CN109350867A - A kind of structure for rotary frame inner rotation backboard - Google Patents
A kind of structure for rotary frame inner rotation backboard Download PDFInfo
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- CN109350867A CN109350867A CN201811480408.8A CN201811480408A CN109350867A CN 109350867 A CN109350867 A CN 109350867A CN 201811480408 A CN201811480408 A CN 201811480408A CN 109350867 A CN109350867 A CN 109350867A
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- backboard
- rotary frame
- gear
- clamping rings
- inner rotation
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- 238000005096 rolling process Methods 0.000 claims abstract description 45
- 230000005855 radiation Effects 0.000 claims description 20
- 230000002349 favourable effect Effects 0.000 claims 1
- 230000001225 therapeutic effect Effects 0.000 abstract description 10
- 230000003068 static effect Effects 0.000 abstract description 8
- 230000036651 mood Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 206010028980 Neoplasm Diseases 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000005457 optimization Methods 0.000 description 7
- 201000011510 cancer Diseases 0.000 description 6
- 238000002560 therapeutic procedure Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 201000009030 Carcinoma Diseases 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001855 preneoplastic effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
- A61N2005/1087—Ions; Protons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
- A61N2005/1097—Means for immobilizing the patient
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention discloses a kind of structures for rotary frame inner rotation backboard, including rotary frame, backboard, clamping rings, idler wheel, rolling guide, horizontal floor, square rack, reverse drive gear set and radial support horizontal stripe, the rotary frame is hollow cylindrical structure, and one end is provided with backboard inside the rotary frame, the backboard is circular configuration, and reverse drive gear set is provided at the backboard center, the beneficial effects of the present invention are: rotation backboard keeps relative static conditions with ground always, reduce psychological pressure of the patient when being treated by rotary frame, improve the comfort of patient's happy property and body of mood when treated, rotary frame is improved to Case treatment effect.The present invention does not need to be additionally provided power, and the present invention more can guarantee rotation precision using gear drive, improve rotary frame to the treatment precision and therapeutic quality of patient.Each component connection of the present invention flexibly, is suitble to promote the use of.
Description
Technical field
The present invention relates to a kind of structure, specially a kind of structure for rotary frame inner rotation backboard belongs to particle
The medical instrument structure applied technical field for the treatment of.
Background technique
The photon such as X-ray or gamma ray of traditional treatment of cancer high-energy destroys cancer cell, this to control
The disadvantage for the treatment of method maximum also receives the irradiation of ray around the healthy cell of carcinoma cells, kills cancer cell
Secondary injury can be caused to human body simultaneously.Treatment method traditional simultaneously needs very big dosage to kill the cancer of very deep position
Cell, because photon energy is successively decreased quickly in human body.
Proton therapeutic is to use traditional treatment particularly with those in recent years in the technology of field of cancer treatment high speed development
Its advantage is more obvious in the very risky cancer treatment procedure of method.Proton, neutron and electronics are former molecular main
Element, proton have the quality an of unit and the positive charge of a unit, and proton has a half-life period for being greater than 1032, and proton will
Decay into a neutron, a positive electron and a neutrino.
When with proton therapeutic, what proton curve was presented is become faster rapidly after now slowly rising, until Bragg peak, one
Cross peak value just dramatic decrease and go to zero, the intrinsic characteristic of this proton provides very ideal therapeutic for treatment tumour
Can, mainly have following advantage: as long as peak fractions are aligned at tumor focus, then tumor locus receives maximum dosage
Value, dose utilization greatly improve, and curative effect is best；Preneoplastic normal cell include skin usually by 1/3-1/2 most
Large dosage is few when the extent of injury being subject to is than X-ray or electronic case；The normal cell at tumour rear portion or deeply grateful organ are basic
On not raying and preserve from.It can be seen that proton therapeutic can be to become treatment tumour the shortcomings that customer service X-ray and electronic therapy
Promising approach, root is all derived from the Bragg peak character of proton.
