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Digital tomosynthesis (DTS) with a Circular X-ray tube: Its image reconstruction based on total-variation minimization and the image characteristics

Authors
 Y. O. Park  ;  D. K. Hong  ;  Hyosung Cho  ;  U. K. Je  ;  J. E. Oh  ;  M. S. Lee  ;  H.J. Kim  ;  S.-H. Lee  ;  W. S. Jang  ;  H. M. Cho  ;  S. I. Choi  ;  Y. S. Koo 
Citation
 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, Vol.63(5) : 1060-1065, 2013 
Journal Title
 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 
ISSN
 0374-4884 
Issue Date
2013
Keywords
Digital tomosynthesis ; Circular X-ray tube ; Total variation ; Low dose
Abstract
In this paper, we introduce an effective imaging system for digital tomosynthesis (DTS) with a circular X-ray tube, the so-called circular-DTS (CDTS) system, and its image reconstruction algorithm based on the total-variation (TV) minimization method for low-dose, high-accuracy X-ray imaging. Here, the X-ray tube is equipped with a series of cathodes distributed around a rotating anode, and the detector remains stationary throughout the image acquisition. We considered a TV-based reconstruction algorithm that exploited the sparsity of the image with substantially high image accuracy. We implemented the algorithm for the CDTS geometry and successfully reconstructed images of high accuracy. The image characteristics were investigated quantitatively by using some figures of merit, including the universal-quality index (UQI) and the depth resolution. For selected tomographic angles of 20, 40, and 60◦, the corresponding UQI values in the tomographic view were estimated to be about 0.94, 0.97, and 0.98, and the depth resolutions were about 4.6,3.1, and 1.2 voxels in full width at half maximum (FWHM), respectively. We expect the proposed method to be applicable to developing a next-generation dental or breast X-ray imaging system.
Full Text
https://link.springer.com/article/10.3938/jkps.63.1060
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
Yonsei Authors
Chang, Won Seok(장원석) ORCID logo https://orcid.org/0000-0002-4925-3549
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/158470
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