CN109125953A - Feedback device and multi-leaf optical grating system - Google Patents
Feedback device and multi-leaf optical grating system Download PDFInfo
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- CN109125953A CN109125953A CN201810794692.XA CN201810794692A CN109125953A CN 109125953 A CN109125953 A CN 109125953A CN 201810794692 A CN201810794692 A CN 201810794692A CN 109125953 A CN109125953 A CN 109125953A
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- feedback device
- blade
- supporting element
- optical grating
- leaf optical
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- 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
- A61N5/1042—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head
- A61N5/1045—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head using a multi-leaf collimator, e.g. for intensity modulated radiation therapy or IMRT
-
- 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
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
- A61N5/1065—Beam adjustment
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- 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
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
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- 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)
- Telescopes (AREA)
Abstract
This application involves field of medical technology more particularly to a kind of feedback device and multi-leaf optical grating systems.The feedback device includes supporting element, draught line, erection support and feedback device.For being fixedly connected with the blade, the other end is fixed and is wound in the supporting element for one end of the draught line；The erection support and the supporting element are rotatablely connected；The feedback device is used to obtain the angular displacement parameter of the supporting element, and feeds back to the receiving end of the multi-leaf optical grating system.Feedback device provided herein can be with very little due to the area of the cross section of draught line one end, therefore it may be implemented that thinner blade is monitored and is fed back, therefore the precision of the monitoring to thinner blade can be improved, the conformal degree of multi-leaf optical grating can also be improved, and the device of smaller size smaller can be set into the supporting element and erection support, may be implemented to install in limited installation space.
Description
Technical field
This application involves field of medical technology more particularly to a kind of feedback device and multi-leaf optical grating systems.
Background technique
Currently, the Medical Devices being commonly used in oncotherapy are radiotherapy apparatus, the ray issued using radiotherapy apparatus
Kill tumour cell.Radiotherapy apparatus generally includes the multi-leaf optical grating system that the radioactive ray for issuing to radioactive source carry out conformal adjustment
System.Multi-leaf optical grating system generally includes multipair blade, the driving motor of driving blade movement and monitoring blade and moves and be arranged
Feedback device in driving motor end, commonly referred to as a feedback device.
It is the corresponding relationship between the circle number and the displacement of blade according to driving motor rotation due to a feedback device, leads to
The circle number of measurement motor rotation is crossed to monitor the displacement of blade movement, in this case, there is no its that can be used for comparing
Its monitoring data, therefore limitation will receive to the accuracy of the monitoring of the displacement of blade movement.In order to improve to blade movement
The monitoring precision of displacement installs secondary feedback device in blade end, in general, blade is thinner, leafy light in the prior art
The conformal degree of grid is higher, however existing secondary feedback device is due to its structure, monitoring mode and the space that can be used for installing
Limitation, projection width can only be generally monitored greater than the blade of 5mm, can not achieve and thinner blade is supervised
It surveys.
Summary of the invention
This application provides a kind of feedback device and multi-leaf optical grating systems, cannot be right to solve existing secondary feedback device
The problem of thinner blade is monitored.
The first aspect of the application provides a kind of feedback device, for monitoring the position that blade moves in multi-leaf optical grating system
It moves, comprising:
Erection support；
Supporting element is rotatably coupled with the erection support；
Draught line, one end of the draught line are connected to the blade, and the other end is connected to and is wound in the supporting element；
Elastic component is set between the erection support and the supporting element, to drive the supporting element to reset；
Feedback device, the feedback device are used to obtain the angular displacement parameter of the supporting element, and feed back to described leafy
The receiving end of optical-mechanical system.
Further, the supporting element includes ontology and line wheel, and the line wheel is arranged and is fixedly connected on the ontology, institute
The other end for stating draught line is fixed and is wound in the line wheel.
Further, the supporting element has sunk structure, and the sunk structure is continuous along the draught line winding direction
Around setting.
Further, the elastic component is wind spring.
Further, the erection support includes bearing.
Further, the feedback device further includes steering column, and the steering column is set to the mobile road of the draught line
On diameter, steering column described in the draught line pile warp.
Further, the feedback device is set as encoder, and the encoder obtains the angular displacement ginseng of the supporting element
Number, and be electric signal by the angular displacement Parameter Switch, to feed back to the receiving end of the multi-leaf optical grating system.
