WO2003000342A1 - Dispositif de guidage pour source de radiations montee sur l'arriere - Google Patents

Dispositif de guidage pour source de radiations montee sur l'arriere Download PDF

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Publication number
WO2003000342A1
WO2003000342A1 PCT/CN2001/001629 CN0101629W WO03000342A1 WO 2003000342 A1 WO2003000342 A1 WO 2003000342A1 CN 0101629 W CN0101629 W CN 0101629W WO 03000342 A1 WO03000342 A1 WO 03000342A1
Authority
WO
WIPO (PCT)
Prior art keywords
source
guide
ring
limit
radiation source
Prior art date
Application number
PCT/CN2001/001629
Other languages
English (en)
Chinese (zh)
Inventor
Liping Wang
Original Assignee
Liping Wang
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liping Wang filed Critical Liping Wang
Publication of WO2003000342A1 publication Critical patent/WO2003000342A1/fr

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Classifications

    • 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
    • A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
    • A61N5/1007—Arrangements or means for the introduction of sources into the body
    • 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
    • A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
    • A61N5/1007—Arrangements or means for the introduction of sources into the body
    • A61N2005/1008—Apparatus for temporary insertion of sources, e.g. afterloaders

Definitions

  • the present invention relates to a brachytherapy machine mainly used for tumor treatment and cardiovascular radiotherapy, and in particular, the present invention relates to a lead-out device for a radiation source after-installed.
  • the radiation source derivation device can be adapted to smaller and smaller radiation sources.
  • the transmission mechanism of the radiation source since the annular groove wheel, the front duct, the rear duct and the belt guide are all fixedly installed, the transmission mechanism of the radiation source must be flexibly rotated, and the duct and the loop
  • the gap between the sheave, the belt pulley and the catheter must be very small, and the processing accuracy of each component must be very high.
  • the assembly of the equipment is also difficult, especially for driving the radiation source below 1 mm, and the processing and assembly of each component. It is even more difficult, so the invention cannot meet the requirements for the use of smaller radioactive sources.
  • the purpose of the present invention is to have various advantages in the Chinese patent ZL981198333.3 of the present inventor, and enable the post-installation machine to adapt to drive a smaller radiation source.
  • the source transmission mechanism can be flexibly rotated, and the gap between the source guide block and the annular groove wheel, the belt guide wheel and the source guide block is very small, so that the source guide block and the annular groove wheel are in an adaptive state during operation.
  • it is very easy to assemble and adjust, and it is more convenient to install and disassemble the radioactive source.
  • a transmission device capable of safely driving a smaller and smaller rear-mounted radioactive source includes: an annular grooved wheel; a side of the annular grooved wheel is respectively provided with a leading source block and a trailing source block with a guide rail, and the guide rail is contained in the annular groove wheel In the groove of the groove, the outer side of the annular grooved wheel is wrapped with a belt through a belt guide wheel, and a radioactive source steel wire with a radioactive substance at one end of a predetermined length passes through the groove. By friction transmission, one is fixed on the annular grooved wheel.
  • the main gear and the ring groove wheel are controlled by a driving motor, which are characterized by:
  • a guide block support mechanism composed of a guide block support base, a guide block shaft, a spiral guide tube and a spiral tube jacket is provided.
  • the guide block support support is provided with a front guide tube and a rear guide guide.
  • the groove is drawn out by the guide source block supported by the guide block support mechanism; and a guide wheel support mechanism composed of a guide wheel support base, an arc groove, a support shaft, a guide wheel shaft, and a guide wheel support base fixing screw is also provided.
  • the gap between the belt guide wheel and the source guide block can be easily adjusted through the guide wheel bracket mechanism.
  • the invention can also be provided with a limit gear, an inner ring, a middle ring with a landslide and a stop, an outer ring ring gear, a limit arm with teeth, a limit compression spring, a compression spring sleeve and a compression spring sleeve
  • a three-ring limit mechanism composed of fixing screws.
  • a limit post is provided on the limit arm.
  • the inner ring and the outer ring gear are fixed on the ring groove wheel.
  • the middle ring can be between the inner ring and the outer ring gear.
  • an adjustable source-to-center limit device consisting of a center micro switch, a slide guide, a slide sleeve, a positioning bolt, and a stylus can be set at the end of the rear duct.
  • the moving switch is fixed on the sliding sleeve on the sliding guide rail;
  • a positioning device composed of a source-out limit micro-switch and a micro-switch holder can be provided to prevent the source from exceedingly long;
  • a rotary encoder can also be provided, It is used to detect the rotation angle of the drive motor.
  • the front duct can also be provided with an outsource positioning detection device consisting of an outsource detection photoelectric switch and a photoelectric switch bracket. It can also be provided with a radiation protection tank. It passes through and forms a Z shape in the radiation protection tank.
  • a treatment catheter connector may also be provided to connect with a treatment tube inserted into the human body.
  • the installation sequence of the present invention is as follows:
  • the source guide block can be rotated on the guide block shaft, so that the guide rail on the source block is contained in the groove of the annular groove wheel.
  • the drive motor drives the annular grooved wheel to rotate when the source is installed.
