X-ray CT device

Abstract

This invention provides an X-ray CT apparatus. The X-ray CT apparatus of this embodiment includes: an annular rotating part with a ventilation section for airflow; an X-ray generating device disposed on the rotating part and emitting X-rays toward a subject; an X-ray detecting device disposed on the rotating part opposite to the X-ray generating device and detecting X-rays passing through the subject; a stand disposed on the ground, the stand also having a central frame rotatably supporting the rotating part; and an air guide located on the exhaust side of the ventilation section of the rotating part, the air guide directing the air out in a predetermined direction. This invention effectively utilizes the kinetic energy of the rotating part and reduces the noise of the X-ray CT apparatus.

Description

Technical Field

[0001] This invention relates to an X-ray CT apparatus, and more particularly to an X-ray CT apparatus capable of reducing noise. Background Technology

[0002] X-ray CT scanners (computed tomography) include an X-ray tube that generates X-rays. This tube generates a significant amount of heat after prolonged operation, which greatly affects the normal operation of the X-ray CT scanner. Therefore, it is necessary to dissipate the heat generated by the tube. In existing technology, X-ray CT scanners dissipate heat through a fan mounted on the upper part of the gantry.

[0003] However, X-ray CT devices generate significant noise when cooled by fans, thus requiring a device that can reduce noise and effectively utilize the kinetic energy of the rotating parts. Summary of the Invention

[0004] The purpose of this invention is to provide an X-ray CT device that can reduce noise.

[0005] To achieve the above objectives, the X-ray CT apparatus according to embodiments of the present invention includes: an annular rotating part having a ventilation part for airflow; an X-ray generating device disposed on the rotating part and emitting X-rays toward a subject; an X-ray detecting device disposed on the rotating part opposite to the X-ray generating device and detecting X-rays passing through the subject; a stand disposed on the ground, the stand also having a central frame rotatably supporting the rotating part; and an air guide located on the exhaust side of the ventilation part of the rotating part, the air guide directing the air out in a predetermined direction.

[0006] This invention enables the effective utilization of the kinetic energy of the rotating part and reduces the noise of the X-ray CT device. Attached Figure Description

[0007] Figure 1 This is a block diagram illustrating the structure of an X-ray CT device according to an embodiment of the present invention;

[0008] Figure 2 This is a three-dimensional schematic diagram showing the internal structure of the X-ray CT device according to the first embodiment of the present invention;

[0009] Figure 3 It means from Figure 2 A schematic diagram of the cross-section taken from the section in the diagram;

[0010] Figure 4 This is a perspective view showing the rotating part of the X-ray CT apparatus of the present invention;

[0011] Figure 5 This is a three-dimensional schematic diagram showing the air guide shroud of the X-ray CT device in the first embodiment of the present invention;

[0012] Figure 6 This is a schematic diagram of the internal structure of the X-ray CT device according to the second embodiment of the present invention. Figure 6 (a) is a schematic diagram when the inner diameter of the air guide shroud is larger than the outer diameter of the middle frame. Figure 6 (b) is a schematic diagram when the inner diameter of the air guide is smaller than the outer diameter of the middle frame;

[0013] Figure 7 This is a schematic diagram of the internal structure of the X-ray CT device according to the third embodiment of the present invention. Detailed Implementation

[0014] The following is for reference Figures 1 to 7 The embodiments of the X-ray CT apparatus according to the present invention will be described. Furthermore, the same symbols are used to label the same structures in each figure.

[0015] For clarity, coordinate axes are shown in the diagram. The X-axis represents the depth direction of the X-ray CT scanner (also known as the front-to-back direction). The Y-axis represents the longitudinal direction of the X-ray CT scanner (also known as the vertical direction). The Z-axis represents the lateral direction of the X-ray CT scanner (also known as the left-to-right direction). The X-axis arrow points in the direction of... Figure 1 The direction inside (+X direction) is considered the front, the direction the Y-axis arrow points (+Y direction) is considered the top, and the direction the Z-axis arrow points (+Z direction) is considered the right. The opposite directions are the rear (-X direction), bottom (-Y direction), and left (-Z direction). The X, Y, and Z directions are orthogonal to each other. Hereinafter, when the +X (+Y, +Z) and -X (-Y, -Z) directions are not distinguished, they are collectively referred to as the X-axis (Y-axis, Z-axis) direction. Furthermore, in each figure, for ease of explanation, the structure is appropriately enlarged, reduced, or omitted.