The second aspect of the application provides a kind of multi-leaf optical grating system, the multi-leaf optical grating system include multiple blades,
Driving device and a feedback device and it is aforementioned in also described in any item feedback devices.
Further, the multi-leaf optical grating system further includes additional feedback device, and the additional feedback device is located at described
The upside of blade, the additional feedback device includes chip, and the magnetic stripe of the chip and the blade couples, to obtain the magnetic
Displacement of the lines parameter in item.
Further, the feedback device obtains the displacement of the lines parameter of blade of the thickness less than or equal to 2.5mm；It is described
Additional feedback device obtains the displacement of the lines parameter of blade of the thickness greater than 2.5mm.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
A kind of feedback device provided herein, for monitoring the displacement that blade moves in multi-leaf optical grating system, the traction
One end of line is connect with aforementioned blade, and the other end is fixedly connected on supporting element, and supporting element and erection support are rotatablely connected, driving dress
Setting driving blade movement makes blade generate displacement of the lines, and draught line movement is pulled before and after blade, and draught line drives supporting element to occur to turn
Dynamic, feedback device obtains the angular displacement parameter of supporting element, and to get the displacement of blade movement, then, elastic component drives support
Part resets, and by the angular displacement parameter feedback to the receiving end of multi-leaf optical grating system, receiving end can will receive the feedback device
The angular displacement parameter be compared with parameter preset, to improve the accuracy of displacement monitoring moved to blade.With existing skill
Art is compared, and feedback device provided herein can be may be implemented due to the area of the cross section of draught line one end with very little
Thinner blade is monitored and is fed back, therefore the precision of the monitoring to thinner blade can be improved, can also be improved more
The conformal degree of leaf grating, and the device of smaller size smaller can be set into the supporting element and erection support, may be implemented limited
Installation space in installation.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Application.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multi-leaf optical grating system provided by the embodiment of the present application；
Fig. 2 is the partial structure diagram of multi-leaf optical grating system provided by the embodiment of the present application；
Fig. 3 is the partial structure diagram of feedback device provided by the embodiment of the present application；
Fig. 4 is the sectional view of the part-structure of feedback device provided by the embodiment of the present application.
Appended drawing reference:
1- multi-leaf optical grating system；
10- blade；
11- magnetic stripe；
20- blade guide rail case；
30- feedback device；
31- draught line；
32- supporting element；
321- line wheel；
322- sunk structure；
33- erection support；
34- wind spring；
35- steering column；
36- feedback device；
37- fixing end；
40- driving motor；
Feedback device of 50-；
60- additional feedback device；
70- support platform；
80- drive lead screw；
90- transmission nut.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Specific embodiment
The application is described in further detail below by specific embodiment and in conjunction with attached drawing.
As shown in Figs 1-4, the embodiment of the present application provides a kind of multi-leaf optical grating system 1, puts for what is issued to radioactive source
Ray carries out conformal adjustment, which includes being used to form and the matched radiation launched field of region shape to be treated
Multiple blades 10, the blade guide rail case 20 for placing blade 10, the driving device moved for driving blade 10.Multiple blades
10 can have the stacking in gap to arrange with through-thickness, and blade 10 can be moved forward and backward, in order to control the back-and-forth motion of blade 10,
Blade guide groove is also provided in the blade guide rail case 20；The driving device may include driving motor 40, drive lead screw 80
With transmission nut 90, which can connect with drive lead screw 80, which can be 90 turn with transmission nut
Dynamic connection, the transmission nut 90 can be fixedly connected with blade 10, specifically, the driving motor 40 rotation can drive driving wire
Bar 80 rotates, and the rotation of drive lead screw 80 can drive transmission nut 90 mobile, so that the angular displacement that drive lead screw 80 is rotated turns
It is changed to the mobile displacement of the lines of transmission nut 90,90 movement of transmission nut can be mobile with movable vane piece 10, to realize driving device
Driving blade 10 moves, and being fixedly connected for being previously mentioned in the embodiment of the present application can be welding, riveting, clamping, splicing etc.,
This does not limit the mode being fixedly connected.
