Application of spherical harmonics to image reconstruction for the Compton camera.
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.
Basko
R
R
Department of Radiology, University of Utah, Salt Lake City 84108, USA. roman@doug.med.utah.edu
Zeng
G L
GL
Gullberg
G T
GT
D000465:Algorithms; D002138:Calibration; D003198:Computer Simulation; D004867:Equipment Design; D005583:Fourier Analysis; D015902:Gamma Cameras; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D011886:Radon; D012680:Sensitivity and Specificity; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation* / Q000379:methods
D011886:Radon