[0016] (First Implementation)

[0017] Figure 1 This is a block diagram illustrating the structure of the X-ray CT device 1 according to the present invention.

[0018] like Figure 1 As shown, an X-ray CT apparatus 1 for medical diagnosis is illustrated as an example. The X-ray CT apparatus 1 includes: a stage 2, a rotating part 4, a control console 8, and an examination bed (not shown).

[0019] like Figure 1As shown, the stand 2 is set on the ground, and the rear side of the stand 2 has a component (middle frame) that functions as a support frame, as described later. An annular rotating part 4 is provided on the inner side of the stand 2. The rotating part 4 is supported by the stand 2 in a rotatable manner, and an opening 13 is provided at the center of the rotating part 4 for inserting the subject P placed on the top plate F of the examination table.

[0020] An X-ray generating device 11 (e.g., an X-ray tube) and an X-ray detection device 12 are arranged facing each other with the opening 13 as the center on the rotating part 4. When in operation, the X-ray generating device 11 emits X-rays towards the subject P. When in operation, the X-ray detection device 12 detects the X-rays emitted from the X-ray generating device 11 that pass through the subject P inserted into the opening 13 and converts them into electrical signals. The electrical signals are amplified by a data collection unit (DAS) 14 and converted into digital data. The digital data (projection data) from the data collection unit 14 is transmitted to the control console 8 via a data transmission unit 15.

[0021] The data transmission unit 15 is a structure that transmits projection data from the rotating part 4 to the control console 8 without contact. It includes a transmitting part 151 provided on the rotating part 4 and a receiving part 152 provided on the platform 2, and supplies the data received by the receiving part 152 to the control console 8.

[0022] In addition, a collector ring 16 and an X-ray control unit 17 are provided in the rotating part 4, and a stage control unit 18 is provided in the stage 2.

[0023] On the other hand, the console 8 constitutes a computer system, and the projection data from the data transmission unit 15 is supplied to the preprocessing unit 81. In the preprocessing unit 81, the projection data is preprocessed, such as data correction, and then output to the bus 82.

[0024] The system control unit 83, input unit 84, data storage unit 85, reconstruction processing unit 86, data processing unit 87, display unit 88, etc. are connected to the bus 82, and the high voltage generation unit 89 is connected to the system control unit 83.

[0025] The system control unit 83 functions as the main controller, controlling the operation of various parts of the control console 8, the platform control unit 18, and the high-voltage generation unit 89. The data storage unit 85 stores data such as tomographic images, and the reconstruction processing unit 86 reconstructs 3D image data based on projection data. The data processing unit 87 processes the image data stored in the data storage unit 85 or the reconstructed image data. The display unit 88 displays the images obtained through image data processing.

[0026] The input unit 84 includes a keyboard, mouse, etc., and is operated by an operator to perform various settings based on data processing. Furthermore, the input unit 84 inputs various information such as the status of the subject P and the inspection method.

[0027] The high-voltage generating unit 89 controls the X-ray control unit 17 via the slip ring 16 and supplies power to the X-ray generating device 11, providing the necessary power (tube voltage, tube current) for X-ray irradiation. The X-ray generating device 11 generates an X-ray beam that diffuses in two directions: a slicing direction parallel to the body axis of the subject P and a channel direction orthogonal to this direction. Sometimes the diffusion angle of the X-ray beam in the slicing direction is called the cone angle, and the diffusion angle in the channel direction is called the fan angle.

[0028] Figure 2 This is a perspective view showing the internal structure of the X-ray CT apparatus 1 according to the first embodiment of the present invention. To more clearly illustrate the structure of the X-ray CT apparatus 1, Figure 2 The image only shows a portion of the platform's structure and a simplified representation of the structure of some components.

[0029] like Figure 2 As shown, the rotating part 4 of the X-ray CT apparatus 1 has multiple rotating parts arranged around its inner circumferential side, such as an X-ray generating device 11 and an X-ray detection device 12. The rotating parts are spaced apart by a certain interval. The X-ray generating device 11 and the X-ray detection device 12, as rotating parts, are arranged facing each other on the rotating part 4. The X-ray detection device 12 includes multiple arrays of detection elements, such as a scintillator array and a photodiode array, arranged along an arc centered on the focal point of the X-ray generating device 11.

