1. Anisotropic Super Resolution In Prostate Mri Using Super Resolution Generative Adversarial Networks
- Author
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Rewa Sood and Mirabela Rusu
- Subjects
FOS: Computer and information sciences ,Structural similarity ,Computer science ,Computer Vision and Pattern Recognition (cs.CV) ,Computer Science - Computer Vision and Pattern Recognition ,030218 nuclear medicine & medical imaging ,Image (mathematics) ,03 medical and health sciences ,0302 clinical medicine ,FOS: Electrical engineering, electronic engineering, information engineering ,medicine ,Computer vision ,Anisotropy ,medicine.diagnostic_test ,business.industry ,Image and Video Processing (eess.IV) ,Isotropy ,Resolution (electron density) ,Process (computing) ,Magnetic resonance imaging ,Electrical Engineering and Systems Science - Image and Video Processing ,Superresolution ,Computer Science::Computer Vision and Pattern Recognition ,Bicubic interpolation ,Artificial intelligence ,Enhanced Data Rates for GSM Evolution ,business ,030217 neurology & neurosurgery - Abstract
Acquiring High Resolution (HR) Magnetic Resonance (MR) images requires the patient to remain still for long periods of time, which causes patient discomfort and increases the probability of motion induced image artifacts. A possible solution is to acquire low resolution (LR) images and to process them with the Super Resolution Generative Adversarial Network (SRGAN) to create a super-resolved version. This work applies SRGAN to MR images of the prostate and performs three experiments. The first experiment explores improving the in-plane MR image resolution by factors of 4 and 8, and shows that, while the PSNR and SSIM (Structural SIMilarity) metrics are lower than the isotropic bicubic interpolation baseline, the SRGAN is able to create images that have high edge fidelity. The second experiment explores anisotropic super-resolution via synthetic images, in that the input images to the network are anisotropically downsampled versions of HR images. This experiment demonstrates the ability of the modified SRGAN to perform anisotropic super-resolution, with quantitative image metrics that are comparable to those of the anisotropic bicubic interpolation baseline. Finally, the third experiment applies a modified version of the SRGAN to super-resolve anisotropic images obtained from the through-plane slices of the volumetric MR data. The output super-resolved images contain a significant amount of high frequency information that make them visually close to their HR counterparts. Overall, the promising results from each experiment show that super-resolution for MR images is a successful technique and that producing isotropic MR image volumes from anisotropic slices is an achievable goal., International Symposium on Biomedical Imaging, 4 pages, 4 figures, 1 table
- Published
- 2019