CN114224370A - X-ray CT apparatus - Google Patents
X-ray CT apparatus Download PDFInfo
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- CN114224370A CN114224370A CN202011573038.XA CN202011573038A CN114224370A CN 114224370 A CN114224370 A CN 114224370A CN 202011573038 A CN202011573038 A CN 202011573038A CN 114224370 A CN114224370 A CN 114224370A
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- 238000009423 ventilation Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000013500 data storage Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4488—Means for cooling
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- High Energy & Nuclear Physics (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
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- Public Health (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention provides an X-ray CT apparatus. An X-ray CT apparatus according to an embodiment includes: an annular rotating part on which a ventilation part for making air flow is formed; an X-ray generating device that is provided on the rotating portion and emits X-rays to a subject; an X-ray detection device which is provided on the rotating unit so as to face the X-ray generation device and detects X-rays that have passed through the subject; a stand provided on the ground, the stand further having a middle frame rotatably supporting the rotating part; and a wind guide portion that is located on a discharge side of the ventilation portion of the rotating portion, the wind guide portion guiding out the air in a predetermined direction. The invention can effectively utilize the kinetic energy of the rotating part and reduce the noise of the X-ray CT device.
Description
Technical Field
The present invention relates to an X-ray CT apparatus, and more particularly, to an X-ray CT apparatus capable of reducing noise.
Background
An X-ray CT apparatus (electronic computed tomography apparatus) includes a bulb for generating X-rays, and the bulb generates a large amount of heat after a long time of operation, and the heat greatly affects the normal operation of the X-ray CT apparatus, so that the heat generated from the bulb needs to be discharged. In the related art, an X-ray CT apparatus radiates heat by a fan provided on an upper side of a gantry.
However, since the X-ray CT apparatus generates a large noise when the heat is dissipated by the fan, there is a need for an X-ray CT apparatus capable of effectively utilizing the kinetic energy of the rotating portion while reducing the noise.
Disclosure of Invention
The invention aims to provide an X-ray CT device capable of reducing noise.
In order to achieve the above object, an X-ray CT apparatus according to an embodiment of the present invention includes: an annular rotating part on which a ventilation part for making air flow is formed; an X-ray generating device that is provided on the rotating portion and emits X-rays to a subject; an X-ray detection device which is provided on the rotating unit so as to face the X-ray generation device and detects X-rays that have passed through the subject; a stand provided on the ground, the stand further having a middle frame rotatably supporting the rotating part; and a wind guide portion that is located on a discharge side of the ventilation portion of the rotating portion, the wind guide portion guiding out the air in a predetermined direction.
The invention can effectively utilize the kinetic energy of the rotating part and reduce the noise of the X-ray CT device.
Drawings
Fig. 1 is a block diagram showing a configuration of an X-ray CT apparatus according to an embodiment of the present invention;
fig. 2 is a schematic perspective view showing an internal configuration of an X-ray CT apparatus according to a first embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken from the cross-section in FIG. 2;
FIG. 4 is a perspective view showing a rotating part of an X-ray CT apparatus according to the present invention;
fig. 5 is a perspective view schematically showing a wind scooper of an X-ray CT apparatus according to a first embodiment of the present invention;
fig. 6 is a schematic view of an internal configuration of an X-ray CT apparatus according to a second embodiment of the present invention, where fig. 6(a) is a schematic view when an inner diameter of the wind-guiding cover is larger than an outer diameter of the middle frame, and fig. 6(b) is a schematic view when the inner diameter of the wind-guiding cover is smaller than the outer diameter of the middle frame;
fig. 7 is a schematic diagram illustrating an internal configuration of an X-ray CT apparatus according to a third embodiment of the present invention.
Detailed Description
An embodiment of an X-ray CT apparatus according to the present invention will be described below with reference to fig. 1 to 7. In the drawings, the same components are denoted by the same reference numerals.
