CN101297759B - Rotary device of medicine image-forming system - Google Patents
Rotary device of medicine image-forming system Download PDFInfo
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- CN101297759B CN101297759B CN2007100989502A CN200710098950A CN101297759B CN 101297759 B CN101297759 B CN 101297759B CN 2007100989502 A CN2007100989502 A CN 2007100989502A CN 200710098950 A CN200710098950 A CN 200710098950A CN 101297759 B CN101297759 B CN 101297759B
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- 239000003814 drug Substances 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000002059 diagnostic imaging Methods 0.000 abstract description 8
- 238000007667 floating Methods 0.000 description 25
- 238000003384 imaging method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000002591 computed tomography Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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Abstract
This invention discloses a swiveling mechanism in a medical imaging system, comprising a fixed outer ring which is arranged fixedly on a support saddle of the medical imaging system; a low speed turntable which is arranged inside the inner edge the fixed outer ring and rotates relative to the fixed outer ring; a low speed bearing drive device which drives the low speed turntable to rotate relative to the fixed outer ring; a high speed turntable which rotates relative to the low speed turntable, and the rotation direction is the same as the rotation direction of the low speed turntable; a high speed bearing drive device which drives the high speed turntable to rotate relative to the low speed turntable. The swiveling mechanism of the invention uses a secondary swing bearing which not only increases the rotation speed of the medical imaging system, but also ensures the work stability of the medical imaging system.
Description
Technical field
The present invention relates to medical image system, particularly relate to the rotary apparatus in a kind of medical image system.
Background technology
Medical image system, especially x-ray imaging system and computed tomography (CT, Computed Tomography) imaging system is the bulb (tube) by emission X line, detector, aligner, the imaging system of the complexity that many accurate electrical equipment physical equipments such as high tension generator are formed.These electrical equipment physical equipments are installed on the huge rotating disk, high speed rotating together under the drive of floating bearing.
Fig. 1 is the structural representation of existing C T frame, and wherein left side figure is a front view, and right figure is a profile.As shown in Figure 1, fixedly outer ring 111 is installed on the bearing 151 of CT frame, fixedly on the outer ring 111 bearing drive motors 121 is installed, bearing drive motors 121 drive be installed in the fixing outer ring 111 along within rotating disk 112 rotate, fixedly between the outer of the interior edge of outer ring 111 and rotating disk 112 bearing ball 131 is arranged, be used for supporting turntable 112 with respect to fixedly outer ring 111 rotations.The equipment relevant with imaging such as X ray tube, detector are installed on the rotating disk 112.Fixedly the outer of the interior edge of outer ring 111, bearing ball 131 and rotating disk 112 constitutes a floating bearing.
With the CT system is example, and in order to pursue high-precision image quality and image taking speed, high capacity bulb and high rotating speed have become the CT Developing Trend in Technology.The rotating speed of CT has reached 0.33 second/commentaries on classics at present, and this speed has been a limit velocity, and its bottleneck just is that the rotating speed of floating bearing reaches capacity.Along with rotating speed increases, pressure that the ball of bearing inside bears and frictional force can sharply increase, and the contact fatigue on ball surface is damaged to be strengthened, and this just causes the temperature of bearing, and noise and vibration are more and more higher, until the ball breakage, influence the operate as normal of system.This shows, improve the rotating speed of floating bearing, will make the CT system works under unsure state.
Need the special problem of considering when therefore, the performance of floating bearing is design CT system.How further to improve the rotating speed of floating bearing in the CT machine and performance and become the difficult problem of CT system design in making.
Summary of the invention
One object of the present invention is to propose the rotary apparatus in a kind of medical image system, for medical imaging devices provides rotary speed faster, guarantees the stability of system works simultaneously.
