Process and apparatus for scanning sections of radiation
US3970852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1974 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Jul 8, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/1642
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The process of this invention includes detecting gamma radiation with a radiation sensing device, converting the gamma radiation to light radiation, viewing the light radiation with photomultiplier tubes and giving electrical impulses in response thereto. The impulses are operated on to correct for any distortion and to give an indication of the relation to location of the radiation. An area of interest, for the purpose of scanning, is selected and electronically masked. During a first pass, initial scanning is done electronically without physical movement of the radiation sensing device head. After initial electronic scanning, a detector head passes over the radiation of interest while sensing radiation. At the end of the mechanical movement, an area of radiation is again electronically scanned. A cot supporting the section of radiation is moved transverse to the longitudinal movement of the head after the first pass. A scan in the opposite direction occurs similar to that in the first direction. The radiation is correlated between the first scan and the second scan. In order to reduce artifacts, the perimeters of the areas under consideration are oscillated with a saw-tooth wave.…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.