[0030] The rotating part 4 has a ventilation part 41 that allows air to flow. The rear side of the rotating part 4 in the depth direction serves as the exhaust side of the ventilation part 41, and the outer peripheral side of the rotating part 4 in the circumferential direction serves as the intake side of the ventilation part 41.

[0031] The X-ray CT apparatus 1 also includes an air guide section 5, which is located on the exhaust side of the ventilation section 41 of the rotating section 4, i.e., on the rear side in the depth direction of the rotating section 4. The air guide section 5 communicates with the rotating section 4 to guide the direction of the air discharged from the exhaust side of the rotating section 4, and discharges the air and the heat flowing with the air to the outside of the X-ray CT apparatus 1 through the exhaust port described later. In addition, in order to better reduce noise, the air guide section 5 discharges air in a predetermined direction L (e.g., from the upper side of the X-ray CT apparatus 1). This predetermined direction L is such that the subject P in the X-ray CT apparatus 1 is less likely to feel the noise. By setting the air guide section 5, the hot air discharged from the ventilation section 41 can be guided, thereby dissipating heat with higher exhaust efficiency. Discharging the hot air in the predetermined direction L allows the hot air to be discharged to the outside of the X-ray CT apparatus 1 with lower noise.

[0032] The rear side of the platform 2 has a roughly annular middle frame 21. The middle frame 21 is located behind the rotating part 4 and the air guide part 5. The middle frame 21 supports the air guide part 5 and supports the rotating part 4 in a rotatable manner.

[0033] Below, through Figure 3 and Figure 4 The specific structure of a ventilation section 41 according to an embodiment of the present invention will be described.

[0034] Figure 3 It means from Figure 2 The diagram shows a cross-section taken from section H, or in other words, a cross-sectional view of the X-ray CT device 1 viewed from the transverse direction. Figure 3 For clarity, the rest of the stand 2 is omitted, and only the middle frame 21 is shown. Additionally, Figure 3 The simplified or omitted representation of the structure of some components.

[0035] Figure 4 This is a perspective view showing the rotating part 4 of the X-ray CT apparatus 1 of the present invention. Figure 4 This is a view taken from the rear of the rotating part 4.

[0036] like Figure 3 , Figure 4 As shown, the rotating part 4 has a base part 42 formed in an annular shape, and a flange protruding a certain distance forward is formed on the outer periphery of the base part 42. The flange is formed in such a way that it extends a complete circle along the outer periphery of the base part 42.

[0037] like Figure 3 As shown, the X-ray generating device 11 and the X-ray detecting device 12 are fixed facing each other on the front-facing end face of the base part 42 and are surrounded by the flange of the rotating part 4.

[0038] like Figure 4 As shown, the ventilation section 41 of the rotating part 4 is composed of multiple air inlets 43, multiple ventilation openings 44, and multiple fan blades 45.

[0039] Multiple air inlets 43 are formed along the outer periphery of the rotating part 4 (i.e., formed on the flange), and each air inlet 43 is spaced apart by a distance. For example, the multiple air inlets 43 can be formed as rectangular holes, but they can also be round holes, mesh-like, etc.

[0040] Multiple vents 44 are formed on the rear side of the rotating part 4, that is, on the side facing the air guide part 5 and the middle frame 21 of the platform 2. Specifically, multiple vents 44 are formed on the base part 42, and each vent 44 is spaced apart by a distance. For example, the multiple vents 44 can be formed as rectangular holes, but they can also be round holes, grids, etc.

[0041] Multiple fan blades 45 are respectively disposed at multiple vents 44, specifically on the side of the base portion 42 facing the middle frame 21 of the frame 2. The fan blades 45 disposed at the corresponding vents 44 are used to exhaust air from the vents 44. Each fan blade 45 is formed to be inclined to the rearward side, and is inclined in such a way that air flows to the rearward side (i.e., the air guide 5) when the rotating part 4 rotates in the rotation direction T. The edges of the multiple fan blades 45 near the center side of the rotating part 4 are formed with a circular inner diameter. When the rotating part 4 is working, the fan blades 45 rotate with the rotating part 4, and each fan blade 45 pushes the air in the rotation direction T to generate a vortex airflow, and causes the air to flow to the rearward air guide 5. As air flows through the air guide section 5 at the vent 44, a negative pressure is created at the vent 44. Cold air flowing outward from the rotating part 4 enters from the air inlet 43, carrying away the heat generated by the various components in the rotating part 4. The cold air is thus transformed into hot air and discharged through the vent 44 to the air guide section 5. The air guide section 5 collects and guides this hot air. As the rotating part 4 continues to rotate, hot air is continuously discharged to the air guide section 5, increasing the air pressure in the air guide section 5. As a result, the hot air is discharged from the exhaust port of the air guide section 5, which will be described later. In other words, the kinetic energy of the rotating part 4 during rotation causes the air to circulate continuously. The heat of the rotating part components, such as the X-ray generating device 11, mounted on the base 42 of the rotating part 4 is carried away and discharged to the outside, thereby achieving the function of heat dissipation for the rotating part components.

