GB1083402A - Improvements in or relating to collimators for radiotherapy equipment - Google Patents

Improvements in or relating to collimators for radiotherapy equipment

Info

Publication number
GB1083402A
GB1083402A GB1657665A GB1657665A GB1083402A GB 1083402 A GB1083402 A GB 1083402A GB 1657665 A GB1657665 A GB 1657665A GB 1657665 A GB1657665 A GB 1657665A GB 1083402 A GB1083402 A GB 1083402A
Authority
GB
United Kingdom
Prior art keywords
collimator
members
limbs
shafts
frame
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
Application number
GB1657665A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1083402A publication Critical patent/GB1083402A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/04—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers

Abstract

1,083,402. Collimator. A. SHEWCHENKO. April 20, 1965 [Jan. 6, 1965], No. 16576/65. Heading H5R. An adjustable collimator to define the area of the beam incident on a patient in radiotherapy, comprises four longitudinal members 1-4, spaced equally around a central longitudinal axis, each member 1-4, having spaced along it a number of transverse limbs (e.g. 12, 14, 16, 18), the gaps between limbs on one member 1-4, being occupied by the limbs on an adjacent member. At the end of the collimator adjacent a radio-active source (105, Fig. 5, not shown), the members 1-4 have hinge brackets, e.g. (21, Figs. 3, 4, not shown), by which they are hinged to an annular member (102) to which is attached the collimator frame or casing (100). The collimator may rotate as a about its own axis by virtue of a flange (110) at the end of the frame (100) away from the source, being mounted on ball-bearings in a unit ring (112) attached to the radiotherapy unit. An outer casing (106) and back plate (103) similarly form part of this unit. Adjustment of the collimator members 1-4 to cause them to pivot out or inwardly, with respect to the central axis, on the hinges, is through two drive shafts (150, 160) the former controlling the side members, the latter the top and bottom members. The front ends of members 1-4 carry guide brackets (19, 29 &c.) on which are mounted rollers (170) on shafts (171). Associated with the collimator frame (100) is a housing in which the drive shafts (150, 160) are accommodated and also annular cam members (130, 135) which are rotatable by the shafts (150, 160) respectively. The cam members each carry two opposed cam track arms (134, 136) in which the rollers (170) are forced to move when the cam members rotate, thus carrying the limbs 1-4 into the positions required. The material used for the collimator, in order to absorb γ-radiation, may be uranium, tungsten, lead, iron &c. A feature of the shape of the transverse limbs of the collimator is that they are formed as segments of individual annuli, based on the same centre of curvature.
GB1657665A 1965-01-06 1965-04-20 Improvements in or relating to collimators for radiotherapy equipment Expired GB1083402A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA920130 1965-01-06

Publications (1)

Publication Number Publication Date
GB1083402A true GB1083402A (en) 1967-09-13

Family

ID=4142156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1657665A Expired GB1083402A (en) 1965-01-06 1965-04-20 Improvements in or relating to collimators for radiotherapy equipment

Country Status (2)

Country Link
DE (1) DE1514451B1 (en)
GB (1) GB1083402A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530663A1 (en) * 1974-07-11 1976-01-29 Machlett Lab Inc DEVICE FOR THE LIMITATION OF A HIGH ENERGY BEAM, IN PARTICULAR AN X-RAY BEAM
US4598208A (en) * 1982-10-04 1986-07-01 Varian Associates, Inc. Collimation system for electron arc therapy
DE3050420C2 (en) * 1980-05-30 1989-07-20 Ivanov, Andrej Sergeevic
EP0751532A1 (en) * 1995-06-30 1997-01-02 Siemens Medical Systems, Inc. A multiple layer multileaf collimator
EP1367604A1 (en) * 2002-05-31 2003-12-03 Euratom A micro beam collimator having an iris like capillary for compressing beams
DE202005019260U1 (en) * 2005-12-09 2007-04-19 RUHR-UNIVERSITäT BOCHUM Ionised emission microscope for medical specimen diagnosis emits alpha beta gamma an X rays through a lens to provide collimated beam
US8152622B2 (en) 2008-03-11 2012-04-10 Aristocrat Technologies Australia Pty Limited Gaming system and method having controllably rotatable directing devices for use with a marker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959680A (en) * 1956-03-28 1960-11-08 Picker X Ray Corp Adjustable collimator for radiation therapy
GB867240A (en) * 1958-04-23 1961-05-03 Ass Elect Ind Improvements relating to beam defining apparatus
GB912084A (en) * 1960-02-08 1962-12-05 Aviat Electric Ltd Collimator for high energy radiation beams

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530663A1 (en) * 1974-07-11 1976-01-29 Machlett Lab Inc DEVICE FOR THE LIMITATION OF A HIGH ENERGY BEAM, IN PARTICULAR AN X-RAY BEAM
DE3050420C2 (en) * 1980-05-30 1989-07-20 Ivanov, Andrej Sergeevic
US4598208A (en) * 1982-10-04 1986-07-01 Varian Associates, Inc. Collimation system for electron arc therapy
EP0751532A1 (en) * 1995-06-30 1997-01-02 Siemens Medical Systems, Inc. A multiple layer multileaf collimator
CN1063979C (en) * 1995-06-30 2001-04-04 西门子医疗系统公司 Multi-layer multi-shutter aligner
EP1367604A1 (en) * 2002-05-31 2003-12-03 Euratom A micro beam collimator having an iris like capillary for compressing beams
WO2003102533A2 (en) * 2002-05-31 2003-12-11 Euratom A micro beam collimator having an iris like capillary for compressing beams
WO2003102533A3 (en) * 2002-05-31 2004-03-25 Euratom A micro beam collimator having an iris like capillary for compressing beams
US7109506B2 (en) 2002-05-31 2006-09-19 Euratom Micro beam collimator having an iris like capillary for compressing beams
DE202005019260U1 (en) * 2005-12-09 2007-04-19 RUHR-UNIVERSITäT BOCHUM Ionised emission microscope for medical specimen diagnosis emits alpha beta gamma an X rays through a lens to provide collimated beam
US8152622B2 (en) 2008-03-11 2012-04-10 Aristocrat Technologies Australia Pty Limited Gaming system and method having controllably rotatable directing devices for use with a marker
US8784179B2 (en) 2008-03-11 2014-07-22 Aristocrat Technologies Australia Pty Limited Gaming system and method having controllably rotatable directing devices for use with a marker

Also Published As

Publication number Publication date
DE1514451B1 (en) 1970-04-16

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