To achieve these goals, technical scheme of the present invention comprises:
Rotary apparatus in a kind of medical image system comprises at least: fixing outer ring is fixedly mounted on the bearing in the described medical image system; Low speed turntable is with respect to the rotation of described fixedly outer ring; The low speed bearing driving device drives described low speed turntable and rotates with respect to described fixedly outer ring; High speed rotating plate, with respect to described low speed turntable rotation, and direction of rotation is identical with the direction of rotation of described low speed turntable; High speed bearing drive device drives described high speed rotating plate and rotates with respect to described low speed turntable.
Wherein, described low speed bearing driving device comprises: the low speed bearing drive motors, be fixedly mounted on ground or the described fixedly outer ring, and drive described low speed turntable and rotate with respect to described fixedly outer ring.
Wherein, described high speed bearing drive device comprises: the high-speed bearing drive motors, be fixedly mounted on the described low speed turntable, and drive described high speed rotating plate and rotate with respect to described low speed turntable.
Described rotary apparatus also comprises: drive belt, described low speed bearing drive motors is by the described low speed turntable rotation of described driving belt drives; The low speed bearing ball between the outer of the interior edge of described fixedly outer ring and described low speed turntable, is used to support described low speed turntable and rotates with respect to described fixedly outer ring.
Wherein, have the triangle endless groove on a part of outer of described low speed turntable, be used for cooperating with described driving belt; Described low speed bearing ball is at least one row's ball.
Described rotary apparatus also comprises: travelling gear, drive by described high-speed bearing drive motors, and drive described high speed rotating plate rotation.
Wherein, described high speed rotating plate is positioned within the edge of described low speed turntable; This rotary apparatus also comprises: the high-speed bearing ball between the outer of the interior edge of described low speed turntable and described high speed rotating plate, is used to support described high speed rotating plate and rotates with respect to described low speed turntable.
Wherein, the outer of described high speed rotating plate comprises a circle gear, is used to cooperate described travelling gear; Described high-speed bearing ball is at least one row's ball.
Wherein, the width of described low speed turntable is greater than the width of described high speed rotating plate, and its section is the matrix of toppling over, and this matrix comprises the top, bottom and vertical edge; Described high speed rotating plate is between the bottom and upper segment of described low speed turntable; This device also comprises: the high-speed bearing ball between the outer of the inwall of the bottom of described low speed turntable and described high speed rotating plate, is used to support described high speed rotating plate and rotates with respect to described low speed turntable.
Wherein, described high-speed bearing drive motors is fixedly mounted on the inwall of vertical edge of described low speed turntable; The outer of described high speed rotating plate comprises a circle gear, is used to cooperate described travelling gear.
Wherein, described high-speed bearing drive motors is fixedly mounted on the inwall of vertical edge of described low speed turntable; Described high speed rotating plate further comprises an outstanding horizontal stroke edge, and this horizontal stroke is used to cooperate described travelling gear along comprising a circle gear.
Wherein, be installed with the electronic unit of described medical image system on the described high speed rotating plate.
Described rotary apparatus also comprises: slip ring, be installed on described low speed turntable and the described high speed rotating plate, and described medical image system provides power supply by described slip ring for the low speed bearing drive motors and the high-speed bearing drive motors of described rotary apparatus.
Wherein, described fixedly outer ring and low speed turntable are iron hoop.
Wherein, described high speed rotating plate is iron hoop, cast aluminium ring or steel plate ring.
