CN211511841U - X-ray CT apparatus - Google Patents
X-ray CT apparatus Download PDFInfo
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- CN211511841U CN211511841U CN201921686404.5U CN201921686404U CN211511841U CN 211511841 U CN211511841 U CN 211511841U CN 201921686404 U CN201921686404 U CN 201921686404U CN 211511841 U CN211511841 U CN 211511841U
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Abstract
The utility model discloses an embodiment's X ray CT device related has: a gantry rotating unit which arranges the X-ray tube and the X-ray detector opposite to each other; a gantry cover which covers the gantry in which the gantry rotating portion is disposed, and in which an exhaust opening portion for exhausting air inside the gantry is formed near an uppermost portion of the gantry; a cooling fan which is arranged on the inner side of the stand right below the exhaust opening and conveys air in the stand to the exhaust opening; an exhaust opening cover which can seal the exhaust opening; and an exhaust opening cover opening/closing mechanism for supporting the exhaust opening cover in an openable/closable manner with respect to the exhaust opening at a peripheral edge portion of the exhaust opening of the gantry cover. According to the present embodiment, it is possible to prevent foreign matter from entering the gantry through the exhaust opening when the X-ray CT apparatus is not in operation.
Description
Technical Field
The utility model relates to an X line CT device especially relates to one kind and can prevent that little foreign matter such as dust, water droplet from forming into the inside X line CT device of device from the exhaust opening portion who forms on pallet upper portion.
Background
Fig. 7 is a perspective view showing an external appearance of a stand of a conventional X-ray CT apparatus. An X-ray CT apparatus detects X-rays irradiated from an X-ray tube and passing through a subject, and reconstructs an image based on the detected result to obtain an X-ray tomographic image. The gantry 1 is covered with a gantry cover. The stand cover has a stand upper cover 2 and a stand bottom cover 3. When the X-ray CT apparatus is operating, heat is generated by the X-ray tube. In order to efficiently discharge the heat to the outside of the gantry, an exhaust opening 4 is formed near the uppermost portion of the gantry 1 of the gantry upper cover 2. The exhaust opening 4 is provided with a mesh member 5 for preventing large foreign matters from entering. A cooling fan for improving the efficiency of discharging air from the inside of the gantry 1 is disposed near the exhaust opening 4 in the inside of the gantry 1.
However, since the exhaust opening 4 is formed near the uppermost portion of the gantry 1 and the mesh member 5 provided in the exhaust opening 4 has a mesh structure, there is a possibility that the X-ray CT apparatus may not be operated (when the cooling fan is stopped and the exhaust air is not exhausted from the exhaust opening 4): small foreign matters (dust, water droplets from an air conditioner installed on the ceiling of the examination room, etc.) passing through the mesh of the mesh member enter the inside of the gantry 1 through the exhaust opening 4, and affect the inside of the X-ray CT apparatus.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide an X-ray CT apparatus which can prevent foreign matter from entering the inside of a gantry through an exhaust opening formed in the upper part of a gantry cover when the X-ray CT apparatus does not operate.
In order to achieve the above object, an X-ray CT apparatus according to an embodiment of the present invention includes:
an X-ray tube for generating X-rays;
an X-ray detector that detects X-rays generated from the X-ray tube;
a gantry rotating unit that arranges the X-ray tube and the X-ray detector facing each other;
a gantry cover that covers a gantry in which the gantry rotating unit is disposed, and that has an exhaust opening portion formed near an uppermost portion of the gantry to exhaust air inside the gantry;
a cooling fan disposed on the inside of the rack directly below the exhaust opening, the cooling fan configured to send air inside the rack to the exhaust opening;
an exhaust opening cover that can seal the exhaust opening; and
and an exhaust opening cover opening/closing mechanism for supporting the exhaust opening cover in an openable and closable manner with respect to the exhaust opening at a peripheral edge portion of the exhaust opening of the cover.
According to the present embodiment, it is possible to prevent foreign matter from entering the gantry through the exhaust opening when the X-ray CT apparatus is not in operation.
