CN101530652B - An accelerator treatment head for an omnipotent independent collimator with large radiation field - Google Patents
An accelerator treatment head for an omnipotent independent collimator with large radiation field Download PDFInfo
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- CN101530652B CN101530652B CN2009101308057A CN200910130805A CN101530652B CN 101530652 B CN101530652 B CN 101530652B CN 2009101308057 A CN2009101308057 A CN 2009101308057A CN 200910130805 A CN200910130805 A CN 200910130805A CN 101530652 B CN101530652 B CN 101530652B
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- secondary collimator
- collimator
- curvilinear guide
- treatment head
- bearing
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Abstract
An accelerator treatment head for an omnipotent independent collimator with large radiation field comprises a rotary casing, secondary collimators, a curve guide way, a collimator guide way, and a secondary collimator driving component; wherein the rotary casing consists of a gear bearing and a treatment head casing; the secondary collimators are respectively fixedly connected to the guide way inside the casing; the secondary collimator consists of a curve guide way frame, a fixed secondary collimator, and a movable secondary collimator; wherein the an oscillation centre bearing of the movable secondary collimator is respectively connected with the short shafts fixed on the curve guide way frame; one side of the movable secondary collimator is fixedly connected with an eccentric pendulum shaft; and the secondary collimator driving component consists of a servo motor, a bevel gear pair, a bearing base and a ballscrew pair. A secondary collimating system of the treatment head can do asymmetrical movement; as the open and shut of the two pairs of collimators can reach the maximum radiation field at the stroke of the isocenter, when different angles of radiation field are needed in clinic, the treatment head can rotate 90 degrees to meet the requirement.
Description
Technical field
The present invention relates to a kind of clinical medical apparatus and instruments of using, relate in particular to a kind of treatment head, with the radiation field size of control different size and angle with the all-round independent radiation collimation device of big irradiation field.
Background technology
The effect of the accelerator treatment head on medical apparatus and instruments is that radiation streaming is limited in certain zone, obtains the different size of clinical needs and the radiation field size of angle.Prior art has only a collimator can cross central axis, is 20 centimetres in the distance that waits the central plane place, and when needing the different angles irradiation field, because the treatment head needs rotation, but cable distribution has limited its anglec of rotation, can only rotate 270 ° clinical.And there are 90 ° of scopes can't use the complete wild irradiation of two-way dynamic wedge shape.Above two pairs of orthogonal secondary collimator (being commonly called as the tungsten door) have only about the promptly existing treatment head in a pair of secondary collimator one can only be crossed central axis and be made the largest motion distance to offside, 20 centimetres in central plane center line such as promptly cross, it is little to the move distance of offside that its excess-three is only crossed central axis, 10 centimetres in central plane center line such as promptly cross, clinical basic demand is restricted, also can not reaches with secondary collimator and directly transfer strong function.As shown in Figure 3, Figure 4, be to treat head in the prior art respectively at 270 ° and 0 ° of irradiation field rotation canonical schema.As we know from the figure, can do virtual wedge shape treatment when having only a secondary collimator range in original technology, clinical when needing the different angles irradiation field, owing to limited by cable, the treatment head can only rotate in 0 ° to 270 ° scope, and has 90 ° of scopes can't use the complete wild irradiation of two-way dynamic wedge shape.
Summary of the invention
Goal of the invention of the present invention is: the secondary collimating system of treatment head can be made asymmetrical movement, two pairs of secondary collimator can be crossed central axis each other and be made maximum move distance to offside up and down, promptly the move distance in the maximum that waits the central plane place is 21 centimetres, make it the size that in the irradiation field scope of 42 centimetres of 42 cm x, to regulate rectangular field arbitrarily, it is reached utilize secondary collimator directly to transfer the purpose of strong and arbitrarily angled wedge shape open country.Because every collimator can both move in complete wild scope, make the clinical rectangle irradiation field that needs different angles, to rotate 0-270 ° and now only need get final product by half-twist by original treatment head.
