A noise-reducing and temperature-controlled static CT device and system

Abstract

This invention discloses a static CT device and system with noise reduction and temperature control. The static CT device includes an outer casing, a detector ring, a radiation source ring, an inverter ring, a fan, and a blower. The outer casing is formed by a front cover plate, a rear cover plate, and two side cover plates. The detector ring, radiation source ring, inverter ring, fan, and blower are all installed within the hollow cavity of the outer casing. The area between the front cover plate and the radiation source ring forms an air intake zone; the area where the detector ring is located forms a first heat dissipation zone; the area where the inverter ring is located forms a second heat dissipation zone; the area between the rear cover plate and the detector ring and inverter ring forms an exhaust zone; a first air duct runs from the air intake zone to the blower; a second air duct runs from the air intake zone through the first and second heat dissipation zones to the blower; and a third air duct runs from the air intake zone through the first and second heat dissipation zones and converges at the exhaust zone before reaching the blower. Thus, external cold air enters the interior of each component through multiple air ducts, achieving zoned cooling control.

Description

Technical Field

[0001] This invention relates to a noise-reducing and temperature-controlled static CT device, and also to a static CT system including the static CT device, belonging to the field of medical device technology. Background Technology

[0002] CT (Computed Tomography) is a large-scale imaging device widely used in the medical field. It mainly consists of key components such as an X-ray tube, detector, gantry, machine bed, and data acquisition and processing system. During CT operation, the X-ray tube exposure generates a large amount of heat, causing the internal temperature of the gantry to rise rapidly. Because the detector gain is highly sensitive to temperature changes, precise temperature control of the detector is essential during scanning to ensure sampling stability and image quality.

[0003] With the continuous advancement of CT technology, the power of X-ray tubes is constantly increasing. At the same time, the crystal materials of the new generation of photon counting detectors are more sensitive to temperature, which requires the detector to operate in a constant low-temperature environment.

[0004] Currently, CT equipment mainly uses the following temperature control methods:

[0005] The first method involves installing a large fan at the top of the rack. This fan draws hot air out of the cavity and draws in cool air from the bottom, creating airflow within the cavity and thus achieving cooling. However, this design only allows the gas to flow around the cavity edges, cooling the surface of the components, but it cannot penetrate deep into the components, resulting in less than ideal cooling performance inside the components.

[0006] The second method involves equipping the CT scanner with an external cooling unit, which delivers refrigerant into the gantry via piping for cooling. For example, patent CN1541619A discloses a cooling method for a cooling gantry. This method uses external cooling equipment to generate high-pressure cold air, which is then piped into the gantry. However, because this method requires an external cooling unit, it is not only costly but also inconvenient for the installation and deployment of CT scanners in hospitals. Summary of the Invention

[0007] The primary technical problem to be solved by this invention is to provide a static CT device with noise reduction and temperature control.

[0008] Another technical problem to be solved by the present invention is to provide a static CT system including the static CT device.

[0009] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0010] According to a first aspect of the present invention, a static CT device with noise reduction and temperature control is provided, comprising:

[0011] The outer cover is formed by the front cover plate, the rear cover plate and the side cover plates, and has a hollow inner cavity, and a central hole is formed in the center of the outer cover;

[0012] A detector ring is disposed within the hollow inner cavity, and the central axis of the detector ring coincides with the central axis of the central hole.

[0013] A radiation source ring is disposed outside the detector ring, and the central axis of the radiation source ring coincides with the central axis of the central hole, so that each radiation source can emit X-rays toward the detector ring;

[0014] An inverter ring is disposed outside the detector ring, and the central axis of the inverter ring coincides with the central axis of the central hole; and, in the axial direction of the central hole, the inverter ring is located on one side of the X-ray source ring.

[0015] The fan is installed inside the hollow cavity of the outer cover and located on the inner bottom surface of the outer cover;

[0016] A fan is installed in a fan mounting hole on the top of the outer casing;

[0017] The area between the front cover and the outer wall of the radiation source ring forms an air intake area; the area where the detector ring is located forms a first heat dissipation area; the area where the inverter ring is located forms a second heat dissipation area; the area between the rear cover and the detector ring and the inverter ring forms an exhaust area; both the air intake area and the exhaust area are connected to the fan mounting hole.

