Patent · US Expired

Primary radiation diaphragm for x-ray diagnostics equipments

US4897861A · kind A · utility

7Cited by

8References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Willi Schaefer · Erlangen, DE
Guenter Bartmann · Erlangen, DE
Michael Meyer · Eschborn, DE

Key dates

Filing date	Jun 20, 1988
Grant date	Jan 30, 1990
Priority date	—
Expiry date	Jun 20, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG21K1/04
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The diaphragm plates are individually adjustable in two-dimensional fashion. Semi-transparent diaphragm sections at the edges of the diaphragm plates limiting the radiation are adjustable perpendicular to the respective edge with a lever linkage such that the semi-transparent region becomes larger when the diaphragm is closed. A feedback control unit is present for operation. This feedback control unit has two operating pieces as an operating mechanism, which are displaceable by a user to positions similar to the diaphragm plates, and are electrically coupled to the feedback control unit to cause movement of the diaphragm plates to a position corresponding to the position of the operating plates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.