The present invention is achieved in that the accelerator treatment head of the all-round independent collimator of a kind of big irradiation field, comprises rotary shell, secondary collimator, curvilinear guide, secondary collimator driven unit; Rotary shell is made up of gear-bearing and treatment head capsule body; The internal fixation circle of gear-bearing is installed on the rotary frame of accelerator, the guide rail of secondary collimator is installed on the inner walls of treatment head respectively, the secondary collimator guide rail is a steel ball line slideway, is fixedly mounted on respectively on the objective intravital guide rail bracket of treatment head capsule body inwall; Secondary collimator is made up of curvilinear guide frame, fixed secondary collimator and activity secondary collimator, and two curvilinear guide framves are connected in the both sides of fixed secondary collimator respectively, and curvilinear guide is then worn in the slot that is placed on the curvilinear guide frame; Activity secondary collimator oscillation center bearing respectively be fixed on the curvilinear guide frame on minor axis be connected activity secondary collimator one side fixedly connected one eccentric balance staff; A roller is installed in the termination of balance staff; Roller is limited in the curvilinear guide groove in the curvilinear guide, the secondary collimator driven unit by servomotor, bevel gear pay, bearing block and ball screw pair form; Servomotor connects successively that a pair of bevel gear is paid, ball-screw; Ball-screw is solid on the external wall of treatment head capsule by ball bearing and bearing block peace, and the nut of ball-screw is installed on the curvilinear guide frame; Pay by bevel gear at servomotor and make the straight line back and forth movement when driving the rotation of ball steel wire there being nut to connect the curvilinear guide frame of secondary collimator and fixed secondary collimator and activity secondary collimator on the line slideway; Balance staff and roller that the activity secondary collimator is arranged on curvilinear guide, they do corresponding swing along the curvilinear guide groove of curvilinear guide, more than the synthetic secondary collimator that makes of two motions can moving linearlies, activity secondary collimator work surface can be pressed the firing angle skimulated motion.The left side of the described activity secondary collimator eccentric balance staff that is connected, with centre bearing at a distance of 27 millimeters; Roller is limited in the interior curvilinear guide of curvilinear guide frame.Each of described fixed or movable secondary collimator collimator adopts independent driving mechanisms and independent built-in curvilinear guide.Described curvilinear guide is worn in the slot that is placed on the curvilinear guide frame, is built-in slidingtype.Each of described fixed or movable secondary collimator collimator is 42 centimetres in the largest motion distance that waits the central plane place, can cross central axis is 21 centimetres in the ultimate range that waits the central plane place, and two collimation devices all form four rib vertebral bodys of respective angles in the space at its work surface of any position.
The present invention is compared to the advantage of prior art: solved existing colimated light system stroke weak point and had only a last secondary collimator can do virtual wedge operation; Can do virtual wedge shape treatment owing to have only a secondary collimator in the prior art, clinical when needing the different angles irradiation field, owing to limited by cable distribution, the treatment head can only rotate and can not meet clinical needs in 0--270 ° of scope, and has 90 ° of scopes can't use the complete wild irradiation of two-way dynamic wedge shape.And the present invention is because the folding of two collimation devices can both reach the maximum illumination open country at the stroke that waits the center, so a treatment anglec of rotation only needs half-twist to get final product.Because each collimator of the present invention adopts independent driving mechanisms and split type collimator and guide thereof, independent built-in curvilinear guide makes its compact conformation; It is the essential condition that has realized high-performance accent intense irradiation method that every collimator can both be crossed the central axis range, because two collimation device work surfaces all form four rib vertebral bodys in the space, so no matter arbitrarily the irradiation field size all is in the double focusing state, promptly the beam that is adjacent all the time in any position of the two pairs of split type collimator work surfaces parallel reach to eliminate to wear penetrate penumbra.Because the range of every collimator self-movement is ± 21 centimetres, so in waiting central plane 42 cm x 42 cm range, can make any big or small rectangular field, as long as any different angles and big or small rectangular field ° can be made in rotation therapy head ± 45 in waiting central plane place 42 cm x, 42 cm range.
Description of drawings
Fig. 1 is a structural profile sketch map of the present invention.
Fig. 2 is an A-A part amplification profile structural representation of the present invention.
Fig. 3 becomes 270 ° of irradiation field rotation canonical schemas for prior art treatment capitiform.
Fig. 4 becomes 0 ° of irradiation field rotation canonical schema for prior art treatment capitiform.
Fig. 5 treats head-45 ° irradiation field rotation canonical schema for the present invention.
Fig. 6 treats head+45 ° irradiation field rotation canonical schema for the present invention.
Fig. 7 is the present invention's treatment 0 ° of irradiation field canonical schema.
Fig. 8 crosses central axis range schematic perspective view for the secondary collimator Y1 that goes up of the present invention.
Fig. 9 crosses central axis range schematic perspective view for the secondary collimator Y2 that goes up of the present invention.
Figure 10 crosses central axis range schematic perspective view for secondary collimator X1 under of the present invention.
Figure 11 crosses central axis range schematic perspective view for secondary collimator X2 under of the present invention.
