Radiographic installation for an x-ray examination apparatus
First Claim
1. A radiographic installation for an x-ray examination apparatus having a radiation field comprising:
- two antiscatter grids;
means supporting said antiscatter grids in two substantially parallel planes and permitting lateral movement of said grids in said respective planes from a standby position outside of said radiation field to a position within said radiation field;
bias means connected to each of said grids for permanently applying a force thereto urging said grids into said standby position; and
drive means having a single cable engageable with each of said grids for displacing said grids counter to said force from said standby position to said position within said radiation field.
1 Assignment
0 Petitions
Accused Products
Abstract
A radiographic installation for an x-ray examination apparatus has two antiscatter grids disposed in different planes at different distances from the focus of the radiation source and are alternately movable by a motor connected thereto through a drive train from a standby position outside of the radiation field into a position within the radiation field. The grids are maintained in the standby position by a permanently-acting bias force and are moved into the radiation field by the motor in opposition to this force. The drive train includes a belt having two cams disposed at the opposite ends thereof respectively associated with the antiscatter grids for limiting the movement thereof to define selected positions for the grids.
35 Citations
7 Claims
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1. A radiographic installation for an x-ray examination apparatus having a radiation field comprising:
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two antiscatter grids; means supporting said antiscatter grids in two substantially parallel planes and permitting lateral movement of said grids in said respective planes from a standby position outside of said radiation field to a position within said radiation field; bias means connected to each of said grids for permanently applying a force thereto urging said grids into said standby position; and drive means having a single cable engageable with each of said grids for displacing said grids counter to said force from said standby position to said position within said radiation field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification