This study demonstrates the use of motion modelling and super resolution reconstruction (SRR) to produce an isotropic 3D image of the upper abdomen during free breathing.
Sagittal and coronal 6 mm 2D slices are acquired throughout the volume of interest. The slices are repeated with sub-voxel offsets to facilitate SRR. An interleaved navigator slice is also acquired.
The navigator slice is processed with non-rigid registration and principal component analysis, to give two motion surrogate signals. These signals are used to control the motion model. The motion model and the SRR are jointly optimised using an iterative scheme.