CN2523450Y - Multi-blade calibrator with linear shifting driving blade - Google Patents
Multi-blade calibrator with linear shifting driving blade Download PDFInfo
- Publication number
- CN2523450Y CN2523450Y CN 01257618 CN01257618U CN2523450Y CN 2523450 Y CN2523450 Y CN 2523450Y CN 01257618 CN01257618 CN 01257618 CN 01257618 U CN01257618 U CN 01257618U CN 2523450 Y CN2523450 Y CN 2523450Y
- Authority
- CN
- China
- Prior art keywords
- blade
- leaf
- collimator
- linear potentiometer
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a multi-leaf collimator which adopts linear displacement driven leaves and can position the forming position accurately, including a leaf mounting bracket, a leaf guide frame, and a leaf displacement detection device which is connected with the leaf frame and the leaf bracket, the leaf displacement detection device includes at least one linear potentiometer which is fixedly connected with the leaf frame and is arranged parallelly with the side edge of the leaf mounting bracket, and an electric brush slice which is fixedly connected with the leaf support and is electrically contacted with the surface of an electric resistance wire of the linear potentiometer in a sliding way, the linear potentiometer and the electric brush slice are respectively electrically connected with a control device in the collimator; during the movement of the leaves, the electric brush slice can slide by the electric resistance wire on the linear potentiometer which is contacted with the electric brush slice continuously, the electric brush slice can output the different partial pressure values to the control device, the utility model can accurately display the positions of the leaves after the processing by the control device, so as to accurately control the forming position of the leaves; compared with the traditional collimators, the utility model has the advantages of simple structure, small occupying space, low cost, accurate forming and so on.
Description
Technical field
This utility model relates to radiotherapy equipment, is specifically related to the multi-blade collimator that a kind of its blade that is used for radiotherapy equipment adopts straight-line displacement to drive.
Background technology
In the prior art; multi-blade collimator is and the supporting use of radiotherapy apparatus; be used to do suitable shape and transfer the strong a kind of equipment that waits treatment; its essential structure and operation principle are; by the multi-disc shielding blade (being generally tungsten alloy) in the mobile collimator; its end is formed and the corresponding figure of focus; the treatment ray that radiotherapy apparatus is sent retrains; after making the focus shape of ray by the blade composition; the shape of ray and focus basically identical; can realize protecting normal structure, improve the purpose of radiological dose, thereby improve therapeutic effect.
The adjustment structure of the multi-blade collimator that is now adopted is the guiding mechanism that all is provided with drive motors and members composition blades such as screw mandrel that matches or steel wire rope on each sheet blade of each group, the drive motors that control device drives respectively on each sheet blade carries out the suitable shape adjustment of blade and focus, it in the forming process of each sheet blade the last shaping position of determining blade by the revolution of control drive motors, because the mismatch error and the driving error of drive disk assemblies such as motor and drive lead screw, make that the shaping position of blade is not position accurately, for addressing this problem, in collimator, also be provided with the checkout gear of blade shaping position, its detection method be on each group blade frame of collimator, be provided with profile that shaping position detection head (shooting or infrared detection) detects the blade formed thereby whether with require to be consistent, whether the shaping position that is each sheet blade is accurate, there is the blade of error to adjust accordingly again for shaping position, consistent with the focus shape, to guarantee chemotherapy effect, the shortcoming of the blade shaping position checkout gear of this collimator is, the complex structure of device, the cost height, it is big to take up room, thereby make that the overall volume of collimator is excessive, and the adjustment time of blade is long, accuracy is not high, and the life-span is short.
The innovation and creation content
The technical problems to be solved in the utility model is, a kind of multi-blade collimator of straight-line displacement driven vane is provided, can make each the sheet blade in the collimator begin to move in the mobile end process, all can send displacement data accurately to the blade mobile controller, make the shaping position of collimator blade more accurate, curring time is short, the efficient height, and simple in structure, volume is little, is easy to realize.
The technical solution of the utility model is, constructs a kind of multi-blade collimator, comprises blade installation support, blade guide housing and the blade displacement checkout gear that is connected with described blade rack and blade guide housing.
In the above-mentioned collimator that provides according to this utility model, described blade displacement checkout gear comprises and blade frame Joint, and at least one linear potentiometer that be arranged in parallel with described blade installation support side, with described blade rack Joint, and the brush plate that slides and electrically contact with the resistance wire of described linear potentiometer surface, described linear potentiometer and described brush plate are electrically connected with control device in the collimator respectively.
In the above-mentioned collimator that provides according to this utility model, described linear potentiometer can be arranged on described blade installation support upper side edge above.
In the above-mentioned collimator that provides according to this utility model, also described linear potentiometer can be arranged on described blade installation support lower side below.
In the above-mentioned collimator that provides according to this utility model, described linear potentiometer comprises the sensor bar that is list structure, be fixed on resistance wire on described sensor bar one side, be arranged on the binding post on another side of described sensor bar.
