The present embodiments relate to a radiation generator.
Ray-based imaging devices, which like X-ray equipment used for fluoroscopy or computed tomography scanners used for cross-sectional imaging, are used in the medical diagnostics field. Powerful and efficient devices have been developed in the course of ongoing technological advances. In order to generate radiation, such as X-ray beams, electrons are accelerated from a cathode to an anode and brought to an abrupt stop at the anode. As a result, X-ray radiation is generated. During the braking process, however, only a part of the electrons' energy is converted into X-ray radiation, with the majority being transformed into heat. Temperatures of several 100° C. are reached in the radiation generating tubes. Accordingly, the radiation generating tube is surrounded by cooling liquid. The higher the power output of a radiation generating tube, the greater also must be the cooling capacity of the radiation generator.
DE 10 2005 049 445 B4 describes a heat exchanger for a single-tank generator of an X-ray diagnostic device that stirs up the cooling liquid using a circulating pump and thereby effects a more efficient dissipation of the thermal energy away from the radiation generating tube.
DE 88 12 277 U1, DE 86 15 918 U1, and US 2001/001 41 39 A1 disclose radiation generators in which the cooling liquid disposed in the protective tube housing is circulated through the protective tube housing. An external cooling device is used for cooling the cooling liquid down again. DE 88 12 277 U1 and DE 86 15 918 U1 disclose a cooling device attached to the housing.
The present embodiment may obviate one or more the drawbacks or limitations inherent in the related art. For example, in one embodiment, a radiation generator permits efficient and simple cooling.
In one embodiment, a radiation generator may include a protective tube housing and a radiation generating tube. The radiation generating tube may be arranged in the protective tube housing. The protective tube housing may be filled with a cooling liquid.
At least one flow channel may be integrally molded on the protective tube housing for a cooling medium ducted (channeled) via an inlet and outlet pipe and serving to cool the interior of the protective tube housing.
The radiation generator may deliver efficient cooling performance without additional devices. Because the channel is integrally molded on the protective tube housing, the protective tube housing may be manufactured more compactly and the heat produced as a result of the radiation generation may be dissipated quickly and close to the site at which it is produced. Accordingly, the flow volume and the flow rate of the cooling medium may be easily controlled. The surface area occupied by the flow channel or serving for heat exchange may be optimized. Greater scope is provided for designing the cooling surface, and at the same time the heat can be dissipated more easily and efficiently.
The flow channel for the cooling medium may be integrated into the protective tube housing. In other words, the flow channel is integrated into the protective tube housing walls. The protective tube housing serves as a cooling medium channel by being molded into an appropriate shape. For example, corrugations arching toward the interior can be provided, integrally molded in the protective tube housing wall.
The flow channel of the present invention does not serve to duct the cooling liquid that is disposed in the protective tube housing, but rather a cooling medium is ducted therein via which the protective tube housing interior is to be cooled. This is particularly effectively possible by means of the flow channels integrated into the protective tube housing.
The protective tube housing may include two housing parts, with at least one flow channel being embodied on at least one housing part. The protective tube housing may be broken into components. Accordingly, further constituent parts of the radiation generator, such as, the radiation generating tube, may be easily assembled. The protective tube housing may be divided into two housing parts, although the protective tube housing may be subdivided into more than two housing parts. The flow channel or channels may be restricted to one housing part, but they can also be routed across a plurality of housing parts.
The protective tube housing or at least the housing part of the protective tube housing having the flow channel may be a metal casting. The protective tube housing or the housing part of the protective tube housing may be easily manufactured by dead-mold casting. Using metal is necessary on account of the amount of heat that is to be expected to build up in the protective tube housing.
The radiation generator may have at least one flow channel open toward the exterior and a cover covering the same. Accordingly, the flow channel is easily accessible from outside and the manufacture of the protective tube housing having the flow channel is simplified.
The at least one flow channel may be embodied at least in sections as an annular channel which runs at least in sections around a ray exit window provided on the protective tube housing. The ray exit window may be a site where a great amount of heat builds up, so it is beneficial to cool the ray exit window. Cooling the ray exit window happens as a result of the physical proximity of the cooling medium to the ray exit window. Owing to the annular shape of the flow channel, almost the entire circumference of the ray exit window is encompassed. As a result, the heat is dissipated.
In one embodiment, at least one cooling fin may project into the flow channel. The at least one cooling fin may be integrally molded on the protective tube housing. Accordingly, the surface area of the cooled surface may be increased.
Various embodiments described herein can be used alone or in combination with one another. The forgoing detailed description has described only a few of the many possible implementations of the present invention. For this reason, this detailed description is intended by way of illustration, and not by way of limitation. It is only the following claims, including all equivalents that are intended to define the scope of this invention.
Number | Date | Country | Kind |
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10 2005 049 455 B | Apr 2008 | DE | national |
This patent document claims the benefit of DE 10 2008 017 153.0 filed Apr. 3, 2008, which is hereby incorporated by reference.