CN1046860C - Single-arm rotation focusing type radiotherapy apparatus - Google Patents
Single-arm rotation focusing type radiotherapy apparatus Download PDFInfo
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- CN1046860C CN1046860C CN94107525A CN94107525A CN1046860C CN 1046860 C CN1046860 C CN 1046860C CN 94107525 A CN94107525 A CN 94107525A CN 94107525 A CN94107525 A CN 94107525A CN 1046860 C CN1046860 C CN 1046860C
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- vacuum tube
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- rotary frame
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Abstract
The present invention provides an improved medical rotary focusing radiation ray therapeutic device. The present invention is provided with a fixed vacuum pipe and a rotating vacuum pipe, wherein the fixed vacuum pipe is communicated with an electronic gun, and the revolution of the rotating vacuum pipe is synchronized with the revolution of rotary electron beams. The rotation of deflecting electron beams is realized through the revolution of the rotating vacuum pipe, and the deflection focusing of rays in view of a focal point is realized through focusing deflecting coils which rotate along with the rotating vacuum pipe.
Description
The present invention proposes a kind of improved rotary focus type radioactive device, belongs to medical radiation cure equipment, and the lonizing radiation that particularly utilize electron linear accelerator to produce act on the therapy equipment of human body.
Background technology of the present invention is to utilize the electron beam of rotation or X ray that the human lesion tissue is focused on irradiation, reaches the device of therapeutic purposes.United States Patent (USP) 5267294 has proposed a kind of device that makes the lonizing radiation rotating focus, and this device utilizes a stand to make electron accelerator make circular motion thereon, and light beam shines in a public focus from the different angles of a circumference.Such device can reach and make the lonizing radiation rotating focus in pathological tissues, thereby avoids the fixing continuously injury that causes by a certain tissue of single beam line.But the purpose of this patent is to realize with pure mechanical means, need a very complicated mechanism to make the device rotation of generation lonizing radiation, and from this patent as seen, mechanism moves along a fixed circular orbit, its lonizing radiation form a taper seat, that is to say that lonizing radiation are always with a constant angles incident focus, form the radiation dose field of a constant magnitude, and what often need in clinical treatment is the radiation dose field of a variation, relies on mechanical means obviously and realizes that this geometric focusing is very difficult.As having made innovation in this field by 94102458.X in the Chinese patent that one of designer of the present invention submitted to, this scheme is not used traditional mechanical means, but the high energy electron beam steering is done 360 ° of revolutions along a loudspeaker face with rotary deflecting coil, one group of focus deflection coil of reuse is realized the variation of radiation dose field with rotating electron beam deflection incident focus once more from different perspectives by the variation of ray angle of incidence.Because rotating electron beam is to make circular motion along a taper seat, this scheme structurally needs a very big tubaeform vacuum chamber, for the design of deflection coil with arrange complicated requirement is all arranged.
The objective of the invention is to provide that a kind of structure is more simple, the radiotherapy apparatus that utilizes rotating electron beam to focus on of technical easier realization.
The objective of the invention is to take following mode to finish: the present invention still is the mode that adopts twice deflection focusing of electron beam, different is to have adopted a single armed rotational structure, make vacuum chamber be divided into two fixedly vacuum tube and rotation vacuum tubes with independent vacuum system, fixedly vacuum tube communicates with electron gun, the rotation vacuum tube is the folding arm morpheme in the fixing Way out of vacuum tube, be fixed on the rotary frame that to make circular motion, rotary deflecting coil is along the folding arm area configurations of rotation vacuum tube, the focus deflection coil is arranged along the oblique arm upside of rotation vacuum tube, its the action of a magnetic field power is towards a public focus of vacuum chamber inboard, the focussed collimated system that comprises target and collimator also is mounted on the rotary frame, is positioned at the focus deflection coil on the path of the action of a magnetic field force direction of public focus.In this device busy state, the rotation vacuum tube is with the revolution of rotary frame, its oblique arm is partly made circular motion along taper seat, the high-frequency electronic bundle that electron gun produces from the fixing vacuum tube port of export by and the space that rotates between the vacuum tube inject the rotation vacuum tube, folding arm place at the rotation vacuum tube is deflected by the action of a magnetic field of rotary deflecting coil, and the angle of deflection is consistent with the knuckle of rotation vacuum tube, and with the rotation vacuum tube be rotarily formed the rotating electron beam of making circular motion along a taper seat synchronously, because rotating electron beam has constant path all the time with respect to the rotation vacuum tube, and be in all the time in the magnetic field range of the focus deflection coil that moves with rotation vacuum tube oblique arm, behind certain focus deflection coil electricity, the action of a magnetic field power that this focus deflection coil produces makes rotating electron beam deflection once more, the focused beam of focus is injected in formation by target and collimator, and when another focus deflection coil electricity, can form focused beam again with another angle of incidence.