  • the radioactive source is sent out because the guide rail on the source guide block is contained in the groove of the annular grooved wheel, and the source guide block and the guide block support seat are elastic.
  • the spiral tube is soft-connected, so when the annular groove wheel has some radial and axial runouts during operation, the source guide block can also adaptively follow the groove wheel without jamming.
  • the initial source position of the radioactive source when the radioactive source passes the photoelectric switch.
  • the limit post on the limit arm approaches the source limit micro-switch as the ring groove wheel rotates. Due to the role of the limit column, if the source exceeds the maximum length, the limit column will encounter the source limit micro-switch, and the drive motor will be stopped, making it impossible for the radioactive source to be sent out and the machine to be installed after leaving .
  • the friction between the belt of the device and the radiation source is a fixed constant.
  • the friction can be adjusted very easily, and the adjustment is easy.
  • the operation of the radiation source is very stable.
  • the loading and unloading source is extremely convenient.
  • FIG. 1 is an overall schematic diagram of a radiation source derivation device for a post-installed radiation source of the present invention
  • FIG. 3 is a schematic diagram of an outer ring gear according to the present invention.
  • FIG. 4 is a schematic diagram of a three-ring limit mechanism of the present invention.
  • FIG. 5 is a schematic diagram of a middle ring of the present invention.
  • FIG. 6 is a schematic diagram of a limit arm of the present invention.
  • FIG. 7 is a schematic diagram of a guide block support mechanism of the present invention.
  • FIG. 8 is a schematic diagram of a guide wheel bracket mechanism of the present invention.
  • FIG. 9 is a schematic diagram of a source block of the present invention.
  • FIG. 10 is a schematic diagram of the adjustable source-to-center limit device of the present invention.
  • leading source block 30 and the trailing source block 31 are mounted on the guide block shaft 32, and the leading source block 30 and the trailing source block 31 can rotate on the guide block axis 32, so that the leading source block 30 and the trailing source block A guide rail 42 on 31 is contained in the groove 24 of the annular sheave 1.
  • the spiral guide tubes 38 and 40 and the spiral tube jackets 39 and 41 are used to connect the front guide source block 30 and the rear guide source block 31 to the guide block support base 29. Radially adjust between the leading source block 30 and the trailing source block 31 and the annular sheave 1 To the desired position, and then fix the guide block bracket seat 29 on the supporting plate 28. Connect the front catheter 4 and the rear catheter 3 to the guide block holder 29.
  • the guide wheel bracket shaft 34 is fixed on the supporting plate 28, and the belt guide wheel 5 is mounted on the guide wheel shaft 35 on the guide wheel bracket base 33.
  • the guide wheel bracket base 3 can rotate on the guide wheel bracket shaft 34.
  • the limiting gear 13 is fixed on the supporting plate 28 through a shaft 27, and the limiting gear 13 can rotate around the shaft 27.
  • the limit arm 9 is provided on the limit arm 43 with the teeth 49.
  • the landslide 47 on the middle ring 11 lifts the limit arm 43 so that the limit arm 43 reaches the middle ring 11.
  • the position of the stopper 48 disengages the teeth 49 on the limit arm 43 from the teeth on the outer ring gear 12, so that the limit arm 43 can rotate around the shaft 27. If the middle ring 11 is rotated in the reverse direction again, the teeth 49 on the limit arm 43 can be engaged with the teeth on the outer ring ring 12.
  • a limit pressure spring 45 is mounted on the limit arm 43 to press the limit arm 43.
  • the limit pressure spring 43 is covered with a compression spring sleeve 44, and then the compression spring sleeve 44 is fixed to the inner ring with a compression spring sleeve fixing screw 46.
  • the limit gear 13 is meshed with the main gear 2, and the main gear 2 is coaxially connected with the ring sheave 1.
  • the annular sheave 1 is controlled by a driving motor 25, and a rear shaft of the driving motor 25 is connected to a rotary encoder 26.
  • the rotary encoder 26 is used to detect a rotation angle of the driving motor 25.
  • a front guide source block 30 and a rear guide source block 31 are respectively provided on the sides of the annular grooved wheel 1, and the outer side of the annular grooved wheel 1 is wrapped by a belt guide wheel 5 with a belt 6;
  • the leading source block 30 passes through the groove 24 of the annular grooved wheel 1, and then comes out from the trailing source block 31 and the rear spiral duct 40 and enters the rear duct 3.
  • the radiation source 18 is driven by friction.
  • a radiation protection tank 16 is provided through which the front duct 4 passes, and a zigzag shape is formed in the radiation protection tank 16.
  • a photoelectric switch 15 is arranged on the photoelectric switch bracket 14.
  • a source-out limit micro-switch 8 is provided on the micro-switch holder 7.
  • a treatment catheter connector 17 is provided at the front end of the front catheter 4 so as to be connected with a pipe inserted into the human body.
  • a micro-movement switch 21, a sliding guide 23, and a sliding sleeve are provided at the end of the rear guide tube 3. 20.
  • Adjustable source-to-center limit device consisting of positioning bolt 19 and contact pin 22.
  • the central micro switch 21 is fixed on the sliding sleeve 20.
  • This device is also suitable for the case of multiple drive units.
  • the friction between the belt of the device and the radiation source is a fixed constant.
  • the friction can be adjusted very easily, and the adjustment is easy, and the operation of the radiation source is stable.
  • the loading and unloading source is extremely convenient.
  • the device is particularly suitable for driving a smaller after-installed radioactive source, making it easier to adjust and install and dismount the radioactive source, and the radioactive source will not generate a cumulative error or cause a source accident during operation.