The specific embodiment
As depicted in figs. 1 and 2, be structural profile sketch map of the present invention and A-A part amplification profile structural representation of the present invention.The treatment head is made up of rotary shell, secondary collimator (upper and lower tungsten door), curvilinear guide, collimator guide rail, secondary collimator driven unit five major parts as seen from the figure.
Rotary shell is made up of the gear-bearing 1 of steel and the treatment head capsule body 2 of steel.Gear-bearing 1 internal fixation circle is installed on the rotary frame 17 of accelerator, and treatment head capsule body 2 upper surfaces are connected with bolt and gear ring lower surface.The upper and lower guide rail 3 of secondary collimator is a steel ball line slideway, is fixedly mounted on treatment head capsule body 2 inwalls respectively, adjusts bolt scalable guide rail 3 degrees of tightness.By pinion and the gear ring engagement that is connected in rotary shell, like this, the treatment head just can rotate according to clinical needs by the servomotor on the rotary frame 17 18.
Two pairs of secondary collimator are connected in respectively on the intravital curvilinear guide 10 of shell of revolution.Secondary collimator is by the curvilinear guide frame 4 of steel, fixed secondary collimator 5 that tungsten alloy material is made and activity secondary collimator 6 are formed, the left and right sides of fixed secondary collimator 5 is used bolting two curvilinear guide framves 4 respectively, solid two minor axises 16 of curvilinear guide frame 4 front ends peace, 7 of activity secondary collimator 6 activity secondary collimator centre bearings respectively be fixed on curvilinear guide 4 on minor axis 16 be connected, activity secondary collimator 6 can be freely swung, the left side of the activity secondary collimator 6 eccentric balance staff 8 that is connected, with apart 27 millimeters of centre bearings 7, form eccentric, a roller 9 is installed in the termination of balance staff 8, and 9 on roller is bumped in the special curved groove of the curvilinear guide 10 that is contained in the curvilinear guide frame 4.
The secondary collimator driven unit by the bevel gear of servomotor 11, steel pay 12, bearing block 13 and ball-screw 14 form.The motion of secondary collimator is passed through a pair of bevel gear 12 by servomotor 11, give ball-screw 14 with power transmission, 13 peaces of the bearing block of ball-screw 14 are solid on treatment head capsule body 2 outer walls, and 15 on the nut of ball-screw 14 is installed in the left side curvilinear guide frame 4.
When servomotor 11 is paid 14 rotations of 12 driving ball-screws by bevel gear, the curvilinear guide frame 4 of nut 15 drive secondary collimator and fixed secondary collimator 5 and activity secondary collimator 6 are made the straight line back and forth movement on line slideway, at this moment, the balance staff 8 of activity secondary collimator 6 and roller 9 are done corresponding swing along the special curvilinear guide groove in the curvilinear guide 10 again, this two motions synthetic makes the secondary collimator can moving linearly, and activity secondary collimator 6 work surfaces again can be by the x-ray angle skimulated motion.Because every secondary collimator all adopts independent driving mechanisms and independent built-in curvilinear guide, make each to secondary collimator when passing over each other central axis motion ultimate range, the curvilinear guide mutually noninterfere, and every secondary collimator crosses central axis and waiting the central plane place to reach 21 centimetres, and promptly every secondary collimator total kilometres are 42 centimetres.The four rib vertebral bodys that two collimation device work surfaces form in the space, no matter the irradiation field size all is in the double focusing state arbitrarily, promptly the work surface of two pairs of split type collimators is parallel at the beam that any position all is adjacent all the time, reaches to eliminate to wear to penetrate penumbra.
Shown in Fig. 5-7, be that the present invention treats head respectively at ± 45 ° and 0 ° of irradiation field rotation canonical schema.As we know from the figure, during every secondary collimator self-movement range, the rotation of treatment head can form any different angles and big or small rectangle irradiation field for ± 45 °.
Shown in Fig. 8-11, be the section schematic perspective view that the upper and lower secondary collimator of the present invention is crossed the central axis range.Be respectively secondary collimator Y1-19 as seen from the figure and cross 210 millimeters of central axis ranges, last secondary collimator Y2-20 crosses 210 millimeters of central axis ranges, following secondary collimator X1-21 crosses 210 millimeters of central axis ranges, and following secondary collimator X2-22 crosses 210 millimeters of central axis ranges.
