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Proceedings Paper

Comparative studies on exposure conditions and reconstruction algorithms in limited angle tomography
Author(s): Kwang Eun Jang; Jiyoung Choi; Jongha Lee; Younghun Sung; Jae Hak Lee; SeongDeok Lee
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Paper Abstract

Digital breast tomosynthesis (DBT) has been investigated as a promising alternative to conventional X-ray mammography for breast cancer screening. By reconstructing 3D volumetric images from multiple 2D projections measured over a limited angular range, it can offer depth-directional information and improve both sensitivity and specificity of cancer detection in dense breasts. The diagnostic performance of DBT can be affected by a number of imaging parameters. The angular range of scan orbit is one of the most crucial factors, since it determines the depth-directional resolution. Recently, we proposed the wide angle tomosynthesis based on voltage modulations of X-ray source. By using X-rays with large penetration power on exterior positions, it can acquire high-SNR projections over a wide angular range. In this paper, we present comparative studies on exposure conditions in DBT, including narrow and wide angle scan using an invariant tube voltage of X-ray source, and wide angle scan with the voltage modulation technique. In addition, we compared the conventional reconstruction methods with recently proposed IDIR algorithms. In preliminary studies, the wide-angle scheme with proposed IDIR algorithm showed superior performances in detecting abnormal lesions over conventional approaches.

Paper Details

Date Published: 19 March 2013
PDF: 6 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86680D (19 March 2013); doi: 10.1117/12.2007894
Show Author Affiliations
Kwang Eun Jang, Samsung Advanced Institute of Technology (Korea, Republic of)
Jiyoung Choi, Samsung Advanced Institute of Technology (Korea, Republic of)
Jongha Lee, Samsung Advanced Institute of Technology (Korea, Republic of)
Younghun Sung, Samsung Advanced Institute of Technology (Korea, Republic of)
Jae Hak Lee, Samsung Advanced Institute of Technology (Korea, Republic of)
SeongDeok Lee, Samsung Advanced Institute of Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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