Noise Estimation for Single-Slice Sinogram of Low-Dose X-Ray Computed Tomography Using Homogenous Patch
Joint Authors
Li, Ming
Liao, Zhiwu
Chen, Wufan
Hu, Shaoxiang
Source
Mathematical Problems in Engineering
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-09-28
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
We present a new method to estimate noise for a single-slice sinogram of low-dose CT based on the homogenous patches centered at a special pixel, called center point, which has the smallest variance among all sinogram pixels.
The homogenous patch, composed by homogenous points, is formed by the points similar to the center point using similarity sorting, similarity decreasing searching, and variance analysis in a very large neighborhood (VLN) to avoid manual selection of parameter for similarity measures.Homogenous pixels in the VLN allow us find the largest number of samples, who have the highest similarities to the center point, for noise estimation, and the noise level can be estimated according to unbiased estimation.Experimental results show that for the simulated noisy sinograms, the method proposed in this paper can obtain satisfied noise estimation results, especially for sinograms with relatively serious noises.
American Psychological Association (APA)
Liao, Zhiwu& Hu, Shaoxiang& Li, Ming& Chen, Wufan. 2011. Noise Estimation for Single-Slice Sinogram of Low-Dose X-Ray Computed Tomography Using Homogenous Patch. Mathematical Problems in Engineering،Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-1029717
Modern Language Association (MLA)
Liao, Zhiwu…[et al.]. Noise Estimation for Single-Slice Sinogram of Low-Dose X-Ray Computed Tomography Using Homogenous Patch. Mathematical Problems in Engineering No. 2012 (2012), pp.1-16.
https://search.emarefa.net/detail/BIM-1029717
American Medical Association (AMA)
Liao, Zhiwu& Hu, Shaoxiang& Li, Ming& Chen, Wufan. Noise Estimation for Single-Slice Sinogram of Low-Dose X-Ray Computed Tomography Using Homogenous Patch. Mathematical Problems in Engineering. 2011. Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-1029717
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1029717