Drawings
Fig. 1 is a diagram showing a configuration of an X-ray CT apparatus according to the present embodiment;
fig. 2 is a schematic plan view of a gantry of the X-ray CT apparatus of fig. 1 as viewed from the front;
fig. 3 is a view showing an external appearance of a gantry of the X-ray CT apparatus of fig. 1;
fig. 4 is a partially enlarged perspective view showing a state in which the exhaust opening portion of fig. 3 is closed by the exhaust opening portion cover;
FIG. 5 is a partially enlarged perspective view showing a state where an exhaust opening cover of the exhaust opening of FIG. 3 is opened;
FIG. 6 is a view showing a relationship between the exhaust opening part and the cooling fan in FIG. 3;
fig. 7 is a diagram showing an external appearance of a gantry of a conventional X-ray CT apparatus.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same functional configurations and steps having the same processing contents, and redundant description is omitted.
Fig. 1 is a diagram showing a configuration of an X-ray CT apparatus 1 according to the present embodiment. As shown in fig. 1, the X-ray CT apparatus includes a gantry 110 and a console 140.
The gantry 110 includes a gantry rotating portion 111 in a gantry cover having an opening 111 a. The gantry rotating unit 111 includes an X-ray tube 113 and an X-ray detector 115 arranged to face each other. An FOV (Field Of View) is provided inside the opening Of the gantry rotation unit 111. The position of the top plate 117 is set so that the imaging region of the subject P is included in the FOV. The gantry rotating unit 111 is electrically connected to the rotation driving unit 119. The rotation driving unit 119 rotates the gantry rotating unit 111 at a constant angular velocity according to the control of the gantry control unit 121.
The X-ray tube 113 generates X-rays upon receiving the application of a high voltage from the high voltage generator 125. The high voltage generator 125 applies a high voltage to the X-ray tube 113 according to the control of the gantry controller 121.
A cooling fan 129 is provided inside the gantry 110. The cooling fan 129 is an exhaust fan for sending air inside the gantry 110 to the outside in accordance with control from the gantry controller 121.
The X-ray detector 115 detects X-rays generated from the X-ray tube 113. The X-ray detector 115 mounts a plurality of X-ray detection elements arranged in a two-dimensional pattern. For example, the plurality of X-ray detection elements are arranged along an arc centered on the rotation axis of the gantry rotation unit 111. The direction in which the X-ray detecting elements are arranged along the circular arc is referred to as a channel direction. The plurality of X-ray detecting elements arranged in the channel direction are referred to as X-ray detecting element columns. The plurality of X-ray detecting element columns are arranged in a column direction, which is a direction along the rotation axis. Each X-ray detector detects X-rays generated from the X-ray tube 113, and generates an electric signal (current signal) corresponding to the intensity of the detected X-rays. The generated electric signals are supplied to a data acquisition unit (DAS) 131.
The data collection unit 131 collects an electric signal for each View angle (View) by the X-ray detector 115 under the control of the gantry controller 121. The viewing angle corresponds to the rotation angle of the gantry rotating part 111 around the rotation axis. As the signal processing, the angle of view corresponds to a sampling point of data when the gantry rotation unit 111 rotates. The data collection unit 131 converts the collected analog electrical signals into digital data. The digital data is supplied to the console 140 for each predetermined angle of view by the noncontact type transmission unit 133.
The gantry controller 121 collectively controls various devices mounted on the gantry 110 in accordance with an instruction from the system controller 151 in the console 140. The gantry controller 121 controls the rotation driver 119, the high voltage generator 125, the cooling fan 129, the data collector 131, and the exhaust opening cover 127.
The console 140 includes a preprocessing unit 141, a reconstruction unit 143, a display unit 145, an operation unit 147, a storage unit 149, and a system control unit 151. The preprocessing unit 141 performs preprocessing such as logarithmic conversion and sensitivity correction on the digital data transmitted from the transmission unit 133. The preprocessed digital data is referred to as projection data. The image data generated by the reconstruction unit 143 is displayed on a display device. The operation unit 147 receives various instructions and information input from the user via the input device. The storage unit 149 stores digital data, projection data, and image data. The storage unit 149 stores a control program. The system control unit 151 reads out the control program stored in the storage unit 149, expands the control program on the memory, and controls each unit according to the expanded control program.
