Attenuation compensation in mesh-domain OSEM SPECT reconstruction

Levon Vogelsang; Yao Lu; Bo Yu; Andrzej Krol; Yuesheng Xu; Xiaofei Hu; David Feiglin; Edward Lipson

doi:10.1117/12.813750

13 March 2009 Attenuation compensation in mesh-domain OSEM SPECT reconstruction

Levon Vogelsang, Yao Lu, Bo Yu, Andrzej Krol, Yuesheng Xu, Xiaofei Hu, David Feiglin, Edward Lipson

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72583G (2009) https://doi.org/10.1117/12.813750
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

A new method for attenuation compensation (AC) in mesh-domain SPECT OSEM reconstruction using strip-area approximation (SAAC) is introduced and compared to single-ray AC (SRAC). SAAC uses the polygonal area of the intersection of a mesh element (ME) and a tube-of-response (TOR) for defining an effective length of photon transit and an effective attenuation coefficient. This approach to AC is compared to SRAC, which defines the effective length of photon transit as the intersection of a single ray and a ME and the effective attenuation coefficient as the mean along the ray path. Comparative quantitative and qualitative analysis demonstrated that SAAC outperformed SRAC in terms of reconstruction image accuracy and quality.

Citation Download Citation

Levon Vogelsang, Yao Lu, Bo Yu, Andrzej Krol, Yuesheng Xu, Xiaofei Hu, David Feiglin, and Edward Lipson "Attenuation compensation in mesh-domain OSEM SPECT reconstruction", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72583G (13 March 2009); https://doi.org/10.1117/12.813750

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