An orthotopic model of human pancreatic cancer in severe combined immunodeficient mice: potential application for preclinical studies |
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Authors: | RM Mohammad A Al-Katib GR Pettit VK Vaitkevicius U Joshi V Adsay AP Majumdar FH Sarkar |
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Affiliation: | Department of Radiology, University of Utah, Salt Lake City 84108, USA. roman@doug.med.utah.edu |
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Abstract: | The Compton camera can collect SPECT data with high efficiency due to electronic collimation. The data acquired from a Compton camera are projections of source activity along cones and are approximated in this paper by cone-surface integrals. This paper proposes the use of an orthogonal spherical expansion to convert the cone-surface integrals into plane integrals. The conversion technique is efficient. Once the plane integrals are obtained, a 3D image can be reconstructed by the 3D Radon inversion formula. The algorithm is implemented and computer simulations are used to demonstrate the efficiency and accuracy of the proposed reconstruction algorithm. |
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