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US 5,086,444 AGranted
Primary radiation diaphragm
AssigneeSiemens Aktiengesellschaft
InventorGuenter Bartmann
Life of this patent
Estimating the term…
Abstract
A primary radiation diaphragm for use in a medical radiation application apparatus for gating the x-ray beam emitted by a radiation source onto a desired region has first and second diaphragm plates and an actuator for the diaphragm plates having two ranges of adjustment. The first diaphragm plate is adjusted within the first range of adjustment by movement of the actuator, and the second diaphragm rate is adjusted by moving the actuator within the second range of adjustment.
Claims8
A primary radiation diaphragm for a medical radiation application apparatus, said primary radiation diaphragm comprising:
- first and second diaphragm plates;
- and
- actuator means in mechanical connection with said first and second diaphragm plates and having first and second different ranges of adjustment for respectively differently adjusting said first and second diaphragm plates in succession with said first diaphragm plate being adjusted by initially moving said actuator means within said first range of adjustment and said second diaphragm plate being adjusted by subsequently moving said actuator means within said second range of adjustment, wherein said actuator means is a control disc rotatable around a central axis through said first and second ranges of adjustment in succession so that as said control disc is rotated around said central axis said first diaphragm plate is adjusted in said first range of adjustment and as said control disc is further rotated around said central axis the position of said first diaphragm plate remains constant and said second diaphragm plate is adjusted in said second range of adjustment.
Dependencies are inferred from the claim text.