Study of scattering in positron emission tomography /
annihilation. Each annihilation yields two coincident gamma
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | annihilation. Each annihilation yields two coincident gamma calculations. coincident gamma-ray pair hence a line through the gamma-ray cross section and the attenuation factor evaluated for two developed from the Klein-Nishina differential scatterin encoded by the PET's electronics produce an address for each experimental subset of the TAMU PET was used to investigate gamma-ray scattering within the human head and to measure has a Compton scattering density similar to that of the head was modeled by a solid plexiglas cylinder; plexiglas human head. PSFs of the 1-m gamma-ray source were obtained in place is 1 smaller than that of the PSF obtained located at th center of the plexiglas was identical to mean-free-path length [ ] The PSF for locations nearly straight line through the gamma-ray source. The TAMU optics, and photomultiplier tubes (PMTs). PMT signals peak amplitude of the PSF obtained with the plexiglas he PET is constructed using plastic scintillators, fiber PET) is an experimental, medical-imaging instrument designed rays that propagate away from each other, thus tracing a source (68Ge, a positron-emitting substance) . The human source. Line addresses collected at various angles are used that of the PSF obtained without th plexiglas head. The the measured gamma-ray source distribution with a fixed the point-spread function (PSF) of the gamma-ray point The standard deviation of the PSF for the gamma-ray source The Texas A&M University positron emission tomograph (TAMU throughout the head is invariant within 10%. Deco volving to detect gamma rays produced by positron-electron to reconstruct an image of the radiating source. An to the following Gaussian function: [ ] variation in the PSF was confirmed by the retical where a is the background value added to the Gaussian term with a peak coe displacement along the abscissa is p. with and without the plexiglas head, and th PSFs were fitted without the head. The findings agree with theory |
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| Item Description: | "Major subject: Physics". Vita. |
| Physical Description: | xi, 105 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 95-97. |