For convenience of explanation, coordinate axes are shown in the drawings. The X-axis direction is a depth direction (also referred to as a front-back direction) of the X-ray CT apparatus. The Y-axis direction is a longitudinal direction (also referred to as an up-down direction) of the X-ray CT apparatus. The Z-axis direction is a lateral direction (also referred to as a left-right direction) of the X-ray CT apparatus. The direction in which the X-axis arrow faces, i.e., the direction (+ X direction) toward the back side in fig. 1, is defined as the front side, the direction (+ Y direction) in which the Y-axis arrow faces is the upper side, the direction (+ Z direction) in which the Z-axis arrow faces is the right side, and the opposite sides thereof, i.e., the back side (-X direction), the lower side (-Y direction), and the left side (-Z direction). The X, Y and Z directions are orthogonal to each other. Hereinafter, the + X (+ Y, + Z) direction and the-X (-Y, -Z) direction are collectively referred to as the X-axis (Y-axis and Z-axis) direction, unless otherwise specified. In the drawings, the structure is shown enlarged, reduced, or omitted as appropriate for convenience of explanation.
(first embodiment)
Fig. 1 is a block diagram showing a configuration of an X-ray CT apparatus 1 according to the present invention.
As shown in fig. 1, an X-ray CT apparatus 1 for medical diagnosis is shown as an example of the X-ray CT apparatus. The X-ray CT apparatus 1 includes: a gantry 2, a rotating unit 4, a console 8, and a bed (not shown).
As shown in fig. 1, the gantry 2 is installed on the ground, and a member (middle frame) functioning as a support frame (described later) is provided on the rear side of the gantry 2. An annular rotating portion 4 is provided inside the gantry 2, the rotating portion 4 is rotatably supported by the gantry 2, and an opening 13 for inserting the subject P placed on the top plate F of the bed is provided in the center of the rotating portion 4.
The rotating unit 4 is provided with an X-ray generation device 11 (for example, a bulb) and an X-ray detection device 12 which are disposed to face each other with the opening 13 as a center. The X-ray generation device 11 emits X-rays to the subject P in an operating state. The X-ray detector 12 detects X-rays output from the X-ray generator 11 and passing through the subject P inserted into the opening 13 in an operating state, and converts the X-rays into electrical signals. The electrical signals are amplified by a data acquisition unit (DAS)14 and converted into digital data. The digital data (projection data) from the data collection unit 14 is transmitted to the console 8 via the data transmission unit 15.
The data transfer unit 15 is configured to transfer projection data from the rotating unit 4 to the console 8 in a non-contact manner, includes a transmission unit 151 provided on the rotating unit 4 side and a reception unit 152 provided on the gantry 2, and supplies data received by the reception unit 152 to the console 8.
The rotating portion 4 is provided with a slip ring 16 and an X-ray control unit 17, and the gantry 2 is provided with a gantry control unit 18.
On the other hand, the console 8 constitutes a computer system, and the projection data from the data transfer section 15 is supplied to the preprocessing section 81. The preprocessing unit 81 performs preprocessing such as data correction on the projection data and outputs the result to the bus 82.
The system control unit 83, the input unit 84, the data storage unit 85, the reconstruction processing unit 86, the data processing unit 87, the display unit 88, and the like are connected to the bus 82, and the high voltage generation unit 89 is connected to the system control unit 83.
The system control unit 83 functions as a main controller and controls the operations of the respective units of the console 8, the gantry control unit 18, and the high voltage generation unit 89. The data storage unit 85 stores data such as tomographic images, and the reconstruction processor 86 reconstructs 3D image data from the 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 an image obtained by image data processing, and the like.
The input unit 84 includes a keyboard, a mouse, and the like, and is operated by an operator to perform various settings in addition to data processing. The input unit 84 inputs various information such as the state of the subject P and the examination method.
The high voltage generation unit 89 controls the X-ray control unit 17 via the slip ring 16, supplies power to the X-ray generation device 11, and supplies power (tube voltage, tube current) necessary for X-ray irradiation. The X-ray generation device 11 generates X-ray beams that are spread in two directions, a slice direction parallel to the body axis direction of the subject P and a channel direction orthogonal to this direction. The spread angle in the slice direction of the X-ray beam is sometimes referred to as the cone angle, and the spread angle in the channel direction is sometimes referred to as the fan angle.