[0018] A first air duct is formed from the air intake area to the fan mounting hole of the outer casing; a second air duct is formed from the air intake area through the first heat dissipation area and the second heat dissipation area to the fan mounting hole of the outer casing; a third air duct is formed from the air intake area through the first heat dissipation area and the second heat dissipation area, and then converges to the exhaust area to the fan mounting hole of the outer casing.

[0019] Preferably, the detector ring includes multiple detector modules, and the multiple detector modules are arranged together in a ring shape around the axis of the central hole;

[0020] Each of the detector modules has a detector air inlet on the side facing the front cover, and each detector air inlet is equipped with a detector fan.

[0021] Preferably, the detector module includes:

[0022] The detector housing has a hollow detector cavity, the detector air inlet is connected to the detector cavity, and the detector cavity is also provided with a detector air outlet;

[0023] A detector chip is disposed within the detector cavity for detecting X-rays;

[0024] A cooling chip, wherein the cold side of the cooling chip is attached to the detector chip, and the hot side of the cooling chip is located inside the detector cavity;

[0025] The cold side of the cooling chip always maintains a preset temperature, and the hot side of the cooling chip dissipates heat as the outside cold air flows along the second or third air duct.

[0026] Preferably, the static CT device further includes:

[0027] A controller, connected to the fan, is used to control the fan's rotational speed;

[0028] A temperature control probe is disposed on the hot surface of the cooling chip and connected to the controller;

[0029] The fan is connected to the controller, which receives the current hot surface temperature from the temperature control probe and controls the fan speed so that the current hot surface temperature is not lower than the preset condensation temperature of the cooling chip.

[0030] Preferably, the inverter ring includes multiple inverters, which are arranged in a ring around the axis of the central hole, so that each inverter corresponds to each detector module.

[0031] Each inverter is equipped with an inverter fan to blow airflow from the second heat dissipation area to the exhaust area.

[0032] Preferably, noise-reducing ducts are provided at both the air inlet and air outlet of the fan.

[0033] Preferably, the inner surface of the front cover is provided with a plurality of air duct nozzles, which are arranged in a ring around the central axis of the central hole and correspond one-to-one with the air inlets of the plurality of detectors.

[0034] The inner surface of the front cover plate is also formed with a front cover air duct, which is connected to a plurality of air duct nozzles. The air outlet of the fan faces the front cover air duct so that cold air from the outside can enter the air duct nozzles through the front cover air duct.

[0035] Preferably, air inlet ducts are provided at the bottom of both the rear cover and the side cover.

[0036] Preferably, the top of the outer cover is provided with a plurality of fan mounting holes, and a fan is installed in each of the fan mounting holes;

[0037] One group of fans corresponds to the air intake area, and the other group of fans corresponds to the air exhaust area.

[0038] According to a second aspect of the present invention, a static CT system is provided, comprising:

[0039] The aforementioned static CT equipment;

[0040] A CT scanning bed is positioned on one side of the static CT device and can move horizontally toward or away from the static CT device to move the patient within the central aperture of the static CT device.

[0041] A control unit is connected to the static CT device to control the static CT device to perform CT scans on the patient.

[0042] Compared with the prior art, the present invention has the following technical effects:

[0043] (1) In this static CT device, by optimizing the layout design of the outer casing and various components, the internal space of the hollow cavity is divided into four areas: air inlet area A, first heat dissipation area B, second heat dissipation area C, and exhaust area D; and three air ducts are formed according to the positional relationship of the four areas. When cold air from the outside is sent into air inlet area A, it can flow into different areas from the three air ducts, thereby cooling down the components in each area. By managing the heat in zones, the cooling effect of each component is improved.

[0044] (2) By installing a cooling chip on the detector chip of the detector module, the detector chip is cooled by the constant temperature of the cooling chip, thereby avoiding temperature fluctuations of the detector chip and ensuring the working efficiency of the detector chip.

[0045] (3) By installing noise-reducing ducts at the air inlet and outlet of the fan, the noise generated during air flow is reduced and the impact on air flow is minimal.

[0046] (4) By setting a temperature control probe to detect the hot surface temperature of the cooler in real time, the speed of the fan is controlled by the controller to prevent the hot surface temperature of the cooler from falling below the condensation temperature of the cooler. As a result, condensation will not occur during the entire operation, thus avoiding affecting the normal operation of the detector chip. Attached Figure Description

[0047] Figure 1A front view diagram of a noise-reducing and temperature-controlled static CT device with the front cover panel omitted, provided in an embodiment of the present invention.

