Our main purpose was to quantify geometric image distortion due to reduced susceptibility at 0.55T compared to 1.5T. Therefore, Bloch simulations of a digital phantom and a 2D GRE sequence were performed. The simulations at both field strengths were calculated twice: once without considering B0 susceptibility, and once considering B0 susceptibility artefacts. Additionally, 3D T2 SPACE images with high readout bandwidth as well as echo-planar diffusion-weighted images were obtained and compared in n=3 volunteers. Less geometric distortion due to B0 susceptibility artefacts was observed at 0.55T compared to higher field strengths.
This abstract and the presentation materials are available to members only; a login is required.