High-resolution variable-density 3D cones coronary MRA.

摘要: Purpose To improve the spatial/temporal resolution of whole-heart coronary MR angiography by developing a variable-density (VD) 3D cones acquisition suitable for image reconstruction with parallel imaging and compressed sensing techniques. Methods A VD trajectory design incorporates both radial spiral undersampling techniques to achieve higher resolution. This is used generate 0.8 mm/66 ms isotropic resolution, using similar number readouts as our previous fully sampled (1.2 mm/100 ms). Scans volunteers patients are performed evaluate performance trajectory, non-Cartesian L1-ESPIRiT high-resolution reconstruction. Results With gridding reconstruction, scans experience an expected drop in signal-to-noise contrast-to-noise ratios, but L1-ESPIRiT, apparent noise substantially reduced. Compared 1.2 mm images, each volunteer, images exhibit vessel sharpness values right left anterior descending arteries. Conclusion Coronary submillimeter spatial high temporal can be depiction arteries. Magn Reson Med 74:614–621, 2015. © 2015 Wiley Periodicals, Inc.