Therefore proton therapy center all one, the device rotation therapy room being able to rotate, rotation therapy room are also known as rotary frame,
Rotary frame is the end of entire proton therapeutic, and when to Case treatment, patient is by lying in inside rotary frame horizontally
It on plate, is directly contacted with patient, patient is treated, existing rotary frame is in work in use, inside rotary frame
Backboard follows rotary frame to synchronize and is rotated, and patient is in by rotary frame because backboard rotation brings very big psychology pressure
Power is easy to bring tension and sense of discomfort to patient, has seriously affected rotation therapy room to the therapeutic effect of patient.
Summary of the invention
The object of the invention is that in order to solve existing rotary frame in work in use, back inside rotary frame
Plate follows rotary frame to synchronize and is rotated, and patient brings very big psychological pressure because backboard rotates in by rotary frame,
It is easy the problem of tension and sense of discomfort are brought to patient, seriously affected therapeutic effect of the rotation therapy room to patient, and is mentioned
A kind of structure for rotary frame inner rotation backboard out.
The purpose of the present invention can be achieved through the following technical solutions: a kind of knot for rotary frame inner rotation backboard
Structure, including rotary frame, backboard, clamping rings, idler wheel, rolling guide, horizontal floor, square rack, reverse drive gear
Group and radial support horizontal stripe, the rotary frame are hollow cylindrical structure, and one end is provided with inside the rotary frame
Backboard, the backboard is circular configuration, and reverse drive gear set is provided at the backboard center, the reverse drive gear
Group includes gear wheel, inside engaged gear, external gear pump and pinion gear, and the backboard side wall is provided with radiation support frame, described
Clamping rings is provided in the middle part of radiation support frame, and the clamping rings both ends are symmetrically provided through two radial supports cross
Item is connected and fixed backboard by multiple radial support horizontal stripes.
Be furthermore that: the gear wheel, inside engaged gear, external gear pump and pinion gear are straight spur gear,
The gear wheel is mounted in the radiation support plate of the rotary frame, when rotary frame rotation, drives reverse drive gear
Group counter motion, is designed by gear reduction ratio, guarantees that backboard and rotary frame have identical angular speed, to guarantee rotating
Rack rotary course dorsulum keeps relative static conditions with ground always.
Be furthermore that: the gear wheel is connect with inside engaged gear internal messing, and inside engaged gear and pinion gear are coaxial
Connection, external gear pump are connected with pinion gear external toothing, and external gear pump is mounted on backboard by axis, are realized from rotary frame
To the reversed same angular speed rotation of rotation backboard.
Be furthermore that: the backboard is mounted on several radial support horizontal stripes, radial support horizontal stripe and rotation
It is fixedly connected between radial support in rack by the clamping rings on the radiation support frame of backboard.
It is furthermore that: being provided with four rolling on the radiation support frame of the backboard, and opened on the clamping rings of backboard
There is rolling guide, four rolling passes through on the rolling guide for the clamping rings that a square rack connection is mounted on backboard,
Idler wheel can freely roll on rolling guide.
It is furthermore that: four idler wheels angle degree of being between any two, four rolling rolling on rolling guide
Dynamic angle is 0 ° -360 °, and backboard radiates a scroll wheel on support frame can 360 ° of rollings on large circle rolling guide.
Be furthermore that: the rotary frame lower inside is horizontally disposed horizontal floor, and the horizontally board ends
It is connect by bolt with rotary frame inner wall.
Be furthermore that: the side length of the square rack is less than the length of the diameter of clamping rings, rolling guide
For the circular configuration of indent, it is more steady firm to guarantee that idler wheel rotates in rolling guide.
A kind of application method of the structure for rotary frame inner rotation backboard, this method specifically includes the following steps:
Step 1: when rotary frame rotation, rotary frame drives the reverse drive gear set counter motion on backboard, greatly
Gear is connect with inside engaged gear internal messing, and inside engaged gear and pinion gear are coaxially connected, outside external gear pump and pinion gear
Engagement connection, external gear pump are mounted on backboard by axis, are designed by gear reduction ratio, guarantee that backboard and rotary frame have
Identical angular speed, to guarantee to keep relative static conditions with ground always in rotary frame rotary course dorsulum；
Step 2: being provided with rolling guide on the clamping rings of backboard, four rolling passes through a square rack connection
Be mounted on the rolling guide of the clamping rings of backboard, idler wheel can on rolling guide 360 ° freely roll, to drive back
Plate rotation is more steady, smooth, and backboard is made to guarantee to rotate with the transmission of the synchronous backward of rotary frame.
