Noise Amplification in TPI-SENSE Parallel Imaging
Stenger A, Qian Y, Boada F
University of Hawaii at Manoa
Noise amplification in the TPI-SENSE imaging was investigated for a 4-element head coil array on a 3T scanner. Multiple noise trials and conjugate gradient SENSE reconstruction were used to calculate noise images for the reductions in polar (ring) and azimuthal (rotation) directions. The average standard derivation of the noise images showed that the noise amplification in the TPI-SENSE was significantly smaller than that expected for Cartesian sampling, and closely associated with the coil maps.