From above technical scheme as can be seen, because rotary apparatus of the present invention has adopted the structure of two floating bearings, low speed turntable is rotated with respect to ground with certain rotation speed, high speed rotating plate rotates with respect to low speed turntable in the same direction with certain rotation speed, high speed rotating plate is above-mentioned two rotary speed sums with respect to the rotary speed on ground so, therefore can reach fair speed with comparalive ease.Simultaneously, the speed because the rotating speed of two bearings does not all reach capacity, the pressure and the frictional force that therefore can not cause the ball of bearing inside to bear sharply increase, and have avoided ball breakage etc. to influence the situation of the operate as normal of system.This shows that the rotary apparatus of the two floating bearings of employing of the present invention not only can improve the rotation rotating speed, has guaranteed the stability of system works.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describing the preferred embodiments of the present invention in detail with reference to accompanying drawing below, identical label is represented identical parts, in the accompanying drawing:
Fig. 1 is front view and the profile that adopts the rotary apparatus of single floating bearing in the existing C T system;
Fig. 2 is the front view and the profile of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention one;
Fig. 3 is the generalized section of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention two;
Fig. 4 is the front view and the profile of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention three;
Fig. 5 is the front view and the profile of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention four.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
According to the present invention, on the rotary apparatus of imaging system, two floating bearings are set: low speed bearing and high-speed bearing, two bearings are driven by low speed bearing driving device and high speed bearing drive device respectively, low speed bearing rotates with respect to ground, and high-speed bearing rotates with respect to low speed bearing.These two floating bearings are made up of three beckets respectively, preferably, can adopt iron hoop or casting iron hoop to form floating bearing.High-speed bearing is positioned on the medical imaging devices from the nearer position of scanning area, and low speed bearing is positioned on the medical imaging devices from scanning area position far away.
Elaborate the rotary apparatus with two floating bearings of the present invention below by should be used in the CT system.
Embodiment one:
Fig. 2 is the front view and the profile of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention one, and wherein left side figure be a front view, and right side figure is A-A ' a profile along left figure.As shown in Figure 2, this rotary apparatus is installed on the hold-down support 251 of CT, comprises two nested floating bearings, and these two nested floating bearings are by fixedly outer ring 211, low speed turntable 212 and high speed rotating plate 213 are formed.Wherein, fixedly outer ring 211, low speed turntable 212 and high speed rotating plate 213 are respectively three iron hoops.
Fixedly the outer side edges of outer ring 211 is fixed on the bearing 251 of CT frame, and the low speed bearing driving device can be a low speed bearing drive motors (or motor) 221, and it is installed on the ground.The base of CT frame can be laid on the ground, and the seat supports at two ends is lived fixedly outer ring 211.
Low speed turntable 212 is nested within the interior edge of fixing outer ring 211, fixedly is a row or several rows low speed bearing ball 231 between a part of outer of the interior edge of outer ring 211 and low speed turntable 212.On another part outer of low speed turntable 212 the triangle endless groove is arranged, cooperate with driving belt 241, low speed bearing drive motors 221 drives low speed turntable 212 by driving belt 241, rotates under the supporting of low speed bearing ball 231.Adopt belt transmission can reduce to impact and noise.
Fixedly the outer of the interior edge of outer ring 211, low speed turntable 212 and low speed bearing ball 231 have constituted low speed bearing, and slow-speed shaft bears the driving of low speed bearing drive motors 221, make low speed turntable 212 with respect to fixedly outer ring 211 rotations, and rotation direction is R1.
High speed bearing drive device adopts high-speed bearing drive motors 222, and it is fixedly mounted on the low speed turntable 212, rotates with low speed turntable 212.The outfan of high-speed bearing drive motors 222 is a travelling gear 242.The place near center of rotation can should be chosen generally speaking according to the practical situation adjustment in the installation site of high-speed bearing drive motors 222 on low speed turntable 212, to reduce the processing capacity of travelling gear 242, to improve precision.
High speed rotating plate 213 is nested within the interior edge of low speed turntable 212, and high-speed bearing drive motors 222 drives high speed rotating plate 213 rotations by travelling gear 242.The direction of rotation of high speed rotating plate 213 is identical with the direction of rotation of low speed turntable 212.The employing gear drive can guarantee the stability under the high rotating speed.
Between the interior edge of low speed turntable 212 and the outer of high speed rotating plate 213 a row or several rows high-speed bearing ball 232 is arranged, simultaneously, the outer of high speed rotating plate 213 also has a circle gear, cooperates with travelling gear 242 on the low speed turntable 212.The system works parts are installed on the high speed rotating plate 213.High speed rotating plate 213 also can be made by other material, for example cast aluminium or steel plate.