[0042] Furthermore, the number of air inlets 43 is not specifically limited, as long as it can meet the requirement of sufficient cold air flowing in when the rotating part 4 is rotating. The number of vents 44 is not specifically limited, as long as it can meet the requirement of timely exhaust of hot air when the rotating part 4 is rotating.

[0043] Furthermore, the multiple vents 44 can be formed in different shapes and sizes. For example, when the component at the vent is a component that generates a large amount of heat (e.g., X-ray generating device 11), the size of the vent can be increased to increase the airflow through it, thereby quickly removing the heat. When the component at the vent is a component that generates a small amount of heat, the size of the vent can be reduced to avoid unnecessary air resistance generated by the rotating part 4.

[0044] Alternatively, the multiple fan blades 45 can be integrally formed with the base portion 42 of the rotating portion 4, or each fan blade 45 can be fixed to the rotating portion 4 as a separate component by connecting components such as bolts.

[0045] With the structure of the ventilation section 41 described above, the kinetic energy of the rotating section 4 can be utilized efficiently, and compared with the cooling method of a fan, the noise can be reduced because the original fan structure has been removed.

[0046] Below, through Figure 3 and Figure 5 The specific configuration of the air guide 5 according to the first embodiment of the present invention will be described.

[0047] Figure 5 This is a perspective view of the air guide shroud 51 of the X-ray CT apparatus 1 in the first embodiment of the present invention. Figure 5 This is a view taken from the front of the air deflector 51.

[0048] like Figure 5 As shown, the air guide shroud 51 is formed in an annular shape. A flange protruding forward a certain distance is formed on the outer periphery of the air guide shroud 51, and a flange protruding forward a certain distance is also formed on the inner periphery of the air guide shroud 51. Both flanges are formed to extend a complete circumference around the air guide shroud 51. Thus, a groove 52 (a specific example of a receiving portion) is formed on the front side of the air guide shroud 51 to receive air flowing in from the rotating part 4 and to accommodate (receive) the fan blade portion 45 of the rotating part 4. An exhaust port 53 is formed on the upper side of the air guide shroud 51 to discharge air in a predetermined direction L. Specifically, the exhaust port 53 is formed on the outer peripheral flange of the air guide shroud 51 and is formed to discharge air in a predetermined direction L (upward).

[0049] like Figure 3 As shown, the air guide shroud 51 is fixed to the middle frame 21 of the frame 2. For example, it can be fixed by welding the front-facing end face of the middle frame 21 to the rear-facing end face of the air guide shroud 51. However, this is not a limitation, and it can also be fixed by bolts, riveting, welding, snap-fitting, etc. The air guide shroud 51 is arranged with the groove 52 facing the rotating part 4. The air guide shroud 51 and the rotating part 4 are fitted together in the depth direction, and the groove 52 functions as a component to accommodate (receive) the fan blade part 45 of the rotating part 4. Thus, the annular closed space formed by the annular air guide shroud 51 with the groove 52 and the rotating part 4 constitutes the air guide part 5.

[0050] The air guide 5, formed by the air guide shroud 51 and the rotating part 4, directs air out in a predetermined direction L. This prevents the hot air discharged from the vent 44 of the rotating part 4 from flowing directly and irregularly backward over a large area. Instead, the hot air flows along the annular space formed by the groove 52 of the air guide shroud 51 to the exhaust port 53 and is discharged to the outside in the predetermined direction L. Since the air discharged from the vent 44 of the rotating part 4 carries heat, it tends to rise. Therefore, by forming the exhaust port 53 above the air guide shroud 51, the hot air can be discharged more concentratedly from above, thus improving the efficiency of hot air discharge. In addition, since the exhaust port 53 is located at the top, the noise during air discharge is less likely to diffuse downward, thus further reducing noise.