[0048] Figure 2 This is a schematic diagram of the front cover.

[0049] Figure 3 This is a partial cross-sectional schematic diagram of a static CT device with noise reduction and temperature control provided in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram showing the partitioning of the components inside the outer casing and the gas flow direction;

[0051] Figure 5 This is a schematic diagram of the detector module.

[0052] Figure 6 This is a schematic diagram of the mating structure between the detector module and the temperature control probe.

[0053] Figure 7 This is a schematic diagram of the rear structure of a noise-reducing and temperature-controlled static CT device provided in an embodiment of the present invention;

[0054] Figure 8 This is a schematic diagram of a static CT system provided in an embodiment of the present invention. Detailed Implementation

[0055] The technical content of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0056] The core technical concept of this invention is: to divide the area according to the layout of the outer cover and various components, thereby forming multiple airflow channels based on the position of each zone. When cold air from the outside enters the interior of the outer cover, it can enter multiple zones through multiple airflow channels to cool down different components, thereby greatly improving temperature control efficiency.

[0057] like Figures 1-3 As shown in the figure, an embodiment of the present invention provides a noise-reducing and temperature-controlled static CT device, including an outer casing 1, a detector ring 2, a radiation source ring 3, an inverter ring 4, a fan 5, and a fan 6. This static CT device is mainly used for CT scans of patients. During the CT scan, a large amount of heat is generated. If this heat accumulates inside the static CT device, it can cause various components to malfunction. Therefore, the fan 5 and fan 6 are used for zoned heat dissipation. However, the airflow generated during zoned heat dissipation produces significant noise when flowing within the static CT device. Therefore, the noise problem can be solved by implementing noise reduction measures for the fan 5.

[0058] Specifically, in this embodiment, such as Figure 1 and Figure 2As shown, the outer cover 1 is formed by a front cover plate 11, a rear cover plate 12, and two side cover plates 13. The outer cover 1 is hollow, forming a hollow cavity 101, providing installation space for components such as the detector ring 2, the X-ray source ring 3, the inverter ring 4, the fan 5, and the air fan 6. Furthermore, a central hole 102 is formed in the center of the outer cover 1 to allow for CT scanning when the patient is placed into the central hole 102 on the CT bed. Preferably, the outer cover 1 can be made of metal, which provides good mechanical strength and better protects other components. Alternatively, the outer cover 1 can be made of a combination of plastic, composite materials, and metal. Using metal in areas requiring high mechanical strength and composite or plastic materials in areas requiring relatively low mechanical strength reduces the weight of the outer cover 1, thereby reducing the weight of the static CT equipment in this embodiment.

[0059] like Figure 1 As shown, the detector ring 2, radiation source ring 3, inverter ring 4, fan 5, and fan 6 are all installed inside the hollow cavity 101 of the outer casing 1. The central axes of the detector ring 2, radiation source ring 3, and inverter ring 4 coincide with the central axis of the central hole 102. The detector ring 2 includes multiple detector modules 21 (such as...). Figure 3 As shown, multiple detector modules 21 are arranged in a ring around the axis of the central hole 102. Each detector module 21 has a detector air inlet 201 on the side facing the front cover 11, and each detector air inlet 201 is equipped with a detector fan 202.

[0060] The X-ray source ring 3 and the inverter ring 4 are both arranged around the outside of the detector ring 2, and are side by side along the axial direction of the central hole 102. Figure 3 As shown, the X-ray source ring 3, located near the front cover plate 11, is formed by multiple X-ray tubes 31 arranged in a ring around the axis of the central hole, so that each X-ray tube 31 can emit X-rays toward each detector module 21. The inverter ring 4, located near the rear cover plate 12, is formed by multiple inverters 41 arranged in a ring around the axis of the central hole, so that each inverter 41 corresponds to each detector module 21. Furthermore, each inverter 41 is equipped with an inverter fan 411.

[0061] The fan 5 is located on the inner bottom surface of the outer cover 1 and is used to introduce cold air from the outside into the hollow cavity 101 to cool down the components. The fan 6 is located in the fan mounting hole 103 at the top of the outer cover 1 and is used to exhaust the gas that has undergone heat exchange in the hollow cavity 101 to the outside.

