Multiphoton parallel transmission (MP‐pTx): Pulse design methods and numerical validation
John M. Drago,
Bastien Guerin,
Jason P. Stockmann
et al.
Abstract:PurposeWe propose and evaluate multiphoton parallel transmission (MP‐pTx) to mitigate flip angle inhomogeneities in high‐field MRI. MP‐pTx is an excitation method that utilizes a single, conventional birdcage coil supplemented with low‐frequency (kHz) irradiation from a multichannel shim array and/or gradient channels. SAR analysis is simplified to that of a conventional birdcage coil, because only the radiofrequency (RF) field from the birdcage coil produces significant SAR.MethodsMP‐pTx employs an off‐resona… Show more
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