25 September 2001 Calibration of x-ray projections in 3D reconstruction
Author Affiliations +
Proceedings Volume 4553, Visualization and Optimization Techniques; (2001) https://doi.org/10.1117/12.441567
Event: Multispectral Image Processing and Pattern Recognition, 2001, Wuhan, China
In cone-beam 3D CT, 2D X-ray projections determine the reconstruction quality directly. However, the generation of an X-ray projection is a complex process that includes the emission, the conversion and the transfer of X-ray latent information, so the pixel value of a projection has no exact meaning generally. In this paper, we suggest a way by experiments to model the whole imaging system based on 'equivalent single energy' which is used to analyze polychromatic X-ray. We define each tissue's SCF(single calibration factor) of human and get GCF (gross calibration factor) by summing up every weighted SCF, then we can use GCF to calibrate and linearize X-ray projections. After such processing, X-ray projection will have explicit meaning, i.e. its pixel value can denote the equivalent material thickness linearly, which will be advantageous to the algorithm research of 3D reconstruction and other quantitative analyses of human's physiological parameters.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ping Wang, Ping Wang, Xuanqin Mou, Xuanqin Mou, Zhongyuan Qin, Zhongyuan Qin, Yuanlong Cai, Yuanlong Cai, } "Calibration of x-ray projections in 3D reconstruction", Proc. SPIE 4553, Visualization and Optimization Techniques, (25 September 2001); doi: 10.1117/12.441567; https://doi.org/10.1117/12.441567

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