skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Collimator-free photon tomography

Abstract

A method of uncollimated single photon emission computed tomography includes administering a radioisotope to a patient for producing gamma ray photons from a source inside the patient. Emissivity of the photons is measured externally of the patient with an uncollimated gamma camera at a plurality of measurement positions surrounding the patient for obtaining corresponding energy spectrums thereat. Photon emissivity at the plurality of measurement positions is predicted using an initial prediction of an image of the source. The predicted and measured photon emissivities are compared to obtain differences therebetween. Prediction and comparison is iterated by updating the image prediction until the differences are below a threshold for obtaining a final prediction of the source image.

Inventors:
 [1];  [2]
  1. Yaphank, NY
  2. Westbury, NY
Issue Date:
Research Org.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
871883
Patent Number(s):
5818050
Application Number:
08/838,493
Assignee:
Brookhaven Science Associates LLC (Upton, NY)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
collimator-free; photon; tomography; method; uncollimated; single; emission; computed; administering; radioisotope; patient; producing; gamma; ray; photons; source; inside; emissivity; measured; externally; camera; plurality; measurement; positions; surrounding; obtaining; corresponding; energy; spectrums; thereat; predicted; initial; prediction; image; emissivities; compared; obtain; differences; therebetween; comparison; iterated; updating; below; threshold; final; computed tomography; energy spectrum; gamma ray; photon emission; single photon; emission computed; source inside; gamma camera; ray photons; /250/

Citation Formats

Dilmanian, F Avraham, and Barbour, Randall L. Collimator-free photon tomography. United States: N. p., 1998. Web.
Dilmanian, F Avraham, & Barbour, Randall L. Collimator-free photon tomography. United States.
Dilmanian, F Avraham, and Barbour, Randall L. Tue . "Collimator-free photon tomography". United States. https://www.osti.gov/servlets/purl/871883.
@article{osti_871883,
title = {Collimator-free photon tomography},
author = {Dilmanian, F Avraham and Barbour, Randall L},
abstractNote = {A method of uncollimated single photon emission computed tomography includes administering a radioisotope to a patient for producing gamma ray photons from a source inside the patient. Emissivity of the photons is measured externally of the patient with an uncollimated gamma camera at a plurality of measurement positions surrounding the patient for obtaining corresponding energy spectrums thereat. Photon emissivity at the plurality of measurement positions is predicted using an initial prediction of an image of the source. The predicted and measured photon emissivities are compared to obtain differences therebetween. Prediction and comparison is iterated by updating the image prediction until the differences are below a threshold for obtaining a final prediction of the source image.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {10}
}

Patent:

Save / Share:

Works referenced in this record:

Simultaneous reconstruction of absorption and scattering distributions in turbid media using a Born iterative method
conference, October 1995

  • Yao, Yuqi; Wang, Yao; Pei, Yaling
  • SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, SPIE Proceedings
  • https://doi.org/10.1117/12.224152

Reconstruction of two-dimensional permittivity distribution using the distorted Born iterative method
journal, June 1990


Simultaneous scattering and absorption images of heterogeneous media using diffusive waves within the Rytov approximation
conference, May 1995