Patent ID: 6323492
Filing Date: 2001-11-27
Classification: A61B,G01T

Abstract:
A camera for creating an image of the radiation density of a source of photons located in a subject, the camera comprising:a first detector (D1) for detecting the time, location (X1) and energy (E1) of collisions between said first detector (D1) and photons emanating from the subject;a second detector (D2) for detecting the time, location (X2) and energy (E2) of collisions between said second detector (D2) and photons emanating from the first detector (D1);Compton event detector means connected to the first and second detectors (D1 and D2) and being responsive to the information produced thereby to identify sets of collisions in the respective first and second detectors that are produced by Compton events; andimage reconstruction means responsive to energies E1 and E2 produced by a detected Compton event and an estimation E.sub.0 of a photon incident energy for constructing an image;angle determining means responsive to the energies E1 and E2 produced by a detected Compton event and an estimation of the energy E.sub.0 of said photons emanating from the subject for calculating the angle of Compton scattering of said detected Compton event.