Method for reducing an electronic time coincidence window in positron emission tomography
US7402807B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2005 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Dec 11, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for acquiring PET images with reduced time coincidence window limits includes obtaining a preliminary image of a patient within a radiation field of view (FOV), determining the spatial location of the patient within the FOV based on the preliminary image, calculating a different time coincidence window based on the spatial location of the patient for each possible pair of oppositely disposed detectors, scanning the patient with a PET scanning system to detect a pair of gamma photons produced by an annihilation event, determining whether the detection of the pair of gamma photons occurs within the time coincidence window, accepting the detected event only if the detection of the gamma photons occurs within the time coincidence window, calculating the spatial location of accepted annihilation event, and adding the calculated spatial location of the annihilation event to a stored distribution of calculated annihilation event spatial locations representing the distribution of radioactivity in the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.