovery curve that deviates significantly from the theoretical ideal, leading to an inaccurate estimate of the recovery time constant. Simulations were used to determine improved values for the phase increment based on minimizing summed squared differences, or time constant measurement accuracy. These were tested experimentally and found to be superior to previously reported values for most imaging parameters.