Fei Han1 and Vibhas Deshpande2
1US MR R&D, Siemens Medical Solutions, USA, Los Angeles, CA, United States, 2US MR R&D, Siemens Medical Solutions, USA, Austin, TX, United States
1US MR R&D, Siemens Medical Solutions, USA, Los Angeles, CA, United States, 2US MR R&D, Siemens Medical Solutions, USA, Austin, TX, United States
The proposed acceleration strategy can
potentially reduce the scan time of Radial-TSE T2 mapping by half without
noticeable loss of image quality and quantification accuracy. The shortened
scan could improve the clinical applicability of free-breathing abdominal
T2 quantitative imaging.
Figure 1. In rTSE imaging, hyperintense? signals originating from
outside the imaging FOV could propagate into the imaging FOV, causing streaking
artifacts (a). In the proposed method, a mask was first generated to cover the
imaging object within the imaging FOV (b). A coil-mixing matrix was then
calculated (c), which is used to process the k-space data before
reconstruction. The streaking artifacts in both the composite images and the T2
maps could be effectively removed by the coil-mixing de-streak method (d,e).
Figure 4. The accelerated rGraSE acquisition offers
comparable image quality and T2 maps as the rTSE but takes half of the time to
acquire.