Predicting when and how sediments move throughout mountain channels, however, remains challenging since onset of motion criteria and bedload transport laws have mostly been established for lowland rivers and have limited applicability to mountain environments (Schneider et al., 2016).
Hydrological response to rainfall (high hydrological connectivity Wohl, 2010) and a large mobilization of sediments (Recking, 2014). In mountain catchments, where catastrophic floods are exacerbated by a rapid Landscape and the safety of inhabited regions. They exert a major control on the intensity with which rivers can impact the Journal of Magnetic Resonance Imaging Wiley Sediment transport processes play a key role in fluvial geomorphology (Schumm, 2003) and natural risk management (Badoux et al., 2014), since Conclusion: Involuntary motion has a significant influence on T1 values acquired with IR‐FSE, but not with 3D‐SPGR in healthy volunteers. Significantly greater variability in T1 values was also noted for IR‐FSE than for 3D‐SPGR. Pairwise comparison of Δχ2 values showed a significant difference for IR‐FSE, but not for 3D‐SPGR. Results: Maximum Euclidean distance was 3.5 mm and 1.2 mm for IR‐FSE and SPGR respectively. Averages of differences in goodness of fit (Δχ2) tests and averages of relative differences in T1 values (ΔT1) before and after motion correction were computed. Displacements were expressed as averaged Euclidean distances and angles. A mutual information‐based approach was used to correct for image misregistration. Materials and Methods: Single‐slice IR‐FSE and 3D SPGR sequences were applied to perform dGEMRIC in five healthy volunteers. Purpose: To evaluate the impact of motion on T1 values acquired by using either inversion‐recovery fast spin echo (IR‐FSE) or three‐dimensional (3D) spoiled gradient recalled‐echo (SPGR) sequences for delayed gadolinium‐enhanced magnetic resonance imaging of cartilage (dGEMRIC) in volunteers. Andreisek, Gustav Luu, Sheena Cheng, Hai‐Ling Margaret Sussman, Marshall S.
Impact of motion on T1 mapping acquired with inversion recovery fast spin echo and rapid spoiled gradient recalled‐echo pulse sequences for delayed gadolinium‐enhanced MRI of cartilage (dGEMRIC) in volunteers Impact of motion on T1 mapping acquired with inversion recovery fast spin echo and rapid spoiled.
0 kommentar(er)
