DocumentCode :
2184800
Title :
Ray-driven analytical fan-beam SPECT reconstruction with nonuniform attenuation
Author :
Wen, Junhai ; Li, Tianfang ; Liang, Zhengong
Author_Institution :
Dept. of Radiol., State Univ. of New York, Stony Brook, NY, USA
fYear :
2002
fDate :
2002
Firstpage :
629
Lastpage :
632
Abstract :
Single-photon emission computed tomography (SPECT) is based on the measurement of radiation emitted by a radiotracer injected into the patient. Because of photoelectric absorption and Compton scatter, the photons are attenuated inside the body before arriving at the detector. A quantitative reconstruction must consider the attenuation, which is usually non-uniform. Novikov and Natterer had derived an explicit formula for nonuniformly attenuated SPECT reconstruction of parallel-hole collimators. In this paper, we extend their researches to fan-beam collimators. Because any ray in fan-beam geometry can be treated as a ray in parallel-beam geometry, we derived a ray-driven analytical fan-beam reconstruction formula with non-uniform attenuation. Its accuracy is demonstrated computer simulation experiments.
Keywords :
Compton effect; digital simulation; image reconstruction; medical image processing; photoelectricity; single photon emission computed tomography; Compton scatter; injected radiotracer; medical diagnostic imaging; nonuniform attenuation; nuclear medicine; parallel-hole collimators; photoelectric absorption; quantitative reconstruction; ray-driven analytical fan-beam SPECT reconstruction; Attenuation; Collimators; Computed tomography; Computer simulation; Detectors; Electromagnetic scattering; Electromagnetic wave absorption; Geometry; Particle scattering; Single photon emission computed tomography;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Imaging, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7584-X
Type :
conf
DOI :
10.1109/ISBI.2002.1029336
Filename :
1029336
Link To Document :
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