Next, the structure of the mount 110 of the present embodiment will be described.
Fig. 2 is a schematic plan view of a gantry of the X-ray CT apparatus of fig. 1 as viewed from the front. Fig. 3 is a diagram showing a structure of a gantry of the X-ray CT apparatus of fig. 1.
As shown in fig. 2, the gantry rotating portion 111 in the gantry 110 includes a substantially cylindrical rotating frame 211 having an opening 111a formed in the center. A hole or a concave portion is formed in the rotating frame 211 to mount various devices such as the X-ray tube 113 and the X-ray detector 115. The rotating frame 211 is a metal frame made of metal such as aluminum. Various devices such as the X-ray tube 113 and the X-ray detector 115 are operated by receiving power supply from a gantry controller 121 (not shown) fixedly installed in the gantry. The X-ray tube 113 and the X-ray detector 115 are attached to the rotating frame 112 so as to face each other with the opening 111a interposed therebetween.
The gantry 110 is covered with a gantry cover having an upper gantry cover 201 for covering an upper portion of the gantry 110 and a bottom gantry cover 202 for covering a portion of the gantry 110 near the installation floor. A plurality of exhaust openings 203 for exhausting air inside the gantry are formed near the uppermost portion of the gantry 110 of the upper cover of the gantry. The plurality of cooling fans 129 are disposed near the plurality of exhaust openings 203 in order to improve the efficiency of discharging air from the inside of the gantry 110. As in the present embodiment, when the plurality of exhaust openings 203 are formed near the uppermost portion of the gantry cover (gantry upper cover 201), the plurality of cooling fans 129 are disposed directly below the plurality of exhaust openings 203.
As shown in fig. 3, the plurality of exhaust opening portions 203 formed near the uppermost portion of the gantry cover (gantry upper cover 201) are configured to be closable by a plate-shaped exhaust opening portion cover 127 supported on the peripheral edge portion of the exhaust opening portion 203 of the gantry upper cover 201.
In the present embodiment, the shape of the exhaust opening portion 203 is circular, and the shape of the exhaust opening portion cover 127 is also circular along the shape of the exhaust opening portion 203, and the diameter of the exhaust opening portion cover 127 is smaller than the diameter of the opening portion of the exhaust opening portion 203. The exhaust opening portion 203 is sealed by the exhaust opening portion cover 127 in a state where the exhaust opening portion 203 is sealed by the exhaust opening portion cover 127.
In the present embodiment, in order to allow the exhaust opening cover 127 to efficiently receive the wind pressure of the exhaust air by the cooling fan 129, the exhaust opening cover 127 is circular in size along the trajectory of the blades rotating in the cooling fan 129 (that is, the diameter (size) of the exhaust opening cover 127 is substantially the same as the diameter (size) of the trajectory circle when the cooling fan 129 rotates), but the shape of the exhaust opening 203 may be a rectangular shape instead of a circular shape. In this case, the shape of the exhaust opening portion cover 127 is a shape conforming to the shape of the exhaust opening portion 203, and the exhaust opening portion 203 may be sealed by the exhaust opening portion cover 127 in a state where the exhaust opening portion 203 is sealed by the exhaust opening portion cover 127.
Next, the structure in the vicinity of the exhaust opening 203 will be described with reference to fig. 4, 5, and 6.
Fig. 4 is a partially enlarged perspective view showing a state in which the exhaust opening of fig. 3 is sealed by the exhaust opening cover. Fig. 5 is a partially enlarged perspective view showing a state where the exhaust opening cover of the exhaust opening of fig. 3 is opened. Fig. 6 is a diagram showing a relationship between the exhaust opening portion and the cooling fan in fig. 3.
As shown in fig. 4 and 5, the exhaust opening 203 is configured such that a plate-shaped exhaust opening cover 127 supported by an exhaust opening cover opening/closing mechanism 501 can be sealed to the peripheral edge of the exhaust opening 203 of the gantry upper cover 201. That is, the exhaust opening cover opening/closing mechanism 501 supports the exhaust opening cover 127 so as to be openable and closable with respect to the exhaust opening 203 at the peripheral edge portion of the exhaust opening 203 of the gantry upper cover 201.