Fig. 2 is a schematic perspective view showing an internal configuration of an X-ray CT apparatus 1 according to a first embodiment of the present invention. In order to more clearly show the structure of the X-ray CT apparatus 1, only a partial structure of the gantry is shown in fig. 2, and a simplified representation of the structure of a partial part is shown.
As shown in fig. 2, the rotating portion 4 of the X-ray CT apparatus 1 is provided with a plurality of rotating portion components, for example: an X-ray generation device 11, an X-ray detection device 12, and the like. The rotating parts are spaced at a predetermined interval. The X-ray generation device 11 and the X-ray detection device 12, which are rotating part components, are oppositely provided on the rotating part 4. The X-ray detection device 12 includes a plurality of detection element arrays including, for example, a scintillator array and a photodiode array, and is arranged along an arc centered on the focal point of the X-ray generation device 11.
The rotary unit 4 is formed with a ventilation portion 41 through which air can flow, and the rear side in the depth direction of the rotary unit 4 is defined as the discharge side of the ventilation portion 41, and the outer peripheral side in the circumferential direction of the rotary unit 4 is defined as the intake side of the ventilation portion 41.
The X-ray CT apparatus 1 further includes an air guide portion 5, the air guide portion 5 is provided on the exhaust side of the ventilation portion 41 of the rotating portion 4, that is, on the rear side in the depth direction of the rotating portion 4, and the air guide portion 5 communicates with the rotating portion 4 to guide the air discharged from the exhaust side of the rotating portion 4 in the direction, and discharges the air and the heat flowing with the air to the outside of the X-ray CT apparatus 1 through an air outlet described later. In order to reduce noise more effectively, the air guide unit 5 guides air in a predetermined direction L (for example, from the upper side of the X-ray CT apparatus 1) in which the noise is not easily sensed by the subject P in the X-ray CT apparatus 1. The hot air discharged from the ventilation part 41 can be guided by the provision of the air guide part 5, thereby dissipating heat with higher discharge efficiency. The hot air is guided in the predetermined direction L, and the hot air can be discharged to the outside of the X-ray CT apparatus 1 with lower noise.
The mount 2 has a substantially annular middle frame 21 on the rear side thereof, the middle frame 21 is located behind the rotating portion 4 and the air guide portion 5, and the middle frame 21 supports the air guide portion 5 and rotatably supports the rotating portion 4.
Next, a specific structure of the ventilation portion 41 according to the embodiment of the present invention will be described with reference to fig. 3 and 4.
Fig. 3 is a schematic sectional view of the X-ray CT apparatus 1 as viewed from a cross section H in fig. 2, or a cross section as viewed from a lateral direction. In fig. 3, the rest of the gantry 2 is omitted for clarity, and only the middle frame 21 is shown. In fig. 3, the structure of a part of the components is simplified or omitted.
Fig. 4 is a perspective view showing the rotating portion 4 of the X-ray CT apparatus 1 according to the present invention, and fig. 4 is a view seen from the rear side of the rotating portion 4.
As shown in fig. 3 and 4, the rotating portion 4 includes a base portion 42 formed in a ring shape, and a flange protruding forward by a predetermined distance is formed on the outer periphery of the base portion 42, and the flange is formed to extend completely around the outer periphery of the base portion 42.
As shown in fig. 3, the X-ray generation device 11 and the X-ray detection device 12 are fixed to the end surface of the base portion 42 facing the front side, and are surrounded by the flange of the rotating portion 4.
As shown in fig. 4, the ventilation portion 41 of the rotary portion 4 is formed of a plurality of air inlets 43, a plurality of ventilation openings 44, and a plurality of fan blade portions 45.
The plurality of air inlets 43 are formed along the outer peripheral side of the rotating portion 4 (i.e., formed on the flange), and the air inlets 43 are spaced apart from each other by a distance.
The plurality of ventilation openings 44 are formed on the rear side of the rotating portion 4, that is, on the side facing the air guide portion 5 and the middle frame 21 of the gantry 2, specifically, the plurality of ventilation openings 44 are formed on the base portion 42, and the ventilation openings 44 are spaced apart from each other by a distance.