[0051] In addition, such as Figure 3 As shown, in order to further facilitate the more efficient discharge of hot air from the vent 44 of the rotating part 4 along the prescribed direction L, the air guide shroud 51 is installed from... Figure 3 The shape shown is sloping, narrower at the bottom and wider at the top, when viewed laterally. Specifically, the end face of the air guide shroud 51 facing the rotating part 4 is parallel to a plane (YZ plane, i.e., a plane formed by the Y-axis and Z-axis) orthogonal to the rotation center P of the rotating part 4. Furthermore, when viewed laterally, the air guide shroud 51 is shaped such that the dimension S1 in the upper depth direction is larger than the dimension S2 in the lower depth direction. The end face of the air guide shroud 51 facing the middle frame 21 of the platform 2 is inclined in the depth direction relative to the end face facing the rotating part 4 (or the YZ plane). Because the slot 52 is shaped with a small lower space and a large upper space, the hot air discharged from the vent 44 is guided upwards as much as possible through the shape of the slot 52 of the air guide shroud 51, allowing the hot air to flow upwards more quickly.

[0052] According to the above embodiment, the air guide 5 located on the exhaust side of the rotating part 4 can exhaust hot air in a predetermined direction L.

[0053] In addition, such as Figure 3 and Figure 5 As shown, to prevent foreign objects or moisture from entering the air guide shroud 51 and causing a decrease in ventilation efficiency, a protective pad 54 is provided at the exhaust port 53 of the air guide shroud 51. The protective pad 54 can be made of a breathable and absorbent material.

[0054] In addition, such as Figure 3 and Figure 5 As shown, the exhaust vent 53 can be composed of multiple round holes to further prevent foreign objects from entering the inner side of the air guide shroud 51 through the exhaust vent 53. However, the exhaust vent 53 can also be other shapes, such as rectangular, grid-like, etc.

[0055] Through the above embodiments, the kinetic energy generated by the rotating part of the X-ray CT device during rotation is utilized to continuously discharge the heat generated by the rotating part into the air guide section, and the air guide section guides the hot air out of the X-ray CT device in a predetermined direction. This effectively utilizes the kinetic energy of the rotating part and reduces the noise generated during heat dissipation.

[0056] (Second Implementation)

[0057] Below, through Figure 6 The internal structure of the X-ray CT apparatus 1 according to the second embodiment of the present invention will be described.

[0058] The parts that are the same as in the first embodiment will not be described again in this embodiment. Only the different parts will be described. All other parts not described are the same as or equivalent to those in the first embodiment.

[0059] Figure 6 This is a schematic diagram of the internal structure of the X-ray CT device 1 according to the second embodiment of the present invention. Figure 6 (a) is a schematic diagram when the inner diameter S3 of the air guide shroud 51 is larger than the outer diameter S4 of the middle frame 21. Figure 6 (b) is a schematic diagram when the inner diameter S3 of the air guide shroud 51 is smaller than the outer diameter S4 of the middle frame 21. Figure 6 This is a schematic diagram viewed from a horizontal direction, and to more clearly illustrate the differences in this embodiment, [the following will be shown]. Figure 6 The structure of each component is simplified. The dashed line represents the outer outline of the middle frame 21, the thinner solid line represents the air guide shroud 51 (where the broken solid line schematically represents the exhaust port 53), and the thicker solid line represents the rotating part 4.

[0060] like Figure 6 As shown, compared to the first embodiment, in order to install a larger rotating part, the dimension a in the depth direction of the rotating part 4 will be formed to be larger. In this case, in order to ensure the overall dimension b of the platform 2, the structure of the middle frame 21 of the platform 2 needs to be changed.

[0061] like Figure 6 As shown in (a), when the middle frame 21 already has sufficient structural strength and does not require an excessively large design, the middle frame 21 can be miniaturized. Figure 6In (a), the middle frame 21 is formed such that its outer diameter S4 is smaller than the inner diameter S3 of the air guide shroud 51. In this manner, the middle frame 21 is positioned on the inner periphery of the air guide shroud 51, avoiding the multiple fan blades 45 and the air guide shroud 51. Compared to the first embodiment, even when the dimension a in the depth direction of the rotating part 4 increases, the middle frame 21 can be closer to the rotating part 4 in the depth direction and accommodated on the inner periphery of the air guide shroud 51, so the overall dimension b of the frame 2 does not change. At this time, the air guide shroud 51 is fixed to the outer periphery of the middle frame 21 by a fixing method (welding, etc.) similar to that in the first embodiment.