The exhaust opening cover opening/closing mechanism 501 is configured such that one end of a rod-shaped support having a constant length is rotatably supported by the peripheral edge of the exhaust opening 203 of the gantry upper cover 201, and the other end is slidably supported by one surface of the plate-shaped exhaust opening cover 127.
Further, the following may be configured: the exhaust opening cover opening/closing mechanism 501 is formed of 2 tubular structures having different diameters and circular or rectangular cross sections, and one end of a rod-shaped support (i.e., a support which is extendable and retractable) having a small diameter is rotatably supported by the periphery of the exhaust opening 203 of the gantry upper cover 201 inside the large diameter structure, and the other end is rotatably supported by one surface of the plate-shaped exhaust opening cover 127.
The exhaust opening cover opening/closing mechanism 501 may be a hinge that rotatably supports the exhaust opening cover 127 on the peripheral edge of the exhaust opening 203.
In the present embodiment, the opening operation of the exhaust opening cover 127 with respect to the exhaust opening 203 is based on the pressure of the exhaust air of the cooling fan 129, and the closing operation of the exhaust opening 127 with respect to the exhaust opening 203 is based on its own weight, but the opening and closing of the exhaust opening cover 127 may be manually performed by an operator of the X-ray CT apparatus.
As shown in fig. 6, the cooling fan 129 is disposed near the exhaust opening 203 in order to improve the efficiency of discharging air from the inside of the gantry 110. Preferably, the exhaust opening 203 is formed near the uppermost portion of the gantry of the cover (gantry upper cover 201), and the cooling fan 129 is disposed directly below the exhaust opening 203.
When the cooling fan 129 is not operated (when the X-ray CT apparatus is not operated), the exhaust opening 203 is closed by the exhaust opening cover 127. When the cooling fan 129 is operating (when the X-ray CT apparatus is operating), the exhaust opening portion cover 127 receives the wind pressure of the exhaust air from the cooling fan 129, the exhaust opening portion cover 127 is opened, and the exhaust opening portion 127 is opened.
The opening degree of the exhaust opening cover 127 is changed by the wind pressure from the cooling fan 129, and when the rotation of the blades of the cooling fan 129 is fast, the wind pressure of the exhaust air from the cooling fan 129 is strong, and therefore the opening degree of the exhaust opening cover 127 is large, and when the rotation of the blades of the cooling fan 129 is slow, the wind pressure from the cooling fan 129 is weak, and therefore the opening degree of the exhaust opening cover 127 is small.
As shown in fig. 1, the rotational speed of the blades of the cooling fan 129 can be controlled by the gantry controller 121, for example, as follows: in the start-up or standby state of the X-ray CT apparatus before imaging, the cooling fan 129 generates a small amount of heat in the gantry 110, and therefore the cooling fan 129 rotates slowly, and the cooling fan 129 generates a large amount of heat in the gantry 110 during imaging, and therefore the cooling fan 129 rotates quickly.
When the internal temperature of the gantry 110 is detected and reaches a predetermined temperature or higher, the gantry controller 121 controls the rotation speed of the blades of the cooling fan 129 to be higher, and the wind pressure of the exhaust gas from the exhaust opening portion 203 is increased, thereby increasing the opening of the exhaust opening portion cover 127 and increasing the amount of the exhaust gas from the exhaust opening portion 203.
The exhaust opening cover 127 receives the wind pressure of the exhaust air from the cooling fan 129 by the exhaust opening cover opening and closing mechanism 501 during the operation of the cooling fan 129 (during the operation of the X-ray CT apparatus), and therefore, the exhaust opening 203 can be kept open.
When the cooling fan 129 is stopped (operation of the X-ray CT apparatus is stopped), the exhaust opening cover opening/closing mechanism 501 receives the weight of the exhaust opening cover 127, and the exhaust opening cover 127 seals the exhaust opening 203. That is, the exhaust opening 203 is sealed by the weight of the exhaust opening cover 127.