Compared with prior art, the beneficial effects of the present invention are:
1, rotation backboard keeps relative static conditions with ground always, reduces psychology of the patient when being treated by rotary frame
Pressure improves the comfort of patient's happy property and body of mood when treated, improves rotary frame and imitates to Case treatment
Fruit.
2, the present invention does not need to be additionally provided power, and the present invention more can guarantee rotation precision using gear drive, improve
Treatment precision and therapeutic quality of the rotary frame to patient.Each component connection of the present invention flexibly, is suitble to promote the use of.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is isometric side view of the invention.
Fig. 2 is the rotation backboard back side and reverse gear structural schematic diagram.
Fig. 3 is the detail enlarged diagram of a-quadrant in Fig. 2.
Fig. 4 is rotation backboard front schematic view.
Fig. 5 is reverse gear structure chart.
In figure: 1, rotary frame；2, backboard；3, clamping rings；4, idler wheel；5, rolling guide；6, horizontal floor；7, square
Shape bracket；8, gear wheel；9, inside engaged gear；10, external gear pump；11, pinion gear；12, radial support horizontal stripe.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
It please refers to shown in Fig. 1-5, a kind of structure for rotary frame inner rotation backboard, including rotary frame 1, backboard
2, clamping rings 3, idler wheel 4, rolling guide 5, horizontal floor 6, square rack 7, reverse drive gear set and radial support
Horizontal stripe 12, rotary frame 1 is hollow cylindrical structure, and 1 inside one end of rotary frame is provided with backboard 2, and backboard 2 is round knot
Structure, and reverse drive gear set is provided at 2 center of backboard, reverse drive gear set includes gear wheel 8, inside engaged gear 9, outer
Meshing gear 10 and pinion gear 11,2 side wall of backboard are provided with radiation support frame, are provided with clamping rings 3 in the middle part of radiation support frame,
And 3 both ends of clamping rings are symmetrically provided through two radial support horizontal stripes 12, it is right by multiple radial support horizontal stripes 12
Backboard 2 is connected and fixed.
As a kind of technical optimization scheme of the invention, gear wheel 8, inside engaged gear 9, external gear pump 10 and pinion gear
11 be straight spur gear, and gear wheel 8 is mounted in the radiation support plate of rotary frame 1, when rotary frame 1 rotates, band
Dynamic reverse drive gear set counter motion, is designed by gear reduction ratio, guarantees that backboard 2 and rotary frame 1 have identical angle speed
Degree, to guarantee to keep relative static conditions with ground always in 1 rotary course dorsulum 2 of rotary frame.
As a kind of technical optimization scheme of the invention, gear wheel 8 is connect with 9 internal messing of inside engaged gear, and internal messing
Gear 9 and pinion gear 11 are coaxially connected, and external gear pump 10 is connected with 11 external toothing of pinion gear, and external gear pump 10 is pacified by axis
On backboard 2, the reversed same angular speed rotation from rotary frame 1 to rotation backboard 2 is realized.
As a kind of technical optimization scheme of the invention, backboard 2 is mounted on several radial support horizontal stripes 12, radiation
Shape supports solid by the clamping rings 3 on the radiation support frame of backboard 2 between the radial support on horizontal stripe 12 and rotary frame 1
Fixed connection.
As a kind of technical optimization scheme of the invention, four rolling 4 is provided on the radiation support frame of backboard 2, and carry on the back
Rolling guide 5 is provided on the clamping rings 3 of plate 2, four rolling 4 is mounted on backboard 2 by a connection of square rack 7
On the rolling guide 5 of clamping rings 3, idler wheel 4 can freely roll on rolling guide 5.