The plurality of fan blade portions 45 are respectively provided at the plurality of ventilation openings 44, specifically, at a side of the base portion 42 facing the middle frame 21 of the stand 2. Fan portions 45 provided at the respective ventilation openings 44 for guiding out air from the ventilation openings 44. Each of the fan blade portions 45 is formed to be inclined toward the rear side and inclined in such a manner that the air flows toward the rear side (i.e., the air guiding portion 5) when the rotating portion 4 rotates in the rotating direction T. The edges of the plurality of vane portions 45 on the center side of the rotating portion 4 are formed to have a circular inner diameter. When the rotating portion 4 is operated, the fan blade portions 45 rotate with the rotation of the rotating portion 4, and each fan blade portion 45 pushes air in the rotating direction T to generate a swirling air flow and causes the air to flow toward the air guiding portion 5 on the rear side. As the air at the vent 44 flows to the air guide portion 5, a negative pressure is formed at the vent 44, the cold air on the outer side of the rotation portion 4 in the circumferential direction flows in from the air inlet 43, takes away heat generated by each component in the rotation portion 4, the cold air is changed into hot air and is discharged to the air guide portion 5 through the vent 44, the hot air is collected and guided by the air guide portion 5, and as the rotation portion 4 rotates continuously, the hot air is continuously discharged to the air guide portion 5, so that the air pressure in the air guide portion 5 is increased, and the hot air is discharged from an air outlet, which will be described later, of the air guide portion 5. That is, the air is circulated by the kinetic energy of the rotating portion 4 during rotation, and the heat of the rotating portion member, such as the X-ray generating device 11, provided on the base portion 42 of the rotating portion 4 is taken away and discharged to the outside, thereby achieving the function of dissipating the heat of the rotating portion member.
In addition, the number of the air inlets 43 is not particularly limited as long as it can satisfy a requirement that a sufficient amount of cold air flows in the rotary unit 4 while rotating. The number of the ventilation openings 44 is not particularly limited as long as the requirement that the hot air can be discharged in time when the rotary unit 4 rotates can be satisfied.
In addition, the plurality of vents 44 may be shaped in different sizes, for example: when the component at the vent is a component generating a large amount of heat (such as the X-ray generating device 11), the size of the vent at the position can be increased, so that the air volume passing through the position is increased, and the heat is rapidly taken away by the large air volume. When the component at the vent is a component generating a small amount of heat, the size of the vent at that position can be reduced, and unnecessary wind resistance of the rotating portion 4 can be avoided.
The plurality of fan blades 45 may be provided on the rotating portion 4 so as to be integrally formed with the base portion 42 of the rotating portion 4, or each fan blade 45 may be provided as a separate member and fixed to the rotating portion 4 by a fastening member such as a bolt.
The above-described structure of the ventilation portion 41 can efficiently utilize the kinetic energy of the rotating portion 4 during rotation, and can reduce noise by eliminating the original fan structure as compared with a method of radiating heat by a fan.
Next, a specific configuration of the air guide portion 5 according to the first embodiment of the present invention will be described with reference to fig. 3 and 5.
Fig. 5 is a schematic perspective view illustrating the wind scooper 51 of the X-ray CT apparatus 1 according to the first embodiment of the present invention, and fig. 5 is a view seen from the front side of the wind scooper 51.
As shown in fig. 5, the wind scooper 51 is formed in an annular shape, a flange protruding forward for a certain distance is formed on the outer periphery of the wind scooper 51, a flange protruding forward for a certain distance is also formed on the inner periphery of the wind scooper 51, and both the flanges are formed to extend completely for one turn in the circumferential direction of the wind scooper 51, so that a groove 52 (a specific example of a housing portion) for receiving the blade portion 45 of the rotating portion 4 while receiving the air flowing from the rotating portion 4 is formed on the front side of the wind scooper 51. An air outlet 53 for guiding air in a predetermined direction L is formed above the air guide cover 51, and specifically, the air outlet 53 is formed on an outer peripheral flange of the air guide cover 51 so as to discharge air in the predetermined direction L (upward).