With the above configuration, the exhaust opening cover 127 is opened to open the exhaust opening 203 in a state where the X-ray CT apparatus is operating, so that heat inside the gantry 110 can be exhausted from the exhaust opening 203, and the exhaust opening cover 127 is closed to close the exhaust opening 203 in a state where the X-ray CT apparatus is not operating, so that entry of small foreign substances into the gantry 110 from the exhaust opening 203 can be prevented.
The maximum opening degree of the exhaust opening cover 127 with respect to the exhaust opening 203 depends on the length of the strut of the exhaust opening cover opening and closing mechanism 501. In the case where foreign matter is prevented as much as possible from entering the gantry 110 from the exhaust opening 203 while the cooling fan 129 is operating (while the X-ray CT apparatus is operating), the length of the support is adjusted in advance so that the maximum opening of the exhaust opening cover 127 with respect to the exhaust opening 203 does not increase (for example, such that the maximum opening is 45 degrees). With such a configuration, when the X-ray CT apparatus is operating, the exhaust opening cover 127 is opened to open the exhaust opening 203, so that heat inside the gantry 110 can be exhausted from the exhaust opening 203, and foreign matter can be prevented from entering from the outside while exhausting air even in a state where the upper side of the exhaust opening 203 is not completely opened but is covered to some extent. Further, a mesh member may be provided between the exhaust opening portion 203 and the cooling fan 129 so that large foreign matters do not enter the exhaust opening portion 203 from the outside in a state where the exhaust opening portion cover 127 is opened.
As another embodiment, the following structure may be adopted: as shown in fig. 1, the exhaust opening/closing mechanism 501 is electrically connected to the gantry controller 121, and the opening and closing of the exhaust opening cover 127 is controlled in accordance with a command from the gantry controller 121.
In this case, when the X-ray CT apparatus starts to operate, the gantry controller 121 detects that the X-ray CT apparatus starts to operate, and transmits a control signal to the exhaust opening/closing mechanism 501 to open the exhaust opening cover 127 and open the exhaust opening 203 so that the exhaust opening cover 127 is operated to open the exhaust opening 203.
The opening of the exhaust opening cover 127 may be controlled according to the temperature inside the gantry 110. For example, when the temperature inside the gantry 110 is detected and reaches a predetermined temperature or higher, the gantry controller 121 increases the rotation speed of the blades of the cooling fan 129 and increases the opening of the exhaust opening cover 127, thereby increasing the amount of exhaust gas from the exhaust opening 203.
When the operation of the X-ray CT apparatus is stopped, the gantry controller 121 detects the stop of the operation of the X-ray CT apparatus, and transmits a control signal to the exhaust opening/closing mechanism 501 to close the exhaust opening cover 127 so as to close the exhaust opening 203 so as to operate the exhaust opening cover 127, thereby closing the exhaust opening 203.
In this case, the following may be used: when a temperature lower than a predetermined value is detected from the temperature inside the gantry 110, the gantry controller 121 sends a control signal to the exhaust opening/closing mechanism 501 to close the exhaust opening cover 127 to seal the exhaust opening 203.
In the above configuration, the opening and closing of the exhaust opening cover 127 are controlled according to the temperature inside the gantry 110, but the opening and closing of the exhaust opening cover 127 may be controlled according to the operation of the cooling fan 129.
In this case, when the operation of the cooling fan 129 is started, the gantry control unit 121 detects the start of the operation of the cooling fan 129, and transmits a control signal to the exhaust opening portion opening/closing mechanism 501 to operate the exhaust opening portion opening/closing mechanism 501, thereby opening the exhaust opening portion cover 127 to open the exhaust opening portion 203. When the cooling fan 129 is stopped, the gantry controller 121 detects the stop of the cooling fan 129, and sends a control signal to the exhaust opening/closing mechanism 501 to operate the exhaust opening/closing mechanism 501 to close the exhaust opening cover 127, thereby sealing the exhaust opening 203.
When it is detected that the temperature inside the gantry 110 is equal to or lower than a certain value, the gantry controller 121 transmits a control signal for stopping the operation to the cooling fan 129, and thereby the cooling fan 129 is stopped.