As a kind of technical optimization scheme of the invention, angle is 90 degree to four rolling 4 between any two, four rolling 4
On rolling guide 5 can roll angle be 0 ° -360 °, backboard 2 radiate support frame on 4 scroll wheels can be rolled in large circle
360 ° of rollings on dynamic guide rail 5.
As a kind of technical optimization scheme of the invention, 1 lower inside of rotary frame is horizontally disposed horizontal floor 6, and
Horizontal 6 both ends of floor pass through bolt and connect with 1 inner wall of rotary frame, and it is firm to guarantee that horizontal floor 6 more consolidates when in use.
As a kind of technical optimization scheme of the invention, the side length of square rack 7 is less than the diameter of clamping rings 3
Length, rolling guide 5 is the circular configuration of indent, and it is more steady firm to guarantee that idler wheel 4 rotates in rolling guide 5.
A kind of application method of the structure for rotary frame inner rotation backboard, this method specifically includes the following steps:
Step 1: when rotary frame 1 rotates, rotary frame drives the reverse drive gear set counter motion on backboard,
Gear wheel 8 is connect with 9 internal messing of inside engaged gear, and inside engaged gear 9 and pinion gear 11 are coaxially connected, 10 He of external gear pump
11 external toothing of pinion gear connection, external gear pump 10 are mounted on backboard 2 by axis, are designed by gear reduction ratio, guarantee back
Plate 2 and rotary frame 1 have identical angular speed, to guarantee to keep with ground always in 1 rotary course dorsulum 2 of rotary frame
Relative static conditions；
Step 2: being provided with rolling guide 5 on the clamping rings 3 of backboard 2, four rolling 4 passes through a square rack 7
Connect be mounted on backboard 2 clamping rings 3 rolling guide 5 on, idler wheel 4 can on rolling guide 5 360 ° freely roll, from
And drive the rotation of backboard 2 more steady, smooth, make backboard 2 guarantee to rotate with the transmission of the synchronous backward of rotary frame 1.
Compared with prior art, the beneficial effects of the present invention are:
1, rotation backboard 2 keeps relative static conditions with ground always, reduces the heart of the patient when being treated by rotary frame
Pressure is managed, the comfort of patient's happy property and body of mood when treated is improved, improves rotary frame to Case treatment
Effect.
2, the present invention does not need to be additionally provided power, and the present invention more can guarantee rotation precision using gear drive, improve
Treatment precision and therapeutic quality of the rotary frame to patient.Each component connection of the present invention flexibly, is suitble to promote the use of.
In the use of the present invention, firstly, check the safety that each component of the present invention uses, when rotary frame 1 rotates, band
Dynamic reverse drive gear set counter motion, is designed by gear reduction ratio, guarantees that backboard 2 and rotary frame 1 have identical angle speed
Degree guarantees that rotation backboard 2 keeps relative static conditions with ground always, reduces psychology pressure of the patient when being treated by rotary frame
Power, improves the comfort of patient's happy property and body of mood when treated, and rotation backboard 2 is mounted on the radial branch of backboard 2
It supports on horizontal stripe 12, passes through the large circle on the radiation support frame of backboard 2 between the radiation of backboard 2 support and the radial support of rotary frame
3 are fixedly connected.Is provided with rolling guide 5 on backboard radiation support large circle 3, scroll wheel 4 can on rolling guide 360 ° of freedom
It rolls, guarantees that reverse drive gear set is more steady to the transmission of backboard 2, rotation.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment that the invention is only.Obviously, according to the content of this specification, can make
Many repairs this and variation.These embodiments are chosen and specifically described to this specification, is original in order to better explain the present invention
Reason and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only authorized
The limitation of sharp claim and its full scope and equivalent.
Claims (8)
1. a kind of structure for rotary frame inner rotation backboard, which is characterized in that including rotary frame (1), backboard (2),
Clamping rings (3), idler wheel (4), rolling guide (5), horizontal floor (6), square rack (7), reverse drive gear set and spoke
Penetrate shape support horizontal stripe (12)；
Wherein, the rotary frame (1) is hollow cylindrical structure, and the internal one end of the rotary frame (1) is provided with backboard
(2), the backboard (2) is circular configuration, and is provided with reverse drive gear set at the backboard (2) center；
The reverse drive gear set includes gear wheel (8), inside engaged gear (9), external gear pump (10) and pinion gear (11)；
Backboard (2) side wall is provided with radiation support frame, is provided with clamping rings (3) in the middle part of the radiation support frame, and institute
It states clamping rings (3) both ends and is symmetrically provided through two radial support horizontal stripes (12).
2. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that described big
Gear (8), inside engaged gear (9), external gear pump (10) and pinion gear (11) are straight spur gear, the gear wheel
(8) it is mounted in the radiation support plate of the rotary frame (1).
3. a kind of structure for rotary frame inner rotation backboard according to claim 2, which is characterized in that described big
Gear (8) is connect with inside engaged gear (9) internal messing, and inside engaged gear (9) and pinion gear (11) are coaxially connected, external toothing tooth
Wheel (10) is connected with pinion gear (11) external toothing, and external gear pump (10) is mounted on backboard (2) by axis.
4. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that the back
Plate (2) is mounted on several radial support horizontal stripes (12), the radiation on radial support horizontal stripe (12) and rotary frame (1)
It is fixedly connected between shape support by the clamping rings (3) on the radiation support frame of backboard (2).
5. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that the back
It is provided on the radiation support frame of plate (2) four rolling (4), and is provided with rolling guide (5) on the clamping rings (3) of backboard (2),
Four rolling (4) is mounted on the rolling guide (5) of the clamping rings (3) of backboard (2) by square rack (7) connection
On.
6. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that four institutes
Stating idler wheel (4), angle is 90 degree between any two, four rolling (4) on rolling guide (5) can roll angle be 0 °-
360°。
7. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that the rotation
Favourable turn frame (1) lower inside is horizontally disposed to be had horizontal floor (6), and the horizontal floor (6) both ends pass through bolt and rotation
The connection of rack (1) inner wall.
8. a kind of structure for rotary frame inner rotation backboard according to claim 1, which is characterized in that it is described just
The side length of square set (7) is less than the length of the diameter of clamping rings (3), and rolling guide (5) is the circular configuration of indent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866558.6A CN108853757A (en) | 2018-08-01 | 2018-08-01 | A kind of structure for rotary frame inner rotation backboard |
| CN2018108665586 | 2018-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109350867A true CN109350867A (en) | 2019-02-19 |
| CN109350867B CN109350867B (en) | 2024-04-26 |
Family
ID=64306953
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810866558.6A Pending CN108853757A (en) | 2018-08-01 | 2018-08-01 | A kind of structure for rotary frame inner rotation backboard |
| CN201822032502.9U Active CN209378339U (en) | 2018-08-01 | 2018-12-05 | A kind of structure for rotary frame inner rotation backboard |
| CN201811480408.8A Active CN109350867B (en) | 2018-08-01 | 2018-12-05 | Structure for rotating backboard inside rotating rack |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810866558.6A Pending CN108853757A (en) | 2018-08-01 | 2018-08-01 | A kind of structure for rotary frame inner rotation backboard |
| CN201822032502.9U Active CN209378339U (en) | 2018-08-01 | 2018-12-05 | A kind of structure for rotary frame inner rotation backboard |
Country Status (1)
| Country | Link |
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| CN (3) | CN108853757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209500A (en) * | 2021-06-08 | 2021-08-06 | 兰州科近泰基新技术有限责任公司 | Superconductive ion rotating frame |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108853757A (en) * | 2018-08-01 | 2018-11-23 | 合肥中科离子医学技术装备有限公司 | A kind of structure for rotary frame inner rotation backboard |
| CN110841206A (en) * | 2019-11-22 | 2020-02-28 | 合肥中科离子医学技术装备有限公司 | Matching structure of rotating rack and internal telescopic floor |
| CN111803805A (en) * | 2020-07-08 | 2020-10-23 | 黄尚校 | Head and neck positioning device for radiotherapy |
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|---|---|
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| CN209378339U (en) | 2019-09-13 |
| CN108853757A (en) | 2018-11-23 |
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