[0062] It is understandable that there are certain gaps between the outer casing 1 and the various components, thus forming air ducts for gas to pass through. Specifically, such as... Figure 4As shown, the area between the front cover 11 and the outer wall of the X-ray source ring 3 forms the air intake area A; the area where the detector ring 2 is located forms the first heat dissipation area B; the area where the inverter ring 4 is located forms the second heat dissipation area C; and the area between the rear cover 12 and the detector ring 2 and the inverter ring 4 forms the exhaust area D. Thus, the internal space of the hollow cavity 101 is divided into four areas, and both the air intake area A and the exhaust area D are connected to the fan 6.

[0063] like Figure 4 As shown, the airflow from the intake area A reaches the fan mounting hole 103 on the outer casing, forming a first air duct 110. The airflow from the intake area A passes through the first heat dissipation area B and the second heat dissipation area C, reaching the fan mounting hole 103 on the outer casing, forming a second air duct 120. The airflow from the intake area A passes through the first heat dissipation area B and the second heat dissipation area C, converging at the exhaust area D before reaching the fan mounting hole 103 on the outer casing, forming a third air duct 130.

[0064] The working principle of zoned cooling through multiple air ducts is explained in detail below:

[0065] When fan 5 starts, it introduces cool outside air (typically 25°C air from the CT scan room) into air intake zone A. When fan 6 starts, a low-pressure zone forms in the area where fan 6 is located, causing gas to flow towards fan 6, i.e., the gas flows within the first air duct 110. During this process, since the X-ray source ring 3 (composed of multiple X-ray tubes arranged in a ring) is located within air intake zone A, the cool air flowing within the first air duct 110 exchanges heat with the X-ray source ring 3, thereby cooling each X-ray tube of the X-ray source ring 3.

[0066] Since the detector ring 2 is equipped with a detector fan 202, when the detector fan 202 is started, a low-pressure area will also be formed in the first heat dissipation area B where the detector ring 2 is located. This will cause some of the cold air in the air intake area A to be diverted into the first heat dissipation area B, thereby cooling the detector ring 2.

[0067] Furthermore, since inverter fan 411 is installed on inverter ring 4, a low-pressure area will also be formed in the second heat dissipation zone C where inverter ring 4 is located when inverter fan 41 is started. Part of the gas flowing out from the first heat dissipation zone B directly enters the exhaust zone D, while the other part flows into the second heat dissipation zone C, thereby cooling inverter ring 4. That is, some gas will flow within the second air duct 120. After the gas in the second air duct 120 completes heat exchange with inverter ring 4, part of it will flow directly to fan 6, while the other part will be blown from the second heat dissipation zone C to the exhaust zone D by inverter fan 41.

[0068] The gas discharged from detector ring 2 and inverter ring 4 converges in exhaust zone D, and then flows from exhaust zone D to fan 6. That is, the gas flows within the third air duct 130. All the gas flowing to fan 6 is eventually discharged to the outside, completing a full heat exchange process.

[0069] like Figure 5 As shown, in a preferred embodiment of the present invention, the detector module 21 includes a detector housing 211, a detector chip 212, and a cooling element 213. The detector housing 211 has a hollow detector cavity 2111, with a detector air inlet 201 communicating with the detector cavity 2111. The detector cavity 2111 also has a detector air outlet 203. Cold air from the air inlet area A enters the detector cavity 2111 through the detector air inlet 201 and exits from the detector cavity 2111 through the detector air outlet 203. The detector chip 212 is disposed within the detector cavity 2111 for detecting X-rays. The cold side of the cooling element 213 is attached to the detector chip 212, and the hot side of the cooling element 213 is located within the detector cavity 2111. In this embodiment, the cold surface of the cooling chip 213 is always maintained at a preset temperature to cool the detector chip 212, while the outside cold air dissipates heat from the hot surface of the cooling chip 213 as it flows along the second or third air duct. Therefore, because the cold surface of the cooling chip 213 has a constant temperature, the temperature of the detector chip 212 can be precisely controlled using the cooling chip 213, ensuring the working efficiency of the detector module 21.

