VARIABLE APERTURE AND ACTUATOR ASSEMBLIES FOR AN IMAGING SYSTEM

摘要

Variable aperture and actuator assemblies are provided for a radiation de tector housing in an imaging system. The variable aperture assembly includes a ring mounted over the housing's window, a plate having a first aperture d isposed over the window, an aperture blade operatively coupled to the ring s o the blade moves laterally relative to the first aperture, and an aperture drive mechanism having a body and an actuator coupling member extending at a n angle from the body. The drive mechanism is adapted to drive the blade lat erally away from the first aperture when the member is moved in a first late ral direction, and over the first aperture to define a second aperture dispo sed over the window when the member is moved in a second lateral direction. The actuator assembly has an actuator and an actuator arm adapted to engage the actuator coupling member to control the lateral movement of the member.