Claims (5)
1. the accelerator treatment head of the all-round independent collimator of big irradiation field is characterized in that: comprise rotary shell, secondary collimator, curvilinear guide, secondary collimator driven unit; Rotary shell is made up of gear-bearing and treatment head capsule body; The internal fixation circle of gear-bearing is installed on the rotary frame of accelerator, the guide rail of secondary collimator is installed on the inner walls of treatment head respectively, the secondary collimator guide rail is a steel ball line slideway, is fixedly mounted on respectively on the objective intravital guide rail bracket of treatment head capsule body inwall; Secondary collimator is made up of curvilinear guide frame, fixed secondary collimator and activity secondary collimator, and two curvilinear guide framves are connected in the both sides of fixed secondary collimator respectively, and curvilinear guide is then worn in the slot that is placed on the curvilinear guide frame; Activity secondary collimator oscillation center bearing respectively be fixed on the curvilinear guide frame on minor axis be connected activity secondary collimator one side fixedly connected one eccentric balance staff; A roller is installed in the termination of balance staff; Roller is limited in the curvilinear guide groove in the curvilinear guide, the secondary collimator driven unit by servomotor, bevel gear pay, bearing block and ball screw pair form; Servomotor connects successively that a pair of bevel gear is paid, ball-screw; Ball-screw is solid on the external wall of treatment head capsule by ball bearing and bearing block peace, and the nut of ball-screw is installed on the curvilinear guide frame; Pay by bevel gear at servomotor and make the straight line back and forth movement when driving the rotation of ball steel wire there being nut to connect the curvilinear guide frame of secondary collimator and fixed secondary collimator and activity secondary collimator on the line slideway; Balance staff and roller that the activity secondary collimator is arranged on curvilinear guide, they do corresponding swing along the curvilinear guide groove of curvilinear guide, more than the synthetic secondary collimator that makes of two motions can moving linearlies, activity secondary collimator work surface can be pressed the firing angle skimulated motion.
2. treatment head as claimed in claim 1 is characterized in that: the left side of the described activity secondary collimator eccentric balance staff that is connected, with centre bearing at a distance of 27 millimeters; Roller is limited in the interior curvilinear guide of curvilinear guide frame.
3. treatment head as claimed in claim 1 is characterized in that: each of described fixed or movable secondary collimator collimator adopts independent driving mechanisms and independent built-in curvilinear guide.
4. treatment head as claimed in claim 1 is characterized in that: described curvilinear guide is worn in the slot that is placed on the curvilinear guide frame, is built-in slidingtype.
5. treatment head as claimed in claim 1, it is characterized in that: each of described fixed or movable secondary collimator collimator is 42 centimetres in the largest motion distance that waits the central plane place, can cross central axis is 21 centimetres in the ultimate range that waits the central plane place, and two collimation devices all form four rib vertebral bodys of respective angles in the space at its work surface of any position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101308057A CN101530652B (en) | 2009-04-15 | 2009-04-15 | An accelerator treatment head for an omnipotent independent collimator with large radiation field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101308057A CN101530652B (en) | 2009-04-15 | 2009-04-15 | An accelerator treatment head for an omnipotent independent collimator with large radiation field |
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| Publication Number | Publication Date |
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| CN101530652A CN101530652A (en) | 2009-09-16 |
| CN101530652B true CN101530652B (en) | 2011-01-19 |
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| CN2009101308057A Expired - Fee Related CN101530652B (en) | 2009-04-15 | 2009-04-15 | An accelerator treatment head for an omnipotent independent collimator with large radiation field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103706042B (en) * | 2013-11-14 | 2016-06-01 | 山东新华医疗器械股份有限公司 | Four-dimensional tracking radiotherapy system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005058293A (en) * | 2003-08-20 | 2005-03-10 | Mitsubishi Heavy Ind Ltd | Radiation therapy system |
| CN1721016A (en) * | 2004-07-16 | 2006-01-18 | 深圳市益普生医疗设备发展有限公司 | Head stereoscopic precise positioning device for accelerator |
| CN201379907Y (en) * | 2009-04-15 | 2010-01-13 | 杨少鑫 | Large-illumination-field linac head with omnipotent independent collimator |
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2009
- 2009-04-15 CN CN2009101308057A patent/CN101530652B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005058293A (en) * | 2003-08-20 | 2005-03-10 | Mitsubishi Heavy Ind Ltd | Radiation therapy system |
| CN1721016A (en) * | 2004-07-16 | 2006-01-18 | 深圳市益普生医疗设备发展有限公司 | Head stereoscopic precise positioning device for accelerator |
| CN201379907Y (en) * | 2009-04-15 | 2010-01-13 | 杨少鑫 | Large-illumination-field linac head with omnipotent independent collimator |
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| CN101530652A (en) | 2009-09-16 |
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Granted publication date: 20110119 Termination date: 20170415 |