Apparatus for spatial modulation of an x-ray beam
US7209547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2004 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Oct 28, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for spatial modulation of an x-ray beam has a number of planar attenuation elements for x-ray radiation that are disposed in a grid on a carrier and can be pivoted or tilted by a piezoelectric actuator, independently of one another, between at least two positions. One or more sensors with which a piezoelectrically-caused length and/or width and/or position change of the piezoelectrically influenced regions can be detected, are arranged on piezoelectrically influenced regions of the attenuation elements or the actuators. A significant dose reduction and/or dynamic adjustment thereof can be achieved with the apparatus by image adaptation in many areas of x-ray imaging, since a precise determination of the position of each attenuation element in real time is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.