VARIABLE APERTURE AND ACTUATOR ASSEMBLIES FOR AN IMAGING SYSTEM

摘要

An imaging system which includes a housing for a radiation detector having a window disposed above and in axial alignment with the radiation detector, a variable aperture assembly which includes a base ring having a first opening and mounted on the radiation detector housing such that the first opening is in axial alignment with the window, a plate having a first aperture and adapted to engage the base ring such that the first aperture is disposed over the window, at least one aperture blade each operatively coupled to the base ring, and an aperture drive mechanism having a body and an actuator coupling member extending at an angle from the body. In addition, the imaging system includes an actuator assembly having an actuator and an actuator arm, the actuator arm disposed adjacent to the radiation detector housing in proximity to the actuator coupling member.

主权项

1. An aperture actuator assembly for use in actuating a variable aperture assembly disposed over a window of radiation detector housing in an imaging device, the variable aperture assembly including an aperture drive mechanism having a body and an actuator coupling member extending at an angle away from a plane of the body and adapted to be moved in a first lateral direction so that the variable aperture assembly defines a first aperture over the window and in a second lateral direction so that the variable aperture assembly defines a second aperture over the window, the aperture actuator assembly comprising:
an actuator adapted to be disposed adjacent to the radiation detector housing below the actuator coupling member; and an actuator arm coupled to the actuator and the actuator coupling member so that the actuator controls the lateral movement of the actuator coupling member.