Gamma camera with dynamic threshold
US7262416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | May 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/1642
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of locating an event with a gamma camera (12) of an emission computed tomography (ECT) scanner (10) is provided. The gamma camera (12) includes a matrix of sensors (22) situated to view the event. The sensors (22) have respective outputs that are responsive to the event. The method includes: identifying a first sensor in the matrix that has in response to the event a highest output relative to the other sensors in the matrix (step (B2)); identifying a number of second sensors in the matrix that are closest neighbors to the first sensor (step (B3)); combining into a total output a number of outputs from the identified sensors, the number of outputs being at least one (1) and less than the number of all the identified sensors (step (B4)); and, determining a threshold value which is a percentage of the total output (step (B4)).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.