Further, the following may be configured: as shown in fig. 1, a command signal is transmitted from the system control unit 151 to the gantry control unit 121 in accordance with an operation of the operation unit 147 of the console 140 of the X-ray CT apparatus, and the operation/stop of the cooling fan 129, the control of the rotation speed of the blades of the cooling fan 129, or the control of the opening/closing of the exhaust opening cover 127 by the exhaust opening/closing mechanism 501 are performed in accordance with the command signal.
In the present embodiment, the opening and closing operation of the exhaust opening cover 127 with respect to the exhaust opening 203 may be performed electrically by the console 140.
While several embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various manners, and various omissions, substitutions, combinations, and changes can be made without departing from the gist of the present invention. These embodiments and modifications are included in the scope and gist of the present invention, and are included in the present invention described in the claims and the equivalent scope thereof.
Claims (8)
1. An X-ray CT apparatus comprising:
an X-ray tube for generating X-rays;
an X-ray detector that detects X-rays generated from the X-ray tube;
a gantry rotating unit that arranges the X-ray tube and the X-ray detector facing each other;
a gantry cover that covers a gantry in which the gantry rotating unit is disposed, and that has an exhaust opening portion formed near an uppermost portion of the gantry to exhaust air inside the gantry;
a cooling fan disposed on the inside of the rack directly below the exhaust opening, the cooling fan configured to send air inside the rack to the exhaust opening;
an exhaust opening cover that can seal the exhaust opening; and
and an exhaust opening cover opening/closing mechanism for supporting the exhaust opening cover in an openable and closable manner with respect to the exhaust opening at a peripheral edge portion of the exhaust opening of the gantry cover.
2. The X-ray CT apparatus according to claim 1,
the stand cover has a stand upper cover for covering an upper portion of the stand and a stand bottom cover for covering a portion of the stand near a floor.
3. The X-ray CT apparatus according to claim 1,
the exhaust opening cover opening/closing mechanism is configured such that one end of a rod-shaped support column having a constant length is rotatably supported by the peripheral edge portion of the exhaust opening of the cover, and the other end is slidably and rotatably supported by one surface of the exhaust opening cover.
4. The X-ray CT apparatus according to claim 1,
the exhaust opening cover opening and closing mechanism is configured to: the exhaust hood is composed of 2 tubular structures with different diameters and circular or rectangular cross sections, one end of a rod-shaped support column which is arranged inside the structure with the small diameter and can slide is rotatably supported on the peripheral edge of the exhaust opening of the hood, and the other end of the rod-shaped support column is rotatably supported on one surface of the exhaust opening cover.
5. The X-ray CT apparatus according to claim 1,
the exhaust opening cover opening/closing mechanism is a hinge that rotatably supports the exhaust opening cover on the peripheral edge of the exhaust opening.
6. The X-ray CT apparatus according to claim 1,
the exhaust opening portion is circular, the exhaust opening portion cover is circular along the shape of the exhaust opening portion, and the diameter of the exhaust opening portion cover is smaller than that of the exhaust opening portion.
7. The X-ray CT apparatus according to claim 1,
the cooling fan includes a mesh member disposed between the exhaust opening and the cooling fan.
8. The X-ray CT apparatus according to claim 6,
the size of the exhaust opening part cover is the same as the size along the trajectory of the blades rotating in the cooling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921686404.5U CN211511841U (en) | 2019-10-10 | 2019-10-10 | X-ray CT apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921686404.5U CN211511841U (en) | 2019-10-10 | 2019-10-10 | X-ray CT apparatus |
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| CN211511841U true CN211511841U (en) | 2020-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113331857A (en) * | 2021-05-27 | 2021-09-03 | 东软医疗系统股份有限公司 | Medical imaging equipment and heat dissipation control method thereof |
-
2019
- 2019-10-10 CN CN201921686404.5U patent/CN211511841U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113331857A (en) * | 2021-05-27 | 2021-09-03 | 东软医疗系统股份有限公司 | Medical imaging equipment and heat dissipation control method thereof |
| CN113331857B (en) * | 2021-05-27 | 2023-08-29 | 东软医疗系统股份有限公司 | Medical imaging equipment and heat dissipation control method thereof |
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