Three-dimensional Super-Resolution Technique for Whole-Heart Coronary MRA by Utilizing Graphical Processing Unit

A 3D SR technique was developed to improve image resolution and quality of whole-heart coronary MRA (WHCMRA) by utilizing GPUs. WHCMRA images with 0.6x0.6x0.75 mm resolution were reconstructed from the down-sampled WHCMRA images (1.2x1.2x1.5 mm) by using 3D SR technique, 2D SR technique and 3D bicubic interpolation. The computational time with 3D SR technique per patient considerably reduced from 4 h and 41.1 min to 45.5 min by the parallel implementation in GPUs. Root mean square error, structural similarity index and signal-to-noise ratio for 3D SR technique were 2.85, 0.984 and 65.8, being significantly greater than those for other two methods. The 3D SR approach would improve the diagnostic performance of WHCMRA for detection of stenosis.

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