As shown in fig. 3, the wind scooper 51 may be fixed to the middle frame 21 of the gantry 2, for example, by welding an end surface of the middle frame 21 facing the front side to an end surface of the wind scooper 51 facing the rear side. However, the present invention is not limited to this, and may be fixed by a bolt, caulking, welding, engagement, or the like. The wind scooper 51 is provided so that the groove 52 faces the rotating portion 4, the wind scooper 51 is attached to the rotating portion 4 in the depth direction, and the groove 52 functions as a member for accommodating (housing) the blade portion 45 of the rotating portion 4. Thus, the annular closed space formed by the annular wind scooper 51 with the groove 52 and the rotating portion 4 constitutes the wind guide portion 5.
The wind guide part 5 formed by the wind guide cover 51 and the rotary part 4 and guiding the air in the predetermined direction L prevents the hot air discharged from the vent 44 of the rotary part 4 from flowing in a large area to the rear randomly, and the hot air flows to the air outlet 53 along the annular space formed by the grooves 52 of the wind guide cover 51 and is discharged to the outside in the predetermined direction L. Since the air discharged from the ventilation opening 44 of the rotating portion 4 has heat and thus tends to rise, the hot air can be more intensively discharged from above by forming the air discharge opening 53 above the wind scooper 51, and thus the discharge efficiency of the hot air can be improved. Further, since the air outlet 53 is provided at the upper side, the noise is not easily diffused downward when the air is discharged, and the noise can be further reduced.
In addition, as shown in fig. 3, the wind scooper 51 is formed in an inclined shape having a narrow lower portion and a wide upper portion as viewed in the lateral direction shown in fig. 3 in order to further efficiently discharge the hot air discharged from the ventilation opening 44 of the rotating portion 4 in the predetermined direction L. Specifically, an end surface of the wind scooper 51 facing the rotating portion 4 is parallel to a plane (YZ plane, i.e., a plane including the Y axis and the Z axis) orthogonal to the rotation center P of the rotating portion 4, and the wind scooper 51 is formed such that a dimension S1 in the depth direction of the upper side is larger than a dimension S2 in the depth direction of the lower side as viewed in the lateral direction, and an end surface of the wind scooper 51 facing the center 21 of the gantry 2 is inclined in the depth direction with respect to an end surface facing the rotating portion 4 (or the YZ plane). Since the slot 52 is formed in a shape having a small lower space and a large upper space, the hot air discharged from the vent 44 is guided upward as much as possible by the shape of the slot 52 of the wind scooper 51, and the hot air flows upward more rapidly.
According to the above embodiment, the air guide portion 5 located on the discharge side of the rotary portion 4 can guide the hot air in the predetermined direction L.
As shown in fig. 3 and 5, a protection pad 54 is provided at the air outlet 53 of the air guide cover 51 to prevent foreign matter, moisture, and the like from entering the air guide cover 51 to cause a reduction in ventilation efficiency. The protective pad 54 may be made of a water absorbent material having good air permeability.
As shown in fig. 3 and 5, the air outlet 53 may be formed of a plurality of circular holes, and foreign matter and the like are further prevented from entering the inside of the air guiding cover 51 through the air outlet 53. However, the air outlet 53 may have another shape, such as a rectangular shape, a grid shape, etc.
In the above-described embodiment, the kinetic energy generated by the rotating portion of the X-ray CT apparatus during rotation is used to continuously discharge the heat generated by the rotating portion to the air guide portion, and the hot air is guided by the air guide portion to be guided out of the X-ray CT apparatus in a predetermined direction. This makes it possible to effectively utilize the kinetic energy of the rotation of the rotating portion and reduce the noise generated when the rotating portion is radiated.
(second embodiment)
Next, an internal configuration of an X-ray CT apparatus 1 according to a second embodiment of the present invention will be described with reference to fig. 6.
The same portions as those of the first embodiment will not be described in detail in this embodiment. Only different parts will be described. The other parts not described are the same as or equivalent to those of the first embodiment.