[0062] like Figure 6 As shown in (b), when the middle frame 21 cannot be reduced in order to maintain sufficient structural strength, an opening design such as a clearance groove can be made on the middle frame 21 to avoid the fan blade portion 45. Figure 6 In (b), the inner diameter S3 of the air guide shroud 51 is smaller than the outer diameter S4 of the middle frame 21, and the middle frame 21 has a relief groove 55 extending circumferentially around the middle frame 21 in the depth direction. The relief groove 55 is used to accommodate multiple fan blades 45, and the relief groove 55 is formed in a rearward recessed manner. An air guide shroud 51 (or air guide plate) is provided on the end face of the relief groove 55 facing the rotating part 4. In this embodiment, the air guide shroud 51 consists of two annular air guide plates respectively provided on the outer peripheral side of the multiple fan blades 45 away from the rotation center P of the rotating part 4 and on the inner peripheral side close to the rotation center P of the rotating part 4. One end of each annular air guide plate facing the middle frame 21 in the depth direction is fixed to the middle frame 21, and the other end facing the rotating part 4 in the depth direction is tightly fitted with the end face of the rotating part 4 facing the middle frame 21. Thus, the air guide section 5 is composed of a clearance groove 55 formed on the middle frame 21, an annular air guide shroud 51 (or air guide plate) fixed on the middle frame 21, and an annular enclosed space formed by the rotating section 4. An exhaust port 53 is formed on the upper side of the air guide shroud 51 (or air guide plate) in the longitudinal direction to guide hot air in a predetermined direction L. Compared to the first embodiment, even when the dimension a in the depth direction of the rotating section 4 increases, the middle frame 21, due to the clearance groove 55, can be closer to the rotating section 4 in the depth direction, and the overall dimension b of the platform 2 will not change. At this time, the air guide shroud 51 is fixed to the end face of the middle frame 21 facing the rotating section 4 in the depth direction by a fixing method (welding, etc.) similar to that in the first embodiment.

[0063] By modifying the structure of the middle frame 21 in this embodiment, the overall size b of the platform 2 from the front side of the rotating part 4 to the rear side of the middle frame 21 is kept the same as in the first embodiment. This allows the dimension a in the depth direction of the rotating part 4 to be increased so that a larger rotating part component can be installed without changing the overall size b of the platform 2 of the X-ray CT device 1. Furthermore, the kinetic energy of the rotating part 4 can be used to achieve a low-noise heat dissipation effect.

[0064] (Third Implementation)

[0065] Below, through Figure 7 The internal structure of the X-ray CT apparatus 1 according to the third embodiment of the present invention will be described.

[0066] The parts that are the same as in the first embodiment will not be described again in this embodiment. Only the different parts will be described. All other parts not described are the same as or equivalent to those in the first embodiment.

[0067] Figure 7 This is a schematic diagram of the internal structure of the X-ray CT device 1 according to the third embodiment of the present invention. Figure 7 This is a view taken from a horizontal direction. To more clearly illustrate the structure of the X-ray CT apparatus 1, Figure 7 The image only shows a portion of the platform's structure and a simplified representation of the structure of some components.

[0068] In this embodiment, unlike the first embodiment, it is not necessary to set up a separate air guide shroud 51 to exhaust hot air.

[0069] like Figure 7 As shown, two annular sealing plates 59 are respectively provided on the outer periphery of the multiple fan blades 45 away from the rotation center P of the rotating part 4 and on the inner periphery of the multiple fan blades 45 near the rotation center P of the rotating part 4. The end faces of the two sealing plates 59 facing the middle frame 21 in the depth direction are fixed to the end faces of the middle frame 21 facing the fan blades 45 in the depth direction. The end faces of the two sealing plates 59 facing the rotating part 4 in the depth direction are tightly fitted with the end faces of the rotating part 4 facing the middle frame 21 in the depth direction, thereby forming an annular closed space between the vent 44 of the rotating part 4 and the middle frame 21 to accommodate the multiple fan blades 45. The air guide 5 is composed of the middle frame 21, the annular sealing plates 59 fixed on the middle frame 21, and the annular closed space formed by the rotating part 4. An exhaust port 58 is formed on the upper side of the sealing plate 59 in the longitudinal direction on the outer periphery side to guide hot air in a predetermined direction L.

