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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.:
ASSOC UNIVERSITIES INC
OSTI Identifier:
871883
Patent Number(s):
5818050
Application Number:
08/838,493
Assignee:
Brookhaven Science Associates LLC (Upton, NY) BNL
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}
}

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