Comparative studies on exposure conditions and reconstruction algorithms in limited angle tomography

Kwang Eun Jang; Jiyoung Choi; Jongha Lee; Younghun Sung; Jae Hak Lee; SeongDeok Lee

doi:10.1117/12.2007894

19 March 2013 Comparative studies on exposure conditions and reconstruction algorithms in limited angle tomography

Kwang Eun Jang, Jiyoung Choi, Jongha Lee, Younghun Sung, Jae Hak Lee, SeongDeok Lee

Proceedings Volume 8668, Medical Imaging 2013: Physics of Medical Imaging; 86680D (2013) https://doi.org/10.1117/12.2007894
Event: SPIE Medical Imaging, 2013, Lake Buena Vista (Orlando Area), Florida, United States

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.

Citation Download Citation

Kwang Eun Jang, Jiyoung Choi, Jongha Lee, Younghun Sung, Jae Hak Lee, and SeongDeok Lee "Comparative studies on exposure conditions and reconstruction algorithms in limited angle tomography", Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86680D (19 March 2013); https://doi.org/10.1117/12.2007894

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