Variable aperture and actuator assemblies for an imaging system
First Claim
1. An imaging system, comprising:
- a housing for a radiation detector, the housing having a window disposed above and in axial alignment with the radiation detector;
a variable aperture assembly including;
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 so that the at least one aperture blade is adapted to move laterally relative to the first aperture, andan aperture drive mechanism having a body and an actuator coupling member extending at an angle from the body, the body being operatively coupled to the base ring and to each aperture blade such that the aperture drive mechanism drives each aperture blade laterally away from the first aperture in response to the actuator coupling member being moved in a first lateral direction, and laterally over the first aperture to define a second aperture disposed over the window in response to the actuator coupling member being moved in a second lateral direction; and
an actuator assembly disposed adjacent to the radiation detector housing in proximity to the actuator coupling member, the actuator assembly having an actuator and an actuator arm, the actuator arm having a first end operatively coupled to the actuator and a second end adapted to engage the actuator coupling member of the aperture drive mechanism so that the actuator controls the lateral movement of the actuator coupling member.
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0 Petitions
Accused Products
Abstract
Variable aperture and actuator assemblies are provided for a radiation detector housing in an imaging system. The variable aperture assembly includes a ring mounted over the housing'"'"'s window, a plate having a first aperture disposed over the window, an aperture blade operatively coupled to the ring so the blade moves laterally relative to the first aperture, and an aperture drive mechanism having a body and an actuator coupling member extending at an angle from the body. The drive mechanism is adapted to drive the blade laterally away from the first aperture when the member is moved in a first lateral direction, and over the first aperture to define a second aperture disposed 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.
38 Citations
65 Claims
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1. An imaging system, comprising:
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a housing for a radiation detector, the housing having a window disposed above and in axial alignment with the radiation detector; a variable aperture assembly including; 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 so that the at least one aperture blade is adapted to move laterally relative to the first aperture, and an aperture drive mechanism having a body and an actuator coupling member extending at an angle from the body, the body being operatively coupled to the base ring and to each aperture blade such that the aperture drive mechanism drives each aperture blade laterally away from the first aperture in response to the actuator coupling member being moved in a first lateral direction, and laterally over the first aperture to define a second aperture disposed over the window in response to the actuator coupling member being moved in a second lateral direction; and an actuator assembly disposed adjacent to the radiation detector housing in proximity to the actuator coupling member, the actuator assembly having an actuator and an actuator arm, the actuator arm having a first end operatively coupled to the actuator and a second end adapted to engage the actuator coupling member of the aperture drive mechanism so that the actuator controls the lateral movement of the actuator coupling member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A variable aperture assembly for use in an imaging system having a housing for a radiation detector, the housing having a window disposed above and in axial alignment with the radiation detector, the variable aperture assembly comprising:
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a base ring having a first opening and adapted to be 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 so that the at least one aperture blade is adapted to move laterally relative to the first aperture; and an aperture drive mechanism having a body and an actuator coupling member extending at an angle from the body, the body being operatively coupled to the base ring and to each aperture blade such that the aperture drive mechanism drives each aperture blade laterally away from the first aperture in response to the actuator coupling member being moved in a first lateral direction, and laterally over the first aperture to define a second aperture disposed over the window in response to the actuator coupling member being moved in a second lateral direction. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. 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 down at an angle from 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:
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an actuator adapted to be disposed adjacent to the radiation detector housing below the actuator coupling member, and an actuator arm disposed between the actuator and the actuator coupling member, the actuator arm having a first end operatively coupled to the actuator and a second end adapted to engage the actuator coupling member of the aperture drive mechanism so that the actuator controls the lateral movement of the actuator coupling member. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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Specification