Method and apparatus for controlling dose in computed X-ray imaging
US9188549B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2015 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | May 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2210/41
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention pertains to a system and method for X-ray imaging wherein a targeted fluence at the detector for projection images can be achieved at a plurality of projection angles around the imaging subject by control of exposure times implemented during image acquisition. Exposure time for a second projection image may be determined by the fluence in a first projection image, and in a third projection image by the fluence in a second projection image, where projection images are acquired within two degrees of one another. An acquisition parameter calculation can be configured to calculate acquisition parameters, such as said exposure times, to achieve the targeted fluence in projection images and can be coupled to a rotation controller that implements the acquisition parameters by controlling a relative angle between the imaging subject and X-ray image acquisition device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.