Drum-type volume source calibration phantom and calibration method thereof
US7479628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2007 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Oct 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/169
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A drum-type volume source calibration phantom is provided, which comprises a drum-type container; a plurality of plate groups stacking up inside the drum-type container, at least one slab of radioactive source, each of which is disposed between the adjacent plate groups and comprises a plurality of radionuclides. The present invention further provides a calibration method that starts by the step of providing a radioactivity test for each drum-type volume calibration phantom. Then, a calibration relationship of density vs. counting efficiency corresponding to the several different drum-type volume source calibration phantoms is performed in a waste curie monitor. Finally, a characteristic of photonic energy dependency is measured for a modification factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.