Time-Resolved 3D MR Angiography by Interleaved Biplane Projections

Time-resolved MR angiography has been the subject of great interest recently. Undersampled PR-TRICKS (1) and interleaved spiral sampling (2) are able to produce 3D data sets at a high temporal rate (2-4 s/3D). Therefore, difficulties associated with contrast timing are avoided, and pathological information can potentially be observed. However, these techniques are not without limitations. Due to the sliding window reconstructions, temporal information is smoothed. Therefore, rapid signal changes are not expected to be captured well. Furthermore, the undersampling of high-resolution data both spatially and temporally introduces concerns about th