Collimator-free photon tomography

Details Collimator-free photon tomography Collimator-free photon tomography

1997-04-07

1998-10-06

Westin, Edward P.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036304, G01T 1166

Patent

active

058180508

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.

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