In order to obtain the mobile displacement of the lines parameter of blade 10, the embodiment of the present application provides a kind of feedback device 30, this is anti-
Presenting device 30 includes draught line 31, supporting element 32, erection support 33 and feedback device 36 and elastic component.The one of the draught line 31
End can be connect with blade 10, and the other end may be coupled to and be wound in supporting element 32；The supporting element 32 can be a kind of support
Column, draught line 31 can wind on the support column；The erection support 33 can be rotatablely connected with the supporting element 32, and to the branch
Support member 32 plays the role of support, and the fixing end 37 of the erection support 33 can be solid with the support platform 70 of multi-leaf optical grating system 1
Fixed connection, the erection support 33 can be equipped with through-hole, and supporting element 32 can pass through the through-hole and rotationally connected；The ultramagnifier
Part 36 is used to obtain the angular displacement parameter of the supporting element 32, and feeds back to the receiving end of multi-leaf optical grating system 1, the feedback device 36
It specifically can be a kind of displacement sensor, it is preferred that the feedback device 36 can be a kind of encoder, which can be direct
The angular displacement parameter of the supporting element 32 is obtained, which specifically can be turnning circle, and use according to the supporting element 32
Perimeter in the position of winding draught line 31, to calculate the length that draught line 31 is pulled by blade 10, while also just knowing
The mobile displacement of the lines parameter of blade 10, what which can be mobile by the turnning circle of supporting element 32 or directly by blade 10
Displacement of the lines Parameter Switch is electric signal, and is transferred to the receiving end of multi-leaf optical grating system 1, the encoder and other displacement sensors
It compares, it can be more reliable in this way, faster, more convenient, more efficient directly by digital information transmission to receiving end.
Specifically, driving device driving blade 10 above-mentioned movement makes blade 10 generate displacement of the lines, blade 10 forward or to
After move and pull draught line 31 move, draught line 31 so drive supporting element 32 rotate, feedback device 36 obtain support
The angular displacement parameter of part 32, to get the displacement of the lines parameter of the movement of blade 10, the feedback device is by the angular displacement parameter feedback
To the receiving end of multi-leaf optical grating system 1.In order to make post exercise blade 10 playback as early as possible, not influence to prepare to move next time,
The elastic component that both ends are connected with erection support 33 and supporting element 32 respectively can use the effect automatic traction of own resilience
Supporting element 32 resets.
Feedback device 30 provided by the embodiment of the present application due to the cross section of 31 one end of draught line area can with very little,
Therefore may be implemented that thinner blade 10 is monitored and is fed back, therefore the monitoring to thinner blade 10 can be improved
Precision, and then the conformal degree of multi-leaf optical grating can also be improved, and the supporting element 32 and erection support 33 can be set into
The device of smaller size smaller may be implemented to install in limited installation space in multi-leaf optical grating system 1.
As shown in Fig. 2, multi-leaf optical grating system 1 provided by the embodiment of the present application can also include a feedback device 50,
Feedback device 50 can be set in aforementioned driving motor end, to obtain the angular displacement parameter of the rotation of driving motor 40, into
And the predetermined displacement of the lines parameter generated of blade 10 is obtained, parameter preset, the receiving end of multi-leaf optical grating system 1 can be defined as
The angular displacement parameter from feedback device 30 that can will be received, is compared with parameter preset above-mentioned, and then judges
Whether the displacement of the lines that blade 10 actually generates and the predetermined displacement of the lines generated of blade 10 are identical, if it's different, the two difference
How much, to improve the accuracy for the displacement that the monitoring movement of blade 10 generates, that is to say, that feedback device 30 provided herein
It can be a kind of secondary feedback device.
On the basis of the above embodiments, multi-leaf optical grating system 1 provided by the embodiment of the present application can also include another
The secondary feedback device of kind can be referred to as additional feedback device 60, as shown in Figure 1, the additional feedback for convenience of distinguishing and illustrating
Device 60 can be set in the upside of multiple 10 length directions of blade, which includes chip, which can be with
It is coupled with the magnetic stripe 11 of aforementioned blade 10, and obtains the displacement of the lines parameter of aforementioned blade 10, to feed back to multi-leaf optical grating system 1
Receiving end.But due to the limitation of the chip structure in the additional feedback device 60, the blade 10 of thinner thickness can not be read
Displacement of the lines parameter, specifically, the additional feedback device 60 can not just be read when the thickness of blade 10 is less than or equal to 2.5mm
Its displacement of the lines parameter, therefore, when the thickness of blade 10 is less than or equal to 2.5mm, it is necessary to which feedback device 30 obtains its line
Displacement parameter.
