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Collimator-free photon tomography

United States Patent

*** EXPIRED ***
October 6, 1998
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
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.
Dilmanian; F. Avraham (Yaphank, NY), Barbour; Randall L. (Westbury, NY)
Brookhaven Science Associates LLC (Upton, NY)
08/ 838,493
April 7, 1997
This invention was made with Government support under contract number DE-AC02-76CH00016, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.