Sparse angular CT projection onto convex set reconstruction using nonlocal means iterative modification / 南方医科大学学报
Journal of Southern Medical University
; (12): 2224-2228, 2010.
Article
in Zh
| WPRIM
| ID: wpr-323697
Responsible library:
WPRO
ABSTRACT
Based on the fact that nonlocal means (NL-means) filtered image can likely produce an acceptable priori solution, we propose a sparse angular CT projection onto convex set (POCS) reconstruction using NL-means iterative modification. The new reconstruction scheme consists of two components, POCS and NL-means filter. In each phase of the sparse angular CT iterative reconstruction, we first used POCS algorithm to meet the identity and non-negativity of projection data, and then performed NL-means filter to the image obtained by POCS method for image quality improvement. Simulation experiments showed that the proposed POCS scheme can significantly improve the quality of sparse angular CT image by suppressing the noise and removing the streak-artifacts.
Full text:
1
Index:
WPRIM
Main subject:
Algorithms
/
Image Processing, Computer-Assisted
/
Tomography, X-Ray Computed
/
Methods
Language:
Zh
Journal:
Journal of Southern Medical University
Year:
2010
Type:
Article