[0070] Even better, such as Figure 6 As shown, the static CT device also includes a controller 7 and a temperature control probe 8. The controller 7 is used for system control, and the fan 5 is electrically connected to the controller 7. The temperature control probe 8 is located on the hot surface of the cooling element 213 and connected to the controller 7. During operation, the temperature control probe 8 detects the current hot surface temperature of the cooling element 213 and then feeds the temperature value back to the controller 7. Upon receiving the temperature value, the controller 7 controls the rotation speed of the fan 5 according to a preset program, ensuring that the current hot surface temperature of the cooling element 213 does not fall below the preset cooling element condensation temperature. This ensures that no condensation occurs during the entire CT scan, avoiding any impact on the CT scan results.

[0071] In this embodiment, the condensation temperature of the cooling chip can be calculated using the following formula:

[0072]

[0073] Where E represents the saturated water vapor pressure in kPa; and t represents the indoor temperature of the CT scanning room.

[0074] For example, when the indoor temperature of a CT scanning room is 25℃ and the humidity is 60%RH, the calculated saturated vapor pressure is 3.167429436 kPa. However, during normal use, the vapor pressure in a CT scanning room is approximately 50-60% of the saturated vapor pressure. Therefore, 3.167429436 kPa * 60% ≈ 1.9 kPa.

[0075] Then, based on E = 1.9 kPa, t = 16.7 °C was calculated, meaning that the thermoelectric cooler will begin to condense when its temperature is below 16.7 °C. Therefore, t = 16.7 °C was preset as the condensation temperature of the thermoelectric cooler.

[0076] like Figure 2 As shown, in the above embodiment, preferably, the inner surface of the front cover plate 11 is provided with a plurality of air duct nozzles 111, which are arranged in a ring around the central axis of the central hole 102 and correspond one-to-one with a plurality of detector air inlets 201. Furthermore, the inner surface of the front cover plate 11 also forms a front cover air duct 112, which is connected to the plurality of air duct nozzles 111. The air outlet of the fan 5 faces the front cover air duct 112, so that cold air from the outside can enter the air duct nozzles 111 through the front cover air duct 112, and then enter the detector cavity 2111 through the detector air inlet 201. It can be understood that in this embodiment, the cooperation of the air duct nozzles 111 and the front cover air duct 112 can guide the cold air in the air inlet area A, thereby facilitating its entry into the detector cavity 2111.

[0077] Continue to refer to Figure 2 As shown in the above embodiment, preferably, both the air inlet and outlet of the fan 5 are equipped with noise-reducing ducts 51. These noise-reducing ducts 51 are made of noise-reducing cotton, which can reduce the noise generated during airflow and has minimal impact on airflow.

[0078] like Figure 7 As shown, in the above embodiment, preferably, air inlet ducts 104 are provided at the bottom of the rear cover 12 and the bottom of the side cover 13, thereby enabling the extraction of external cold air from multiple directions and improving air intake efficiency. Furthermore, more preferably, the top of the outer cover 1 is provided with multiple fan mounting holes 103, each fan mounting hole 103 housing a fan 6, with some fans 6 corresponding to the air intake area A and others corresponding to the exhaust area D, thereby improving exhaust efficiency.

[0079] like Figure 8As shown, based on the above embodiments, this invention also provides a static CT system, including the aforementioned static CT device 100, CT scanning bed 200, and control unit 300. The CT scanning bed 200 is disposed on one side of the static CT device 100 and can move horizontally towards or away from the static CT device 100 to move the patient within the central aperture 102 of the static CT device. The control unit 300 is connected to the static CT device 200 to control the exposure sequence of each X-ray tube in the X-ray source ring 3, and correspondingly controls each detector module 21 of the detector ring 2 to acquire CT images, thereby realizing a CT scan of the patient.

[0080] It should be noted that the above embodiments are merely illustrative examples. The technical solutions of each embodiment can be combined, and all are within the protection scope of this invention.

[0081] It should be understood that the terms "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] The above provides a detailed description of a noise-reducing and temperature-controlled static CT device and system provided by the present invention. Any obvious modifications made by those skilled in the art without departing from the essence of the present invention will constitute an infringement of the patent rights of the present invention and will incur corresponding legal liability.