Fig. 6 is a schematic diagram of an internal configuration of an X-ray CT apparatus 1 according to a second embodiment of the present invention. Fig. 6(a) is a schematic view when the inner diameter dimension S3 of the wind scooper 51 is larger than the outer diameter dimension S4 of the center frame 21, and fig. 6(b) is a schematic view when the inner diameter dimension S3 of the wind scooper 51 is smaller than the outer diameter dimension S4 of the center frame 21. Fig. 6 is a schematic view seen from a lateral direction, and in order to more clearly show the different points in the present embodiment, the structures of the respective components in fig. 6 are shown in simplified form, with a broken line showing the outer contour of the center frame 21, a thin solid line showing the wind scooper 51 (in which the exhaust outlet 53 is schematically shown by a broken solid line), and a thick solid line showing the rotary portion 4.
As shown in fig. 6, in comparison with the first embodiment, the dimension a in the depth direction of the rotating section 4 is formed to be large in order to attach a larger rotating section, and in this case, the configuration of the center frame 21 of the gantry 2 needs to be changed in order to secure the overall dimension b of the gantry 2.
As shown in fig. 6(a), when the middle frame 21 has a sufficiently large structural strength without requiring an excessive design, the middle frame 21 can be designed in a compact size. In fig. 6(a), the inner frame 21 is formed such that the outer diameter dimension S4 is smaller than the inner diameter dimension S3 of the wind scooper 51. In this way, the entire center frame 21 is disposed on the inner circumferential side of the air guiding cover 51 so as to avoid the plurality of fan blade portions 45 and the air guiding cover 51. In comparison with the first embodiment, even when the dimension a in the depth direction of the rotating portion 4 increases, the overall dimension b of the mount 2 does not change because the inner frame 21 can be accommodated in the inner circumferential side of the wind scooper 51 while being closer to the rotating portion 4 in the depth direction. At this time, the wind scooper 51 is fixed to the outer peripheral side of the center frame 21 by a fixing method (welding or the like) as in the first embodiment.
As shown in fig. 6(b), when the center frame 21 cannot be reduced in size in order to maintain sufficient structural strength, an opening design such as an avoiding groove may be provided in the center frame 21 in order to avoid the vane portion 45. In fig. 6(b), the inner diameter dimension S3 of the wind scooper 51 is smaller than the outer diameter dimension S4 of the center frame 21, and the center frame 21 is formed with an escape groove 55 extending circumferentially around the center frame 21 in the depth direction, the escape groove 55 accommodating the plurality of vane portions 45, and the escape groove 55 is formed so as to be recessed toward the rear side. The air guiding cover 51 (or referred to as an air guiding plate) is provided on an end surface of the escape groove 55 facing the rotating portion 4 side, and in the present embodiment, the air guiding cover 51 is two annular air guiding plates provided on an outer peripheral side of the plurality of fan blade portions 45 away from the rotation center P of the rotating portion 4 and an inner peripheral side of the plurality of fan blade portions close to the rotation center P of the rotating portion 4. One end of each annular air deflector facing the middle frame 21 in the depth direction is fixed on the middle frame 21, and the other end facing the rotating part 4 in the depth direction is closely attached to the end face of the rotating part 4 facing the middle frame 21. The air guide portion 5 is constituted by an escape groove 55 formed in the center frame 21, an annular air guide cover 51 (or referred to as an air guide plate) fixed to the center frame 21, and an annular closed space formed by the rotating portion 4. An air outlet 53 for guiding the hot air in a predetermined direction L is formed at an upper side of the air guiding cover 51 (or referred to as an air guiding plate) in the longitudinal direction. Compared to the first embodiment, even when the dimension a in the depth direction of the rotating portion 4 increases, the center 21 can be closer to the rotating portion 4 in the depth direction because the avoiding groove 55 is provided, and the overall dimension b of the gantry 2 does not change. At this time, the wind scooper 51 is fixed to the end surface of the center frame 21 facing the rotating portion 4 in the depth direction by a fixing method (welding or the like) as in the first embodiment.
