Anisotropic 3D Radial Sampling for Ultrashort TE Imaging
Brnert P, Rahmer J
Philips Research Laboratories
3D radial free-induction-decay sampling schemes are used in ultrashort TE imaging. These techniques sample a spherical k space volume with isotropic angular resolution, leading to rather long scan durations and large amounts of acquired data. For prolate objects, the number of radial projections can be reduced by angular undersampling in one direction, with only negligible loss in image quality. For this anisotropic sampling pattern, the 3D radial point-spread function is calculated, and phantom as well as in-vivo scans are presented. Depending on object shape, reductions in scan duration of 25 % or more are possible.