The interior edge of low speed turntable 212, high speed rotating plate 213 and high-speed bearing ball 232 have constituted high-speed bearing, and high speed shaft bears the driving of high-speed bearing drive motors 222, and high speed rotating plate 213 is rotated with respect to low speed turntable 212, and rotation direction is R2, and R2 is identical with R1.
For power supply being provided for low speed bearing drive motors 221 and high-speed bearing drive motors 222, the back of low speed turntable 212 and high speed rotating plate 213 should connect the slip ring (not shown) simultaneously, rotates together.The power supply of system and data are transmitted by the carbon brush of slip ring, the mode that concrete mode can adopt the slip ring in the CT system of present extensive use to use.
As mentioned above, low speed turntable 212 is with respect to fixedly outer ring 211 rotations, high speed rotating plate 213 rotates with respect to low speed turntable 212, the rotation direction of the two is identical, so, if low speed turntable 212 is v1 with respect to the fixing rotating speed of outer ring 211, high speed rotating plate 213 is v2 with respect to the rotating speed of low speed turntable 212, and high speed rotating plate 213 is (v1+v2) with respect to the fixing rotating speed of outer ring 211.
In the present embodiment, the relative rotation speed of low speed bearing and the relative rotation speed of high-speed bearing all can reach 0.5 second/commentaries on classics, that is to say, the relative ground of low speed turntable or fixedly the rotating speed of outer ring 211 be 0.5 second/change, high speed rotating plate 213 with respect to the rotating speed of low speed turntable 212 also be 0.5 second/change.Because direction of rotation is identical, therefore, high speed rotating plate 213 with respect to ground or fixedly the absolute rotating speed of outer ring 211 be 0.25 second/change, be higher than CT now 0.33 second of floating bearing in the industry/maximum speed that changes.
The advantage of present embodiment is: low speed bearing and high-speed bearing can adopt identical processing technique because of size is approximate, also can reduce cost.
Embodiment two:
Fig. 3 is the generalized section of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention two, this profile also is the profile along the A-A ' axle of the front view of Fig. 2, different with the profile among Fig. 2 is, Fig. 3 has only shown the section part that has two floating bearings, and does not show whole section part.
Present embodiment and embodiment one are basic identical, also are to have adopted dual bearing structure, and among Fig. 3 with Fig. 2 in back two identical identical parts of Reference numeral presentation function, its function does not repeat them here.As shown in Figure 3, the difference of present embodiment and embodiment one is, low speed bearing drive motors 321 is installed in fixedly on the outer ring 311.In addition, in Fig. 3, also show the X ray tube 361 and the slip ring 371 that are installed on the high speed rotating plate 313.
The advantage of present embodiment is: low speed bearing and high-speed bearing can adopt identical processing technique because of size is approximate, can reduce cost.In addition,, need not special mounting bracket, also provide cost savings because low speed bearing drive motors 321 is installed in fixedly on the outer ring 311.
Embodiment three:
Fig. 4 is the front view and the profile of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention three, and wherein left side figure be a front view, and right side figure is A-A ' a profile along left figure.
Present embodiment and embodiment one are basic identical, and among Fig. 4 with Fig. 2 in back two identical identical parts of Reference numeral presentation function, its function does not repeat them here.As shown in Figure 4, present embodiment and embodiment one difference are that the width of low speed turntable 412 is bigger, and greater than the width of high speed rotating plate 413, its section shape is matrix at least, and this matrix comprises top, bottom and vertical edge.Low speed turntable 412 is enclosed in the inside of its recess with high speed rotating plate 413, and high-speed bearing drive motors 422 is installed on the inwall of vertical edge of low speed turntable 412, and the outer of high speed rotating plate 413 comprises a circle gear, is used to cooperate described travelling gear 442.In addition, except shown in Figure 4, low speed bearing drive motors 421 also can be installed in fixedly on the outer ring 411.