In the present embodiment, the configuration of the middle frame 21 is changed so that the overall dimension b of the gantry 2 from the front side of the rotating unit 4 to the rear side of the middle frame 21 is maintained at the same size as that in the first embodiment, and when the overall dimension b of the gantry 2 of the X-ray CT apparatus 1 is not changed, the dimension a in the depth direction of the rotating unit 4 is increased so as to mount a larger rotating unit, and the effect of enabling low-noise heat radiation by the kinetic energy of the rotating unit 4 is similarly achieved.
(third embodiment)
Next, an internal configuration of an X-ray CT apparatus 1 according to a third embodiment of the present invention will be described with reference to fig. 7.
The same portions as those of the first embodiment will not be described in detail in this embodiment. Only different parts will be described. The other parts not described are the same as or equivalent to those of the first embodiment.
Fig. 7 is a schematic diagram of an internal configuration of an X-ray CT apparatus 1 according to a third embodiment of the present invention. Fig. 7 is a view from the lateral direction. In order to more clearly show the structure of the X-ray CT apparatus 1, only a partial structure of the gantry is shown in fig. 7, and a simplified representation of the structure of a partial part is shown.
In the present embodiment, unlike the first embodiment, it is not necessary to provide an independent air guide cover 51 for guiding out the hot air.
As shown in fig. 7, two annular seal plates 59 are provided on the outer peripheral side of the plurality of vane portions 45 away from the rotation center P of the rotating portion 4 and the inner peripheral side of the plurality of vane portions 45 close to the rotation center P of the rotating portion 4, respectively, and end surfaces of the two seal plates 59 on the side facing the center frame 21 in the depth direction are fixed to end surfaces of the center frame 21 facing the vane portions 45 in the depth direction. The end surfaces of the two seal plates 59 on the side facing the rotary section 4 in the depth direction are in close contact with the end surfaces of the rotary section 4 on the side facing the center frame 21 in the depth direction, whereby an annular closed space accommodating the plurality of vane portions 45 is formed between the ventilation opening 44 of the rotary section 4 and the center frame 21. The air guide portion 5 is formed of an annular closed space formed by the center frame 21, an annular seal plate 59 fixed to the center frame 21, and the rotating portion 4. An exhaust port 58 for guiding out the hot air in a predetermined direction L is formed on the upper side of the outer peripheral sealing plate 59 in the longitudinal direction.
In the present embodiment, when the rotary unit 4 is operated, the vane portions 45 rotate with the rotation of the rotary unit 4, and each vane portion 45 pushes air to generate a vortex air flow and causes the air to flow to the air guide unit 5. As the air at the vent 44 flows along the air guide portion 5, a negative pressure is formed at the vent 44, the cold air at the circumferential outer side of the rotating portion 4 flows in from the air inlet 43, takes away heat generated by various components in the rotating portion 4, the cold air is changed into hot air and is discharged to the air guide portion 5 through the vent 44, the hot air is collected and guided by the air guide portion 5, and as the rotating portion 4 rotates continuously, the hot air is continuously discharged to the air guide portion 5, so that the air pressure of the air guide portion 5 is increased, and the hot air is discharged from the air outlet 58 of the air guide portion 5 in the prescribed direction L. That is, the air is circulated by the kinetic energy of the rotating portion 4 during rotation, and the heat of the rotating portion member, such as the X-ray generating device 11, provided on the base portion 42 of the rotating portion 4 is taken away and discharged to the outside, thereby achieving the function of dissipating the heat of the rotating portion member.
The number of the seal plates 59 is not particularly limited as long as an annular closed space can be formed between the center frame 21, the seal plates 59, and the rotating portion 4. The sealing plate can be two annular sealing plates or two annular structures formed by splicing a plurality of sheet-shaped sealing plates.
According to the above embodiment, the air guide portion 5 located on the exhaust side of the rotating portion 4 can guide the hot air and guide the hot air in the predetermined direction L.