Feedback device 30 above-mentioned can cooperate with additional feedback device 60, to improve efficiency, utilization rate and precisely
Degree.A kind of optional embodiment is that feedback device 30 obtains the displacement of the lines parameter of the blade 10 of thinner thickness, as thickness is less than
Or the displacement of the lines parameter of the blade 10 equal to 2.5mm, the displacement of the lines parameter of the thicker blade 10 of thickness is by additional feedback device 60
It obtains, the displacement of the lines parameter of the blade 10 such as thickness greater than 2.5mm is obtained by additional feedback device 60, can be improved in this way
The efficiency of acquisition, in addition, occupied space can also be further decreased in this way since additional feedback device 60 is the structure of sheet；
An alternative embodiment is that feedback device 30 obtains the displacement of the lines parameter of all blades 10, and additional feedback device 60 is again
Obtain the displacement of the lines parameter of a thicker blade of thickness 10, in this way can by three kinds of different devices to partial blade 10 into
The monitoring of row three times, can further improve the precision of monitoring.
A kind of preferred embodiment is, as shown in figure 3, the supporting element 32 of aforementioned feedback device 30 may include ontology and line
Wheel 321, which can be arranged and be fixedly connected on aforementioned ontology, and one end of draught line 31 is fixedly connected with blade 10, separately
The line wheel 321 can be fixed and be wound in one end, according to the demand of different radiotherapies, can use the line of different-diameter size
Wheel 321, in general, the diameter of line wheel 321 is bigger, then unwrapping wire or the length of take-up are longer in the unit time, in the unit time
The mobile distance of blade 10 is bigger, that is to say, that the movement velocity of blade 10 is faster, on the one hand can accelerate to monitor in this way
Speed on the other hand can accelerate the movement velocity of projection of the blade 10 on equal central planes, and then accelerate to obtain with to
The matched radiation launched field for the treatment of region shape.
Another preferred embodiment is, as shown in figure 4, the supporting element 32 can have sunk structure 322, the recess knot
Structure 322 is arranged along 31 winding direction continued circling of draught line, and the draught line 31 is fixed to be simultaneously wound in the sunk structure 322, can be with
The position that draught line 31 is wound is limited, to improve draught line around one week length and supporting element 32 for winding the portion of draught line 31
The consistency of the perimeter of position improves the accuracy of calculating, and then improves the accuracy of monitoring 10 moving displacement of blade.
Further, which is specifically as follows wind spring 34, and wind spring 34 can be fixedly connected with one end with erection support 33,
The other end winds and is fixed on supporting element 32, drives supporting element 32 to automatically reset to realize, in addition, wind spring 34 can be narrow
Space in biggish restoring force is persistently provided, this meets the actual needs of 1 confined space of multi-leaf optical grating system.
As shown in figure 4, erection support 33 above-mentioned is specifically as follows bearing, one end of supporting element 32 can in bearing
Circle fixation is rotatably coupled, and the outer wall of bearing can be fixedly connected with support platform 70, and bearing can reduce by 32 turns of supporting element
Coefficient of friction during dynamic reduces friction, and can also guarantee the rotating accuracy of supporting element 32, and bearing, which can be one kind, to be had
Certain thickness cirque structure, so as to reduce occupied space.
As shown in Figure 1, thus having many feedback devices due to the corresponding blade 10 of a feedback device 30
30, a plurality of draught line 31 is also just had, is influenced each other between a plurality of draught line 31 in order to prevent, and prevents draught line 31 from interfering
The work of other devices, the feedback device 30 can also include steering column 35, which can be set in the shifting of draught line 31
On dynamic path, draught line 31 and 35 sliding contact of steering column, in addition, the steering column 35 can make draught line be stretched even tauter, with
More accurately get the displacement of the lines parameter of blade 10.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of feedback device, for monitoring the displacement that blade moves in multi-leaf optical grating system characterized by comprising
Erection support；
Supporting element is rotatably coupled with the erection support；
Draught line, one end of the draught line are connected to the blade, and the other end is connected to and is wound in the supporting element；
Elastic component is set between the erection support and the supporting element, to drive the supporting element to reset；
Feedback device, the feedback device are used to obtain the angular displacement parameter of the supporting element, and feed back to the multi-leaf optical grating
The receiving end of system.
2. feedback device according to claim 1, which is characterized in that the supporting element includes ontology and line wheel, the line
Wheel is arranged and is fixedly connected on the ontology, and the other end of the draught line is fixed and is wound in the line wheel.
