Pure Phase Encoding Acquisition for Calibration of High Geometric Fidelity Intervention Applications

Sjoerd Crijns¹, Bas Raaymakers¹, Jan Lagendijk¹

In MR-guided interventions in general and MR-guided radiotherapy in particular benefit from accurate definition of a connection between the treatment and imaging coordinate systems. This connection can be made using pure phase encoded imaging; the inherently long acquisition times of this method can be reduced by random under-sampling and subsequent iterative reconstruction. It is shown here that using this approach accelerated acquisition is possible of images with high geometric fidelity.