Eccentric source collimator assembly for rotating source CT scanner
US4304999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1979 |
| Grant date | Dec 8, 1981 |
| Priority date | — |
| Expiry date | Jan 2, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is a collimator for a tomographic scanner which performs the collimator function of dividing a fan of radiation into a multiplicity of finger beams and the attenuator function of causing a generally bell-shaped radiation energy distribution across a scan circle. The collimator has larger effective apertures for forming radiation into finger beams to traverse the center of the scan circle than for forming finger beams to traverse the edges of the scan circle. The width of the collimator apertures are defined by radially oriented vanes arranged along a circular arc. By offsetting the radiation source from the geometric center of the circular arc, the vanes defining the width of some apertures are more skewed than others relative to the radiation paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.