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Sparse representation-based super-resolution for diffusion weighted images

Afzali, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/ICBME.2014.7043885
  3. Abstract:
  4. Diffusion weighted imaging (DWI) is a non-invasive method for investigating the brain white matter structure. It can be used to evaluate fiber bundles in the brain. However, clinical acquisitions are often low resolution. This paper proposes a method for improving the resolution using sparse representation. In this method a non-diffusion weighted image (bO) is utilized to learn the patches and then diffusion weighted images are reconstructed based on the trained dictionary. Our method is compared with bilinear, nearest neighbor and bicubic interpolation methods. The proposed method shows improvement in terms of Peak Signal-to-Noise Ratio (PSNR) and Structural SIMilarity (SSIM)
  5. Keywords:
  6. Biomedical engineering ; Diffusion ; Noninvasive medical procedures ; Optical resolving power ; Bicubic interpolation ; Diffusion weighted images ; Diffusion weighted imaging ; Noninvasive methods ; Peak signal to noise ratio ; Sparse representation ; Structural similarity ; Super resolution ; Signal to noise ratio
  7. Source: 21st Iranian Conference on Biomedical Engineering, ICBME ; 26-28 November , 2014 , pp. 12-16 ; ISBN: 9781479974177
  8. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=7043885&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D7043885