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Proceedings Paper

Point Source Scatter Contributions From Finite Size Objects In Radioisotope Imaging
Author(s): J. A. Bieszk; C. B. Lim
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Paper Abstract

A Monte Carlo simulation was developed to study scatter contributions from a 140 keV point source at various depths and for different energy windows in finite water phantoms. Photoelectric and Compton interactions were considered. Scatter fractions, energy spectra, and radial spread functions of three approximately patientsized phantoms (rectangular prism, elliptical cylinder, and a sphere) were examined as a function of point-source depth and detector energy-window width. For a 100% energy window, energy spectra are characterized by a high energy region, a backscatter peak region, and a low energy, multi-scatter region. Depth dependent spatial limitations to the radial spread functions occur with decreasing window width. Scatter fractions for the sphere are much smaller than those of the other two phantoms, but approach their values as the size of the energy window decreases.

Paper Details

Date Published: 1 November 1982
PDF: 12 pages
Proc. SPIE 0372, Physics and Engineering in Medical Imaging, (1 November 1982); doi: 10.1117/12.934490
Show Author Affiliations
J. A. Bieszk, Siemens Gammasonics, Inc. (United States)
C. B. Lim, Siemens Gammasonics, Inc. (United States)


Published in SPIE Proceedings Vol. 0372:
Physics and Engineering in Medical Imaging
Orhan Nalcioglu, Editor(s)

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