The heat radiation structure of the X-ray CT apparatus described in at least one of the above embodiments is configured to include the annular rotating portion in which the ventilation portion for flowing air is formed, and the air guide portion which is located on the air discharge side of the ventilation portion and guides air in a predetermined direction. Effective use of the kinetic energy of the rotating part can be achieved. In addition, since the design of the fan is eliminated, the noise caused by the part can be directly eliminated, and since the design of the fan is eliminated, the parts of the X-ray CT device which need to be maintained are reduced, and the efficiency of routine inspection is increased.
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 ways, and various omissions, substitutions, combinations, and changes can be made without departing from the spirit of the invention. These embodiments and modifications are included in the scope and gist of the present invention, and are included in the present invention and the equivalent scope thereof described in the claims.
Claims (9)
1. An X-ray CT apparatus, comprising:
an annular rotating part on which a ventilation part for making air flow is formed;
an X-ray generating device that is provided on the rotating portion and emits X-rays to a subject;
an X-ray detection device which is provided on the rotating unit so as to face the X-ray generation device and detects X-rays that have passed through the subject;
a stand provided on the ground, the stand further having a middle frame rotatably supporting the rotating part; and
and a wind guide portion that is located on a discharge side of the ventilation portion of the rotating portion, and that guides the air in a predetermined direction.
2. The X-ray CT apparatus according to claim 1,
the air guide part is an annular closed space formed by an air guide cover and the rotating part, the air guide cover is formed into an annular shape and provided with a containing part, the containing part faces the rotating part, an air outlet which leads air out in a specified direction is formed in the upper side of the air guide cover, the end face of the air guide cover facing the rotating part is parallel to a plane which is orthogonal to the rotating center of the rotating part, the end face of the air guide cover facing the middle frame is inclined in the depth direction relative to the end face facing the rotating part, and the air guide cover is formed into an inclined shape, the size of the upper side in the depth direction is larger than the size of the lower side in the depth direction when viewed from the transverse direction.
3. The X-ray CT apparatus according to claim 1,
the air guide part is an annular closed space formed by an avoidance groove formed on the middle frame, an annular air guide plate fixed on the middle frame and the rotating part, and an air outlet for leading air out in a specified direction is formed on the upper side of the air guide plate.
4. The X-ray CT apparatus according to claim 1,
the air guide part is an annular closed space formed by the middle frame, an annular sealing plate fixed on the middle frame and the rotating part, and an air outlet for leading out air in a specified direction is formed on the upper side of the sealing plate.
5. The X-ray CT apparatus according to claim 2,
the air guide cover is provided with a protection pad which is positioned at the air outlet and used for preventing foreign matters or water vapor from falling into the air guide cover.
6. The X-ray CT apparatus according to any one of claims 1 to 4, wherein the ventilation portion has:
a plurality of ventilation openings formed on a side of the rotation portion facing the middle frame;
a plurality of air inlets formed along an outer peripheral side of the rotating portion; and
and a plurality of fan blade portions provided at the air vent and inclined so as to flow toward the air guide portion when the rotating portion rotates.
7. The X-ray CT apparatus according to claim 6,
the plurality of vents are formed in different sizes.
8. The X-ray CT apparatus according to claim 2,
the inner diameter of the wind scooper is larger than the outer diameter of the middle frame, and the wind scooper is fixed on the outer peripheral side of the middle frame.
9. The X-ray CT apparatus according to any one of claims 2 to 4,
the air outlet is formed by a plurality of round holes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/019861 WO2021241595A1 (en) | 2020-05-26 | 2021-05-25 | X-ray ct apparatus, control method of x-ray ct apparatus, and program |
| JP2021569995A JPWO2021241595A1 (en) | 2020-05-26 | 2021-05-25 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020219526556 | 2020-09-09 | ||
| CN202021952655 | 2020-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114224370A true CN114224370A (en) | 2022-03-25 |
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ID=80742950
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011573038.XA Pending CN114224370A (en) | 2020-05-26 | 2020-12-24 | X-ray CT apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114224370A (en) |
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2020
- 2020-12-24 CN CN202011573038.XA patent/CN114224370A/en active Pending
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