The multi-blade collimator of the straight-line displacement driven vane that enforcement this utility model provides, when blade moves, the brush plate that is arranged on the blade can slip over resistance wire on the linear potentiometer that is in contact with it continuously, if on linear potentiometer, be added with detection voltage, because the diverse location that brush plate slipped over is all inequality with respect to the resistance value of voltage input end, brush plate will be exported different voltage partial pressure value and give control device, after discharge circuit in control device is handled, the position display at blade place can be come out, thereby can accurately control the shaping position of blade, compare with traditional checkout gear, have simple in structure, it is little to take up room, and accurate efficient advantages of higher is shaped.
Description of drawings
Fig. 1 is the structural representation of the multi-blade collimator of this utility model straight-line displacement driven vane;
Fig. 2,3 is arranged on structural representation in the collimator for this utility model blade pairing.
The specific embodiment
As shown in Figure 1, the multi-blade collimator of the straight-line displacement driven vane that provides by this utility model, be that a displacement detector is set on former blade mounting bracket and blade guide housing, its testing principle is directly the displacement state of blade to be fed back to control device with the form of the signal of telecommunication, make checkout gear and control device constitute a closed loop displacement detecting control system, realize the accurate control that each blade displacement drives in the collimator.
As Fig. 1,2, shown in 3, the blade displacement checkout gear that is provided by present embodiment is a kind of and blade guide housing Joint, and the linear potentiometer that be arranged in parallel with blade installation support side, the corresponding brush plate 3 that on the side of blade rack, is connected with, brush plate 3 can slide with the linear potentiometer surface and be electrically connected, linear potentiometer and brush plate 3 are electrically connected with control device in the collimator respectively, if on linear potentiometer, add detection voltage, when blade 5 is mobile under the effect of driving device 1, the brush plate 5 that is connected with blade 5 changes (divider resistance changes) because of the contact position with linear potentiometer, the voltage partial pressure value that output is different is given control device, control device can be exported control signal corresponding according to detection signal, and accessory drive 1 makes blade be positioned correct shaping position.
The connected mode of linear potentiometer setting and blade frame has two kinds, a kind of be arranged on blade installation support upper side edge above, present embodiment adopts this a kind of set-up mode, as shown in Figure 1; Another kind of set-up mode is following (attached not shown in the figures) that linear potentiometer is arranged on blade installation support lower side.
As shown in Figure 3,, be provided with the sensor bar 22 that is list structure, on a side of sensor bar, be provided with straight line resistance wire 21, on another side of sensor bar 22, be provided with binding post 4, be convenient to be electrically connected with control device by the linear potentiometer that this utility model provides.
The collimator blade of the straight-line displacement driven vane that provides by this utility model, adopt linear potentiometer that blade is carried out displacement detecting, compare with traditional collimator apparatus, have simple in structure, volume is little, cost is low, accuracy of detection is high, advantages such as shaping position is accurate are the better collimator blades of a kind of serviceability.
Claims (5)
1, a kind of multi-blade collimator of straight-line displacement driven vane comprises blade installation support and blade guide housing, it is characterized in that, also comprises the blade displacement checkout gear that is connected with described blade rack and blade guide housing.
2, according to the described collimator of claim 1, it is characterized in that, described blade displacement checkout gear comprises and blade frame Joint, and at least one linear potentiometer that be arranged in parallel with described blade installation support side, with described blade rack Joint, and the brush plate that slides and electrically contact with the resistance wire of described linear potentiometer surface, described linear potentiometer and described brush plate are electrically connected with control device in the collimator respectively.
3, according to the described collimator of claim 2, it is characterized in that, described linear potentiometer be arranged on described blade installation support upper side edge above.
4, according to the described collimator of claim 2, it is characterized in that, described linear potentiometer be arranged on described blade installation support lower side below.
According to the described collimator of one of claim 2-4, it is characterized in that 5, described linear potentiometer comprises the sensor bar that is list structure, be fixed on resistance wire on described sensor bar one side, be arranged on the binding post on another side of described sensor bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257618 CN2523450Y (en) | 2001-10-23 | 2001-10-23 | Multi-blade calibrator with linear shifting driving blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257618 CN2523450Y (en) | 2001-10-23 | 2001-10-23 | Multi-blade calibrator with linear shifting driving blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2523450Y true CN2523450Y (en) | 2002-12-04 |
Family
ID=33666327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01257618 Expired - Fee Related CN2523450Y (en) | 2001-10-23 | 2001-10-23 | Multi-blade calibrator with linear shifting driving blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2523450Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452246C (en) * | 2001-10-23 | 2009-01-14 | 深圳市一体智能技术有限公司 | Forming detection method of multi-blade collimator and multi-blade collimator |
| CN104519958A (en) * | 2012-07-19 | 2015-04-15 | 德国癌症研究中心 | Leaf module for a multi-leaf collimator and multi-leaf collimator |
-
2001
- 2001-10-23 CN CN 01257618 patent/CN2523450Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452246C (en) * | 2001-10-23 | 2009-01-14 | 深圳市一体智能技术有限公司 | Forming detection method of multi-blade collimator and multi-blade collimator |
| CN104519958A (en) * | 2012-07-19 | 2015-04-15 | 德国癌症研究中心 | Leaf module for a multi-leaf collimator and multi-leaf collimator |
| CN104519958B (en) * | 2012-07-19 | 2017-04-19 | 德国癌症研究中心 | Leaf module for a multi-leaf collimator and multi-leaf collimator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |