Abstract:
An X-ray diagnosis apparatus comprising: an X-ray generator 1 for irradiating X-rays to an object; a planer type X-ray detector 14 for detecting the X-rays irradiated from the X-ray generator and passed through the object; a heat transfer medium 5 for absorbing the heat generated in the X-ray generator and the heat generated in the planer type X-ray detector; cooling means 13 for cooling the heat transfer medium heated by absorbing the heat; and means for moving the heat transfer medium between the X-ray generator, the planer type X-ray detector, and the cooling means.
Abstract:
A method and device for cooling and electrically-insulating a high-voltage, heat-generating component, for example, an x-ray tube (1105) for analyzing fluids by means of x-ray fluorescence. The device includes an x-ray source (1100) including an x-ray tube (1105) having improved heat-dissipating properties due to the thermal coupling of the x-ray tube with a thermally-conductive, dielectric material (1150). The device may include a base assembly (1135) mounted to the component for conducting heat away from the component while electrically isolating the component. In one aspect of the invention, the base assembly includes two copper plates (1140, 1145) separated by a dielectric plate (1150). The dielectric plate minimizes or prevents the leakage of current through the base assembly (1135). One aspect of the disclosed invention is most amenable to the analysis of sulfur in petroleum-based fuels.
Abstract:
An x-ray tube has a stationary cathode and a rotating anode in a vacuum housing. The anode is positioned on a housing-fixed axle such that it can be rotated, and is fashioned as a hollow body in the interior of which an axle-fixed ring projection is disposed, such that, at least between an inner surface of the rotating anode and the adjacent outer surface of the ring projection, a gap exists that is filled with liquid metal and forms a liquid-metal fluid bearing for the rotating anode.
Abstract:
An X-ray system (10) includes an X-ray tube (16) that has a temperature sensor (22) coupled thereto. The temperature sensor (22) may be included in a heat exchanger (18). The temperature sensor (22) generates a temperature signal that is provided to a controller (12). The controller (12) generates a fan speed control signal that is used to control the speed of the fan (20) in response to the temperature signal.
Abstract:
The useful life of x-ray tubes is extended by filtering metal particles and other decomposition products out of the coolant fluid by filter means permanently included in the closed loop cooling fluid circuit which also includes pump means and heat exchange means.
Abstract:
A system and method for improving cooling of a heat-generating component in a closed-loop cooling system is shown. The system comprises a venturi having a throat which is coupled to an expansion tank that is exposed to atmospheric pressure in the embodiment being described. The venturi, when used with a pressure switch, can operate to determine a flow rate which can be used to generate a signal which in turn is used to activate or deactivate one or more of the components, such as the heat-generating component, in the system. Advantageously, the design of the embodiment described has a convenient system which utilizes a pressure switch, thereby eliminating the need for a differential pressure switch of the type used in the past.
Abstract:
An x-ray tube assembly (16) includes a vacuum envelope (52) and an x-ray permeable exit window (54). An anode (50) is positioned within the vacuum envelope (52) such that a near side is adjacent to the exit window (54) and a far side is opposite thereof. A cathode assembly (74) is also mounted within the vacuum envelope (52) which directs an electron beam (78) toward a focal spot or point (58) on the far side of the anode (50). The anode further includes a central cavity or indentation (70) which provides a location for mounting a set of radiation attenuating vanes (64) in addition to a shaped x-ray filter or compensator (68). Close placement of the vanes (64) and the filter (68) relative to the focal spot of the anode desirably reduce off focal radiation and allow beam shaping. An externally located collimator (18) further shapes the output x-ray beam.
Abstract:
An X-ray tube anode comprises a graphite ring, a target substrate applied onto the graphite ring and a target focal track applied onto the target substrate. The target focal track comprises a first refractory metal and the target substrate comprises a second refractory metal and at least one layer of a material that is characterized by characterized by a coefficient of thermal expansion (CTE) that is the same as the CTE of the target focal track or is intermediate between the CTE of the target focal track and the CTE of the substrate.
Abstract:
An x-ray system comprising an x-ray generating device having improved heat dissipation capabilities is disclosed. The x-ray generating device comprises an x-ray tube mounted in a casing holding a circulating, cooling medium. According to the present invention, the x-ray generating device comprises a support mechanism mounted within said x-ray generating device in a manner for adjustably positioning, relative to the casing, the focal spot alignment path of generated x-rays. Additionally, the x-ray generating device comprises a cooling mechanism comprising an inlet chamber for channeling the cooling medium within said support mechanism. Additionally, a cooling stem may be positioned with the inlet chamber to increase the heat exchange surface area exposed to the cooling medium. Thus, the present invention advantageously increases the heat dissipation capability of the x-ray generating device.
Abstract:
A cooling system to cool the x-ray tube of a CT imaging system. The heat exchanger has a curved sector shape which provides a larger surface area for heat dissipation within the cover of the gantry. The axis of the cooling fans is preferably parallel to the rotational axis of the gantry.