Patent Number:
7,714,291
Title:
Method of and software for calculating a scatter estimate for tomographic scanning and system for tomographic scanning
Abstract:
The method calculates a scatter estimate for annihilation photons in a subject having a distribution of attenuation. The method can be used for scatter correction of detection data from a positron emission tomographic scanner. The method uses the following steps: --select a first scatter point S.sub.1 and a second scatter point S.sub.2, --determine a first scatter probability for scattering of a photon at scatter point S.sub.1 and a second scatter probability for scattering of a photon at scatter point S.sub.2, --determine an integral of the attenuation over a line connecting S.sub.1 and S.sub.2, --multiply the integral and the scatter probabilities and use the product in the calculation of the scatter estimate.
Inventors:
Thielemans; Kris Filip Johan Jules (London, GB), Tsoumpas; Charalampos (London, GB)
Assignee:
Hammersmith Imanet Limited
International Classification:
G01T 1/161 (20060101)
Expiration Date:
5/11/12018