Normalization apparatus for panel detector PET scanners
US6963065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2003 |
| Grant date | Nov 8, 2005 |
| Priority date | — |
| Expiry date | Apr 24, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A normalization apparatus and method for a PET scanner with panel detectors for obtaining an estimate of a normalization array, for correction for count rate effects on the normalization array, and for measurement of the relation between the normalization array and the count rate. The method of the present invention is based on two quasi-independent radial and axial components, which are count rate dependent due to sensitivity changes across the detector blocks. A scatter source is disposed at the center of the FOV and a scatter-free source is disposed at the outer edge of the FOV. The method computes the normalization array through several steps which evaluate the geometric profile, the axial profile, and the correction factor. A count rate correction is introduced to extend the normalization array to any count rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.