Magnetic Resonance Imaging Group
Prof. Elfar Adalsteinsson
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Parallel RF Excitation - Magnetic Resonance Imaging Group


RF excitation in the presence of time-varying gradients for multi-dimensional selective excitation offers several interesting applications, including flexibly shaped excitation volumes, and spatial modulation of the B1 excitation profile to mitigate RF field inhomogeneity at high field. Due to limitations on gradient hardware and RF power, such pulse designs can result in long waveforms that may limit their performance and practical applicability. Using parallel excitation design in conjunction with coil arrays capable of simultaneous, independent RF transmission, the pulse duration can be shortened by taking advantage of variations in spatial excitation profiles among coils in the array.