The advantage of present embodiment is: high-speed bearing can adopt less bearing and gear, thereby reduces machining accuracy and cost.And can obtain higher rotating speed, high-speed bearing drive motors 422 can adopt bigger motor, and its installation site is more flexible.
Embodiment four:
Fig. 5 is the generalized section of the rotary apparatus of the two floating bearings of the employing of the embodiment of the invention four, and wherein left side figure be a front view, and right side figure is A-A ' a profile along left figure.
Present embodiment and embodiment one are basic identical, also are to have adopted dual bearing structure, and among Fig. 5 with Fig. 2 in back two identical identical parts of Reference numeral presentation function, its function does not repeat them here.As shown in Figure 5, in the present embodiment, also at least greater than the width of high speed rotating plate 513, its section shape is matrix to the width of low speed turntable 512, and this matrix comprises top, bottom and vertical edge.Low speed turntable 512 is enclosed in the inside of its recess with high speed rotating plate 513, and high-speed bearing drive motors 522 is installed on the inwall of vertical edge of low speed turntable 512.Comprise an outstanding horizontal stroke edge on the high speed rotating plate 513, this horizontal stroke along on comprise one the circle gear, be used to cooperate described travelling gear 542.
The advantage of present embodiment is identical with embodiment three, and high-speed bearing can adopt less bearing and gear, thereby reduces machining accuracy and cost, and can obtain higher rotating speed.High-speed bearing drive motors 522 can adopt bigger motor, and its installation site is more flexible.
Duplex bearing rotational structure of the present invention can be widely used in the various medical image systems that need rotating operation, except that the CT system that uses in the above-described embodiments, can also be applied in the imaging system that other need rotating operation, for example X-ray equipment or non-medical imaging system, to reach high speed rotary, improve the purpose of image taking speed.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the rotary apparatus in the medical image system is characterized in that, comprises at least:
Fixedly outer ring (211,311,411,511) are fixedly mounted on the bearing (251) in the described medical image system;
Low speed turntable (212,312,412,512) is rotated with respect to described fixedly outer ring (211,311,411,511);
The low speed bearing driving device drives described low speed turntable (212,312,412,512) and rotates with respect to described fixedly outer ring (211,311,411,511);
High speed rotating plate (213,313,413,513), with respect to described low speed turntable (212,312,412,512) rotation, and the direction of rotation of direction of rotation and described low speed turntable (212,312,412,512) is identical;
High speed bearing drive device drives described high speed rotating plate (213,313,413,513) and rotates with respect to described low speed turntable (212,312,412,512).
2. rotary apparatus according to claim 1 is characterized in that, described low speed bearing driving device comprises:
Low speed bearing drive motors (221,321,421,521) is fixedly mounted on ground or described fixedly outer ring (211,311,411,511) on, drive described low speed turntable (212,312,412,512) rotate with respect to described fixedly outer ring (211,311,411,511).
3. rotary apparatus according to claim 1 and 2 is characterized in that, described high speed bearing drive device comprises:
High-speed bearing drive motors (222,322,422,522) is fixedly mounted on the described low speed turntable (212,312,412,512), drives described high speed rotating plate (213,313,413,513) and rotates with respect to described low speed turntable (212,312,412,512).
4. rotary apparatus according to claim 2 is characterized in that, also comprises:
Drive belt (241,341,441,541), described low speed bearing drive motors (221,321,421,521) drive described low speed turntable (212,312 by described driving belt (241,341,441,541), 412,512) rotate with respect to described fixedly outer ring (211,311,411,511);
Low speed bearing ball (231,331,431,531), be positioned at described fixedly outer ring (211,311,411,511) interior edge and described low speed turntable (212,312,412,512) between the outer, be used to support described low speed turntable (212,312,412,512) with respect to described fixedly outer ring (211,311,411,511) rotation.
