Positron emission tomography (PET) imaging using scattered and unscattered photons
US8384036B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2985
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Determining the position of a radioactive source in a PET system. Detecting a scatter coincidence event characterized by a full-energy photon detected at a first detector and partial-energy photon at a second detector. Measuring the arrival time difference between the partial energy photon and the full energy photon. Measuring the energy of the partial-energy photon. Determining a scattering point as a function of the position of the first detector, the position of the second detector, the energy of the partial-energy photon, the energy of an unscattered photon, the mass of a scattering electron, and the speed of light. Determining the position of a radioactive PET source along a line between the scatter point and the first detector as a function of the distance between scatter point and the first detector, the distance between scatter point and the second detector, and the measured time difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.