[0070] In this embodiment, when the rotating part 4 is working, the fan blades 45 rotate along with the rotating part 4. Each fan blade 45 pushes the air to generate a vortex airflow and directs the airflow to the air guide 5. As the air at the vent 44 flows along the air guide 5, a negative pressure is formed at the vent 44. Cold air from the outer periphery of the rotating part 4 flows in from the air inlet 43, carrying away the heat generated by the various components in the rotating part 4. The cold air is thus turned into hot air and is discharged to the air guide 5 through the vent 44. The air guide 5 collects and guides this hot air. As the rotating part 4 continues to rotate, hot air is continuously discharged to the air guide 5, increasing the air pressure in the air guide 5. As a result, the hot air is discharged from the exhaust port 58 of the air guide 5 in a predetermined direction L. In other words, the kinetic energy of the rotating part 4 during rotation causes the air to circulate continuously. The heat of the rotating part components, such as the X-ray generating device 11, mounted on the base 42 of the rotating part 4 is carried away and discharged to the outside, thereby achieving the function of heat dissipation for the rotating part components.

[0071] Furthermore, the number of sealing plates 59 is not specifically limited, as long as it can ensure that an annular closed space is formed between the middle frame 21, the sealing plates 59, and the rotating part 4. It can be two annular sealing plates, or it can be two annular structures formed by splicing multiple sheet-like sealing plates.

[0072] According to the above embodiment, the air guide 5 located on the exhaust side of the rotating part 4 can guide hot air and exhaust the hot air in a predetermined direction L.

[0073] The heat dissipation structure of the X-ray CT apparatus, as described in at least one of the above embodiments, consists of an annular rotating section with a ventilation section for airflow and an air guide section located on the exhaust side of the ventilation section that directs air out in a predetermined direction. This allows for efficient utilization of the kinetic energy of the rotating section. Furthermore, by eliminating the fan design, noise caused by this component can be directly eliminated, and the number of components requiring maintenance in the X-ray CT apparatus is reduced, increasing efficiency during routine examinations.

[0074] While several embodiments of the present invention have been described, these embodiments are merely illustrative and not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, with various omissions, substitutions, combinations, and modifications possible without departing from the spirit of the invention. These embodiments and their variations are all included within the scope and spirit of the invention, and are encompassed within the scope of the claims and their equivalents.

Claims

1. An X-ray CT device, characterized in that, include: The annular rotating part has a ventilation section formed thereon to allow air to flow; An X-ray generating device is mounted on the rotating part and emits X-rays toward the subject. An X-ray detection device is disposed on the rotating part facing the X-ray generating device, and detects X-rays passing through the subject. A platform is set on the ground, and a middle frame is provided on the platform to rotatably support the rotating part; as well as An air guide section, disposed on the exhaust side of the ventilation section of the rotating part, guides the air out in a predetermined direction. The air guide section is formed by an annular closed space created by an air guide cover with a receiving part and the rotating part. The air guide cover is arranged such that the receiving part faces the rotating part. An exhaust port is formed on the upper side of the air guide shroud to direct air in a specified direction. The end face of the air guide hood facing the rotating part is parallel to a plane orthogonal to the rotation center of the rotating part. The end face of the air guide hood facing the middle frame is inclined in the depth direction relative to the end face facing the rotating part. When viewed from the lateral direction, the air guide hood is formed in an inclined shape with the dimension in the depth direction of the upper side being larger than the dimension in the depth direction of the lower side.

2. The X-ray CT apparatus according to claim 1, characterized in that, The air guide cover has a protective pad located at the exhaust port to prevent foreign objects or moisture from falling into the air guide cover.

3. The X-ray CT apparatus according to claim 1, characterized in that, The air guide section has: Multiple ventilation openings are formed on the side of the rotating part facing the middle frame; Multiple air inlets are formed along the outer periphery of the rotating part; as well as Multiple fan blades are disposed at the vent and are inclined in such a way that the air flows toward the air guide as the rotating part rotates.

4. The X-ray CT apparatus according to claim 3, characterized in that, The multiple ventilation openings are formed in different sizes.

5. The X-ray CT apparatus according to claim 1, characterized in that, The inner diameter of the air guide shroud is larger than the outer diameter of the middle frame, and the air guide shroud is fixed to the outer peripheral side of the middle frame.

6. The X-ray CT apparatus according to claim 1, characterized in that, The exhaust vent is formed by multiple round holes.

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