Improved total-variation noise-reduction technique with gradient method using iteration counter and its application in medical diagnostic chest and abdominal X-ray imaging
- Authors
- Lee, Youngjin
- Issue Date
- 2018
- Publisher
- ELSEVIER GMBH, URBAN & FISCHER VERLAG
- Keywords
- Noise-reduction technique; Total-variation approach; Improved total-variation with gradient method; Quantitative evaluation of image performance; Diagnostic X-ray imaging
- Citation
- OPTIK, v.170, pp.475 - 483
- Journal Title
- OPTIK
- Volume
- 170
- Start Page
- 475
- End Page
- 483
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5253
- DOI
- 10.1016/j.ijleo.2018.06.004
- ISSN
- 0030-4026
- Abstract
- The development of novel noise-reduction algorithms is one of the main research areas in the field of medical diagnostic X-ray imaging. The purpose of this study is to develop an improved total-variation (TV) noise-reduction technique using a gradient method that employs an iteration counter, and confirm its feasibility for applications in chest and abdominal X-ray imaging systems. We evaluated image qualities using contrast-to-noise ratio (CNR) and relative standard deviation (RSD) calculations with the proposed and conventional noise-reduction algorithms for both chest and abdominal X-ray images. The results of the quantitative CNR and RSD evaluations demonstrated the superiority of the proposed TV noise-reduction technique over other algorithms; in particular, the comparison between the conventional and proposed TV techniques revealed that the proposed method has improved noise-reduction characteristics in all cases. In conclusion, the results demonstrated that the improved TV noise-reduction technique with the gradient method using the iteration counter can be used to acquire images with a better quality than those of conventional algorithms. This can lead to lowering of the radiation dose in chest and abdominal X-ray imaging systems.
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