MRI apparatus and methods

摘要

First and second MRI images are obtained with the B0 field rotated in different orientations specifically including the magic angle. The arrangement of magnets may be on a rotatable mounting such as a gimbal. This may be used to exploit different image contrast in musculoskeletal tissues such as collagen fibres. Co-registration of images based on the orientations imaged may be used. Calibration by determining field adjustments required at different orientations and shimming accordingly may be performed.