Cone-beam backprojection reconstruction from sources distributed on a spherical surface

Rostyslav Boutchko

doi:10.1117/12.560114

26 October 2004 Cone-beam backprojection reconstruction from sources distributed on a spherical surface

Rostyslav Boutchko

Proceedings Volume 5535, Developments in X-Ray Tomography IV; (2004) https://doi.org/10.1117/12.560114
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

One of the recent efforts in development of cone-beam CT is aimed at the construction of a volumetric CT apparatus with distributed X-ray sources. This new concept in 3D CT requires a CT reconstruction algorithm designed for X-ray foci uniformly distributed on a surface rather than on a curve. To research the properties of such algorithm an exact reconstruction formula is derived for a continuous distribution of sources on a surface of a sphere. The algorithm is implemented using finite number of focal spots for simulated phantom projection data. High resolution images were obtained for 100-400 focal spots for both noiseless and noisy input. The results exhibit a potential for CT image reconstruction from highly undersampled projection data.

Citation Download Citation

Rostyslav Boutchko "Cone-beam backprojection reconstruction from sources distributed on a spherical surface", Proc. SPIE 5535, Developments in X-Ray Tomography IV, (26 October 2004); https://doi.org/10.1117/12.560114

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