In the technical scheme that the present invention proposes, adopted one and the synchronous rotating rotation vacuum tube of rotating electron beam, deflection coil also rotates thereupon, realizes twice deflection focusing of electron beam.Its function is more reliable, structure is more reasonable, and the requirement on design, technology and the layout of deflection coil is also more oversimplified, and realizes the requirement of control automatically easily, thereby also has more practicality.
Be described further below in conjunction with drawings and Examples.
Fig. 1 is the principle schematic of single armed rotating focus structure of the present invention.
Fig. 2 is the structural representation of the embodiment of the invention.
With reference to Fig. 1, after the straight line electron bundle (12) that sends from fixing vacuum tube (1) enters the rotation vacuum tube (2) of folding arm shape, the action of a magnetic field that is subjected to being positioned at the rotary deflecting coil (3) at knuckle place deflects, be rotarily formed rotating electron beam (10) with rotation vacuum tube (2), rotating electron beam (10) turns round along a conical surface synchronously with the oblique arm of rotation vacuum tube (2), in a single day on the path of its operation, be subjected to the action of a magnetic field of certain focus deflection coil (5), will deflect once more, inject the focused beam (11) of focus (9) with the angle of incidence formation of this coil magnetic field force direction.
With reference to Fig. 2, rotate vacuum tube (2) in the present embodiment and realize circular motion by a rotary frame (4), rotary deflecting coil (3), focus deflection coil (5), collimator (7) and target (6) all are fixed on rotary frame (4) and go up with rotation vacuum tube (2) rotation synchronously.Rotary frame (4) can be that the knot of support more than is equal, help the installation and the configuration of stability of structure and auxiliary equipment, the centre frame of rotary frame (4) is used for fixing rotary deflecting coil (3) and rotation vacuum tube (2) straight-arm part, a side stand is used for fixing oblique arm part and focus deflection coil (5), collimator (7) and the target (6) of rotation vacuum tube (2), other side stand can be used for installing vacuum pump, electric device and actuating device.Rotary frame (4) is to move on the circular orbit of an annular gantry (8), adopts a kind of slip or roller connecting mode.Fixedly vacuum tube (1) communicates with electron gun, leave one section space between the entrance point of its port of export and rotation vacuum tube (2), because this section space is minimum, value is in several millimeters scope, so electron beam has only very little energy loss by this section space the time.The aperture of rotation vacuum tube (2) is with fixedly vacuum tube (1) is consistent, the employing stainless steel material is made, its entrance point the and fixedly port of export of vacuum tube (1) is useful is suitable for " window " that metal material that electron beam passes through is made, electron beam enters rotation vacuum tube (2) by this two " window ", an inboard row in addition is used for " window " that focused beam is walked at the oblique arm of rotation vacuum tube (2), focused beam is got on the target (6) by " window ", and the position that requires these " windows " is corresponding with the collimating aperture of the action of a magnetic field force direction of focus deflection coil (5) and collimator (7).The knuckle α of rotation vacuum tube (2) is consistent with the deflection angle of rotating electron beam, and span is at 40～65 °.In the present embodiment, rotary deflecting coil (3) is fixed on the rotary frame (4), rotate with vacuum tube (2), be subjected to deflection coil (3) the action of a magnetic field power and the electron beam of deflection be in all the time the rotation vacuum tube (2) constant position in, and form rotating electron beam with the rotation of vacuum tube (2), therefore, the speed of control rotary frame (4) just can be controlled the speed of rotating electron beam.Focus deflection coil (5) is close to the arrangement of rotation vacuum tube (2) oblique arm, and all different with respect to the angle of incidence β of focus point (9), each focus coil all has independent design, and utilizes collimator (7) to revise angle of incidence, guarantees focusing accuracy.Consider the formation of different radiation dose field, the span that is focused into firing angle β in the present embodiment is 25～75 °.Adopt this single arm type structure of present embodiment, central axis and focus point (9) are on the radial section all the time with collimating aperture, target (6) and the electron beam of collimator (7), adopt fabricated structural manufacturing process can guarantee the accuracy and the reliability of its rotating focus.Bigger retractility is determined also to have in focus point (9) position, and present embodiment is from the consideration that needs of treatment general tumour, and focus (9) is positioned under the stand (8), leaves the position of being large enough to hold people's body thickness between focus (9) and stand (8).In the present embodiment, the design energy of electron beam is 4～6Mev, and is adjustable in 10～100 rev/mins of scopes of the speed of rotation, and focused beam penetrates target (6) and produces X ray, and the collimating aperture by collimator (7) forms a branch of more accurate focused radiation.