Claims

1. A static CT device with noise reduction and temperature control, characterized in that... include: The outer cover is formed by the front cover plate, the rear cover plate and the side cover plates, and has a hollow inner cavity, and a central hole is formed in the center of the outer cover; A detector ring is stationary within the hollow inner cavity, with the central axis of the detector ring coinciding with the central axis of the central hole. A radiation source ring is stationary around the outside of the detector ring, with the central axis of the radiation source ring coinciding with the central axis of the central hole, so that each radiation source can emit X-rays toward the detector ring; An inverter ring is stationary around the outside of the detector ring, with the central axis of the inverter ring coinciding with the central axis of the central hole; and, in the axial direction of the central hole, the inverter ring is located on one side of the X-ray source ring. The fan is installed inside the hollow cavity of the outer cover and located on the inner bottom surface of the outer cover; A fan is installed in a fan mounting hole on the top of the outer casing; The area between the front cover and the outer wall of the radiation source ring forms an air intake area; the area where the detector ring is located forms a first heat dissipation area; the area where the inverter ring is located forms a second heat dissipation area; the area between the rear cover and the detector ring and the inverter ring forms an exhaust area; both the air intake area and the exhaust area are connected to the fan mounting hole. A first air duct is formed from the air inlet area to the fan mounting hole of the outer casing, directly cooling the X-ray source ring; a second air duct is formed from the air inlet area through the first heat dissipation area and the second heat dissipation area, reaching the fan mounting hole of the outer casing, sequentially cooling the detector ring and the inverter ring; a third air duct is formed from the air inlet area through the first heat dissipation area and the second heat dissipation area, converging at the exhaust area and reaching the fan mounting hole of the outer casing, collecting and discharging heat, thereby entering multiple zones through multiple airflow channels to cool different components separately.

2. The static CT device as described in claim 1, characterized in that: The detector ring includes multiple detector modules, which are arranged in a ring around the axis of the central hole. Each of the detector modules has a detector air inlet on the side facing the front cover, and each detector air inlet is equipped with a detector fan.

3. The static CT device as described in claim 2, characterized in that... The detector module includes: The detector housing has a hollow detector cavity, the detector air inlet is connected to the detector cavity, and the detector cavity is also provided with a detector air outlet; A detector chip is disposed within the detector cavity for detecting X-rays; A cooling chip, wherein the cold side of the cooling chip is attached to the detector chip, and the hot side of the cooling chip is located inside the detector cavity; The cold side of the cooling chip always maintains a preset temperature, and the hot side of the cooling chip dissipates heat as the outside cold air flows along the second or third air duct.

4. The static CT device as described in claim 3, characterized in that... Also includes: A controller, connected to the fan, is used to control the fan's rotational speed; A temperature control probe is disposed on the hot surface of the cooling chip and connected to the controller; The fan is connected to the controller, which receives the current hot surface temperature from the temperature control probe and controls the fan speed so that the current hot surface temperature is not lower than the preset condensation temperature of the cooling chip.

5. The static CT device as described in claim 2, characterized in that: The inverter ring includes multiple inverters, which are arranged in a ring around the axis of the central hole, so that each inverter corresponds to each detector module. Each inverter is equipped with an inverter fan to blow airflow from the second heat dissipation area to the exhaust area.

6. The static CT device as described in claim 1, characterized in that: The fan is equipped with noise-reducing ducts at both its air inlet and outlet.

7. The static CT device as described in claim 2, characterized in that: The inner surface of the front cover is provided with multiple air duct nozzles, which are arranged in a ring around the central axis of the central hole and correspond one-to-one with the air inlets of the multiple detectors. The inner surface of the front cover plate is also formed with a front cover air duct, which is connected to a plurality of air duct nozzles. The air outlet of the fan faces the front cover air duct so that cold air from the outside can enter the air duct nozzles through the front cover air duct.

8. The static CT device as described in claim 1, characterized in that: Air inlet ducts are provided at the bottom of both the rear cover and the side cover.

9. The static CT device as described in claim 1, characterized in that: The top of the outer cover has multiple fan mounting holes, and each fan is installed in each fan mounting hole; One group of fans corresponds to the air intake area, and the other group of fans corresponds to the air exhaust area.

10. A static CT system, characterized in that... include: The static CT device according to any one of claims 1 to 9; A CT scanning bed is positioned on one side of the static CT device and can move horizontally toward or away from the static CT device to move the patient within the central aperture of the static CT device. A control unit is connected to the static CT device to control the static CT device to perform CT scans on the patient.

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