Abstract:
An X-ray module includes a housing in which an opening portion is formed; an electron gun that emits an electron beam; a target that transmits an X-ray generated when the electron beam is incident on the target and emits the X-ray from an X-ray-emitting surface; an X-ray-emitting window that seals the opening portion, and that transmits the X-ray and emits the X-ray to a first side in an axial direction; and a heat radiating unit disposed outside the housing. The housing includes a surface on which a protrusion protruding to the first side is formed, the opening portion is formed in the protrusion, and the target is disposed in the opening portion. The heat radiating unit includes a first portion extending along the surface and thermally connected to the surface, and a second portion extending from the first portion to a second side opposite the first side.
Abstract:
Direct write electron-beam-to-x-ray converters are described, which may be programmed to focus x-rays into an arbitrary shape to provide spatial and intensity modulation to irradiate a malady such as a tumor. An integrated structure of the electron beam to x-ray converter comprises a collimating grid containing a target fluid. The collimating grid comprises a plurality of individual cells enclosed in a housing assembly. An electron beam aimed at a selected individual cell of the collimating grid may be converted to an x-ray beam within the target fluid.
Abstract:
In a radiation imaging apparatus, an envelope has a first window for transmitting radiation and is filled with an insulating liquid, and a radiation tube in the envelope has, at a position facing the first window, a second window for transmitting the radiation, and a shielding member. A solid insulating member is arranged between the shielding member and the inner wall of the envelope, and an opening is formed at a position on the insulating member corresponding to the first window. The shortest distance from the shielding member to the first window or the inner wall of the envelope through the opening of the insulating member without the insulating member is made to be longer than the shortest distance from the shielding member to the first window or the inner wall of the envelope through the insulating member, thereby improving withstand voltage performance without reducing an radiation amount.
Abstract:
An apparatus includes an electron collector includes a body having an internal bore formed therethrough along a first direction and a window side having an aperture formed in a first portion thereof along a second direction different from the first direction. The apparatus also includes a cover plate having a bottom surface coupled to a second portion of the first surface of the electron collector, and an x-ray transmission window coupled to the cover plate and aligned with the aperture along the second direction, wherein a recess is formed along the second direction in one of the first portion of the first surface of the electron collector and a portion of the bottom surface of the cover plate, and wherein a gap is formed between the bottom surface of the cover plate and the first surface of the electron collector.
Abstract:
A liquid-cooled aperture body in an x-ray tube. In one example embodiment, an x-ray tube is configured to be at least partially submerged in a liquid coolant. The x-ray tube includes a cathode at least partially positioned within a cathode housing, an anode at least partially positioned within a can, and an aperture body coupling the cathode housing to the can. The can is formed from a first material and the aperture body is formed from a second material. The aperture body defines an aperture through which electrons may pass between the cathode and the anode. The aperture body further defines at least two exterior surfaces that are each configured to be exposed to the liquid coolant in which the x-ray tube is at least partially submerged.
Abstract:
An x-ray tube includes a cathode positioned within a vacuum chamber and configured to emit electrons. The x-ray tube includes an anode positioned within the vacuum chamber to receive electrons emitted from the cathode and configured to generate a beam of x-rays from the electrons, a window positioned to pass the beam of x-rays therethrough, and an electron collector structure attached to the x-ray tube having an aperture formed therethrough to allow passage of x-rays therethrough. The aperture is shaped to prevent diffracted x-rays from combining with the beam of x-rays passing through the window.
Abstract:
Liquid cooled window assembly for an x-ray tube. In one example embodiment, an x-ray tube window assembly includes an x-ray tube window frame that defines an opening and an x-ray tube window configured to be attached to the x-ray tube window frame. When the x-ray tube window is attached to the x-ray tube window frame, the x-ray tube window substantially covers the opening defined by the x-ray tube window frame, and the x-ray tube window cooperates with the x-ray tube window frame to define a fluid passageway disposed about at least a portion of the opening. The fluid passageway includes an inlet and an outlet.
Abstract:
X-ray tube cooling systems. In one example embodiment, an x-ray tube includes a housing, a window frame attached to the housing, and a window attached to the window frame. The housing defines an aperture through which electrons can pass from a cathode to an anode. The housing also defines an inlet port and an outlet port. The window frame defines an opening through which x-rays can pass. The window covers the opening defined by the window frame. The housing and the window frame are configured such that a liquid can flow from the inlet port to the outlet port through either a first liquid path at least partially defined by the housing or a second liquid path cooperatively defined by the housing and the window frame. The second liquid path is disposed about at least a portion of the opening in the window frame.
Abstract:
A cooling apparatus (10) for X-ray tube inserts (14) is provided. The apparatus comprises a flow director (20) that is configured to direct at least a portion of a flow of a coolant toward a window (30) of an X-ray tube insert. The flow director may incorporate a flow sleeve (208) of a plurality of nozzles (88).
Abstract:
An x-ray tube window cooling assembly (11) for an x-ray tube (18) includes an electron collector body (110). The electron collector body (110) is thermally coupled to an x-ray tube window (102). The electron collector body (110) includes a coolant circuit (112) with a coolant inlet (114) and a coolant outlet (122). Multiple thermal exchange devices are coupled to the coolant circuit (112) and reduce temperature of a coolant passing through the exchange devices.