Claims (5)
1. medical focus type radioactive therapeutic apparatus, has a vacuum chamber that can make electron beam along the taper seat rotation, and be installed in rotary deflecting coil (3) and some focus deflection coils (5) on the vacuum chamber, the action of a magnetic field power of these focus deflection coils (5) is towards a public focus (9) of vacuum chamber inboard, it is characterized in that described vacuum chamber is divided into two fixedly vacuum tube (1) and rotation vacuum tubes (2) with independent vacuum system, fixedly vacuum tube (1) communicates with electron gun, rotation vacuum tube (2) becomes the folding arm morpheme in fixing vacuum tube (1) Way out, be fixed on the rotary frame (4) that to make circular motion, rotary deflecting coil (3) is along rotation vacuum tube (2) folding arm area configurations, and focus deflection coil (5) is arranged along the oblique arm upside of rotation vacuum tube (2).
2. radiotherapy apparatus according to claim 1, it is characterized in that the focussed collimated system that comprises target (6) and accurate true device (7) is installed on the rotary frame (4), is positioned at focus deflection coil (5) on the path of the action of a magnetic field force direction of public focus (9).
3. radiotherapy apparatus according to claim 1 and 2 is characterized in that rotary deflecting coil (3) is fixed on the rotary frame (4).
4. radiotherapy apparatus according to claim 3, tool are characterised in that rotary frame (4) is many supporting structures.
5. radiotherapy apparatus according to claim 4 is characterized in that rotary frame (4) is to move on the circular orbit of an annular gantry (8), adopt and slide or the roller connecting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94107525A CN1046860C (en) | 1994-07-01 | 1994-07-01 | Single-arm rotation focusing type radiotherapy apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94107525A CN1046860C (en) | 1994-07-01 | 1994-07-01 | Single-arm rotation focusing type radiotherapy apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1114230A CN1114230A (en) | 1996-01-03 |
| CN1046860C true CN1046860C (en) | 1999-12-01 |
Family
ID=5033110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94107525A Expired - Fee Related CN1046860C (en) | 1994-07-01 | 1994-07-01 | Single-arm rotation focusing type radiotherapy apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046860C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7194061B2 (en) * | 2004-09-14 | 2007-03-20 | Kabushiki Kaisha Toshiba | X-ray computer tomography apparatus |
| CN108478941B (en) | 2018-04-28 | 2021-04-27 | 西安大医集团股份有限公司 | Radiotherapy device |
| CN108744311A (en) * | 2018-06-14 | 2018-11-06 | 宋世鹏 | X-ray self-focusing radiographic source and its application method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248774A1 (en) * | 1986-04-30 | 1987-12-09 | Elekta Instrument S.A. | Arrangement in a gamma unit |
| US4827491A (en) * | 1986-10-30 | 1989-05-02 | New York University | Radiosurgical collimator knife |
| US5267294A (en) * | 1992-04-22 | 1993-11-30 | Hitachi Medical Corporation | Radiotherapy apparatus |
-
1994
- 1994-07-01 CN CN94107525A patent/CN1046860C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248774A1 (en) * | 1986-04-30 | 1987-12-09 | Elekta Instrument S.A. | Arrangement in a gamma unit |
| US4827491A (en) * | 1986-10-30 | 1989-05-02 | New York University | Radiosurgical collimator knife |
| US5267294A (en) * | 1992-04-22 | 1993-11-30 | Hitachi Medical Corporation | Radiotherapy apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1114230A (en) | 1996-01-03 |
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| CF01 | Termination of patent right due to non-payment of annual fee |