APPLICATIONS OF REDUCED-ENCODING MR-IMAGING WITH GENERALIZED-SERIES RECONSTRUCTION (RIGR)

The RIGR (reduced-encoding imaging by generalized-series reconstructio n) technique for magnetic resonance imaging uses a high-resolution ref erence image as the basis set for the reconstruction of subsequent ima ges acquired with a reduced number of phase-encoding steps. The techni que allows increased temporal resolution in applications requiring rep eated acquisitions, such as the dynamic imaging of contrast agent biod istribution, and in intrinsically time-consuming protocols such as the acquisition of a series of T2-weighted images. Several examples are p resented to demonstrate that a four- to eightfold improvement in spati al or temporal resolution can be achieved with this technique.