CT image reconstruction from sparse projections using adaptive total generalised variation with soft thresholding Online publication date: Tue, 06-Jul-2021
by Vibha Tiwari; Prashant P. Bansod; Abhay Kumar
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 36, No. 1, 2021
Abstract: CT imaging plays a vital role in non-invasive diagnosis and in surgical planning of critical diseases. It is essential to reduce radiation dose during CT imaging as excessive exposure may cause harm to human tissues. To reduce radiation dose, CT image is acquired using limited number of X-ray projections and then to reconstruct the image an adaptive total generalised variation (TGV) minimisation method has been proposed. The simulation results have been compared with the existing TV, TGV and TGV with hard thresholding methods. Typically two types of noises, Gaussian and Poisson distributed noises, are introduced during CT imaging process. So, these two types of noises have been added in measured samples. It is found that after applying soft thresholding and FISTA algorithm with the proposed method, better results have been obtained in noisy imaging environment. The reconstructed CT image quality has been compared using parameters like FSSIM, PSNR, NRMSE and MAE.
Online publication date: Tue, 06-Jul-2021
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Biomedical Engineering and Technology (IJBET):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email email@example.com