biostudies-literatureUnknown88(4)Versteeg E<h4>Purpose</h4>To characterize the acceleration capabilities of a silent head insert gradient axis that operates at the inaudible frequency of 20 kHz and a maximum gradient amplitude of 40 mT/m without inducing peripheral nerve stimulation.<h4>Methods</h4>The silent gradient axis' acquisitions feature an oscillating gradient in the phase-encoding direction that is played out on top of a cartesian readout, similarly as done in Wave-CAIPI. The additional spatial encoding fills k-space in readout lanes allowing for the acquisition of fewer phase-encoding steps without increasing aliasing artifacts. Fully sampled 2D gradient echo datasets were acquired both with and without the silent readout. All scans were retrospectively undersampled (acceleration factors R = 1 to 12) to compare conventionMagnetic resonance in medicine1785-1793https://www.ebi.ac.uk/biostudies/studies/S-EPMC9544176biostudies-literatureAccelerating Brain Imaging Using a Silent Spatial Encoding Axis.PMC9544176Klomp DWJVersteeg ESiero JCWfalseAccelerating Brain Imaging Using a Silent Spatial Encoding Axis.<h4>Purpose</h4>To characterize the acceleration capabilities of a silent head insert gradient axis that operates at the inaudible frequency of 20 kHz and a maximum gradient amplitude of 40 mT/m without inducing peripheral nerve stimulation.<h4>Methods</h4>The silent gradient axis' acquisitions feature an oscillating gradient in the phase-encoding direction that is played out on top of a cartesian readout, similarly as done in Wave-CAIPI. The additional spatial encoding fills k-space in readout lanes allowing for the acquisition of fewer phase-encoding steps without increasing aliasing artifacts. Fully sampled 2D gradient echo datasets were acquired both with and without the silent readout. All scans were retrospectively undersampled (acceleration factors R = 1 to 12) to compare convention2022-01-01T00:00:00Z2022 Oct2025-04-19T04:50:04.45Z2025-04-19T04:50:04.45ZS-EPMC95441763569654010.1002/mrm.29350