3. feedback device according to claim 1, which is characterized in that
The supporting element has sunk structure, and the sunk structure is arranged along the draught line winding direction continued circling.
4. feedback device according to claim 1, which is characterized in that the elastic component is wind spring.
5. feedback device according to claim 1, which is characterized in that the erection support includes bearing.
6. feedback device according to claim 1, which is characterized in that further include steering column, the steering column is set to institute
It states in the movement routine of draught line, steering column described in the draught line pile warp.
7. feedback device according to claim 1, which is characterized in that
The feedback device includes encoder, and the encoder obtains the angular displacement parameter of the supporting element, and by the angle position
Shifting parameter is converted to electric signal, to feed back to the receiving end of the multi-leaf optical grating system.
8. a kind of multi-leaf optical grating system, the multi-leaf optical grating system includes multiple blades, driving device and a feedback device,
It is characterized in that, further includes feedback device of any of claims 1-7.
9. multi-leaf optical grating system according to claim 8, which is characterized in that further include additional feedback device, the auxiliary
Feedback device is located at the upside of the blade, and the additional feedback device includes chip, the magnetic stripe of the chip and the blade
Coupling, to obtain the displacement of the lines parameter in the magnetic stripe.
10. multi-leaf optical grating system according to claim 9, which is characterized in that
The feedback device obtains the displacement of the lines parameter of blade of the thickness less than or equal to 2.5mm；
The additional feedback device obtains the displacement of the lines parameter of blade of the thickness greater than 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794692.XA CN109125953A (en) | 2018-07-18 | 2018-07-18 | Feedback device and multi-leaf optical grating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794692.XA CN109125953A (en) | 2018-07-18 | 2018-07-18 | Feedback device and multi-leaf optical grating system |
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| Publication Number | Publication Date |
|---|---|
| CN109125953A true CN109125953A (en) | 2019-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810794692.XA Pending CN109125953A (en) | 2018-07-18 | 2018-07-18 | Feedback device and multi-leaf optical grating system |
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| CN (1) | CN109125953A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022140992A1 (en) * | 2020-12-28 | 2022-07-07 | 北京大医通汇创新科技有限公司 | Leaf position detection device, multi-leaf collimator, and radiotherapy equipment |
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| US4480920A (en) * | 1980-09-24 | 1984-11-06 | The Massachusetts General Hospital Corporation | Fringe pattern method and apparatus for producing X-ray dosage compensating filters |
| CN104667427A (en) * | 2013-11-29 | 2015-06-03 | 上海联影医疗科技有限公司 | Leaf position monitoring device for multi-leaf collimator, multi-leaf collimator and radiology treatment equipment |
| CN105233426A (en) * | 2015-10-12 | 2016-01-13 | 上海联影医疗科技有限公司 | Multi-leaf collimator and blade driving method |
| CN106344061A (en) * | 2016-08-08 | 2017-01-25 | 沈阳东软医疗系统有限公司 | Multi-leaf collimator leaf motion position control device and method and linear accelerator |
| CN206566363U (en) * | 2016-08-11 | 2017-10-20 | 深圳市奥沃医学新技术发展有限公司 | A kind of multi-diaphragm collimator |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480920A (en) * | 1980-09-24 | 1984-11-06 | The Massachusetts General Hospital Corporation | Fringe pattern method and apparatus for producing X-ray dosage compensating filters |
| CN104667427A (en) * | 2013-11-29 | 2015-06-03 | 上海联影医疗科技有限公司 | Leaf position monitoring device for multi-leaf collimator, multi-leaf collimator and radiology treatment equipment |
| CN105233426A (en) * | 2015-10-12 | 2016-01-13 | 上海联影医疗科技有限公司 | Multi-leaf collimator and blade driving method |
| CN106344061A (en) * | 2016-08-08 | 2017-01-25 | 沈阳东软医疗系统有限公司 | Multi-leaf collimator leaf motion position control device and method and linear accelerator |
| CN206566363U (en) * | 2016-08-11 | 2017-10-20 | 深圳市奥沃医学新技术发展有限公司 | A kind of multi-diaphragm collimator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022140992A1 (en) * | 2020-12-28 | 2022-07-07 | 北京大医通汇创新科技有限公司 | Leaf position detection device, multi-leaf collimator, and radiotherapy equipment |
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Address after: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Applicant after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Applicant before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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Application publication date: 20190104 |