Landscapes

  • 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)
  • Radiation-Therapy Devices (AREA)

Abstract

La présente invention concerne un dispositif de pignonnerie qui peut entraîner en toute sécurité la source de radiations d'une unité intracavitaire à distance après chargement, ce dispositif pouvant également faire tourner en souplesse le mécanisme de pignonnerie de la source. Etant donné que les très petites dimensions des deux intervalles, d'une part celui entre le bloc source à guide et la rainure de la came sur bague, et d'autre part celui entre la poulie guide de la courroie et le bloc source à guide, c'est très facile à assembler ou à ajuster. En outre, le bloc source à guide et la rainure de la came sur bague sont auto-adaptable dans l'opération, toutefois, c'est très pratique pour le chargement et déchargement de la source à radiations. Le dispositif continue de constituer les avantages de la demande de brevet chinois ZL98119833.3 de l'inventeur, et l'unité intracavitaire après chargement ne produit pas d'erreur d'accumulation dans l'opération que constitue l'entraînement de la source de radiations, et ne produit pas de phénomène dit de 'blocage de source', ce qui fait élève grandement la sécurité pour la thérapie après chargement.
PCT/CN2001/001629 2001-06-21 2001-12-14 Dispositif de guidage pour source de radiations montee sur l'arriere WO2003000342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01129300.4 2001-06-21
CN 01129300 CN1233430C (zh) 2001-06-21 2001-06-21 后装机放射源导出装置

Publications (1)

Publication Number Publication Date
WO2003000342A1 true WO2003000342A1 (fr) 2003-01-03

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ID=4669063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2001/001629 WO2003000342A1 (fr) 2001-06-21 2001-12-14 Dispositif de guidage pour source de radiations montee sur l'arriere

Country Status (2)

Country Link
CN (1) CN1233430C (fr)
WO (1) WO2003000342A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8096700B2 (en) 1999-11-24 2012-01-17 Impulse Devices Inc. Heat exchange system for a cavitation chamber
CN104511097A (zh) * 2014-12-22 2015-04-15 天津大学 高剂量率多通道后装治疗机分度头机构
CN107837465A (zh) * 2017-11-21 2018-03-27 西安大医数码科技有限公司 一种导源装置及系统
CN114053601A (zh) * 2021-11-12 2022-02-18 江苏海明医疗器械有限公司 一种后装放射治疗机用出源长度自校正装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105194805B (zh) * 2015-10-20 2018-03-20 江苏海明医疗器械有限公司 一种核素后装治疗机的放射源输送装置
NL2023918B1 (en) * 2019-09-30 2021-05-27 Nucletron Operations Bv Selector for Remotely Medical Device / Afterloading

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190602A (zh) * 1997-02-14 1998-08-19 王力平 后装机放射源运行累积误差校正装置
CN1248474A (zh) * 1998-09-18 2000-03-29 王力平 后装机放射源传动装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190602A (zh) * 1997-02-14 1998-08-19 王力平 后装机放射源运行累积误差校正装置
CN1248474A (zh) * 1998-09-18 2000-03-29 王力平 后装机放射源传动装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8096700B2 (en) 1999-11-24 2012-01-17 Impulse Devices Inc. Heat exchange system for a cavitation chamber
CN104511097A (zh) * 2014-12-22 2015-04-15 天津大学 高剂量率多通道后装治疗机分度头机构
CN104511097B (zh) * 2014-12-22 2017-07-07 天津大学 高剂量率多通道后装治疗机分度头机构
CN107837465A (zh) * 2017-11-21 2018-03-27 西安大医数码科技有限公司 一种导源装置及系统
CN107837465B (zh) * 2017-11-21 2024-05-14 西安大医集团股份有限公司 一种导源装置及系统
CN114053601A (zh) * 2021-11-12 2022-02-18 江苏海明医疗器械有限公司 一种后装放射治疗机用出源长度自校正装置
CN114053601B (zh) * 2021-11-12 2023-07-28 江苏海明医疗器械有限公司 一种后装放射治疗机用出源长度自校正装置

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Publication number Publication date
CN1322578A (zh) 2001-11-21
CN1233430C (zh) 2005-12-28

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