5. rotary apparatus according to claim 4 is characterized in that, has the triangle endless groove on a part of outer of described low speed turntable (212,312,412,512), is used for cooperating with described driving belt (241,341,441,541);
Described low speed bearing ball (231,331,431,531) is at least one row's ball.
6. rotary apparatus according to claim 3 is characterized in that, also comprises:
Travelling gear (242,342,442,542) is driven by described high-speed bearing drive motors (222,322,422,522), drives described high speed rotating plate (213,313,413,513) rotation.
7. rotary apparatus according to claim 6 is characterized in that, described high speed rotating plate (213,313) is positioned within the interior edge of described low speed turntable (212,312);
This rotary apparatus also comprises:
High-speed bearing ball (232,332) is positioned between the outer of the interior edge of described low speed turntable (212,312) and described high speed rotating plate (213,313), is used to support described high speed rotating plate (213,313) and rotates with respect to described low speed turntable (212,312).
8. according to claim 6 or 7 described rotary apparatuss, it is characterized in that the outer of described high speed rotating plate (213,313) comprises a circle gear, is used to cooperate described travelling gear (242,342);
Described high-speed bearing ball (232,332) is at least one row's ball.
9. rotary apparatus according to claim 6 is characterized in that, described low speed turntable (412,512) width is greater than the width of described high speed rotating plate (413,513), and described low speed turntable (412,512) section is the matrix of toppling over, and this matrix comprises the top, bottom and vertical edge;
Described high speed rotating plate (413,513) is positioned between the bottom and upper segment of described low speed turntable (412,512);
This rotary apparatus also comprises:
High-speed bearing ball (432,532) is positioned at described low speed turntable (412, between the outer of the inwall of bottom 512) and described high speed rotating plate (413,513), be used to support described high speed rotating plate (413,513) rotate with respect to described low speed turntable (412,512).
10. rotary apparatus according to claim 9 is characterized in that, described high-speed bearing drive motors (422) is fixedly mounted on the inwall of vertical edge of described low speed turntable (412);
The outer of described high speed rotating plate (413) comprises a circle gear, is used to cooperate described travelling gear (442).
11. rotary apparatus according to claim 9 is characterized in that, described high-speed bearing drive motors (522) is fixedly mounted on the inwall of vertical edge of described low speed turntable (512);
Described high speed rotating plate (513) further comprises an outstanding horizontal stroke edge, and this horizontal stroke is used to cooperate described travelling gear (542) along comprising a circle gear.
12. rotary apparatus according to claim 1 is characterized in that, is installed with the electronic unit of described medical image system on the described high speed rotating plate (213,313,413,513).
13. rotary apparatus according to claim 3 is characterized in that, also comprises:
Slip ring (371,471,571), be installed in described low speed turntable (312,412,512) and described high speed rotating plate (313,413,513) on, described medical image system is by described slip ring (371,471,571) be the low speed bearing drive motors (321,421,521) and the high-speed bearing drive motors (322 of described rotary apparatus, 422,522) provide power supply.
14. rotary apparatus according to claim 1 is characterized in that, described fixedly outer ring (211,311,411,511) and low speed turntable (212,312,412,512) are iron hoop.
15. rotary apparatus according to claim 1 is characterized in that, described high speed rotating plate (213,313,413,513) is iron hoop, cast aluminium ring or steel plate ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100989502A CN101297759B (en) | 2007-04-30 | 2007-04-30 | Rotary device of medicine image-forming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100989502A CN101297759B (en) | 2007-04-30 | 2007-04-30 | Rotary device of medicine image-forming system |
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| CN101297759A CN101297759A (en) | 2008-11-05 |
| CN101297759B true CN101297759B (en) | 2010-04-07 |
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| JP2025500551A (en) | 2021-12-27 | 2025-01-09 | リフレクション メディカル， インコーポレイテッド | Methods for quality assurance of radiation delivery |
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