US3897345A - High strength low attenuation couch top - Google Patents
High strength low attenuation couch top Download PDFInfo
- Publication number
- US3897345A US3897345A US398348A US39834873A US3897345A US 3897345 A US3897345 A US 3897345A US 398348 A US398348 A US 398348A US 39834873 A US39834873 A US 39834873A US 3897345 A US3897345 A US 3897345A
- Authority
- US
- United States
- Prior art keywords
- stretcher
- rays
- skin
- diagnostic
- acrylic acid
- 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 - Lifetime
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
- A61B6/0442—Supports, e.g. tables or beds, for the body or parts of the body made of non-metallic materials
Definitions
- Beryllium sheet, wood and plastic sheet are all suitable, but beryllium is costly; wood and plastic structures of sufficient transparency tend to deflect excessively. These prior difficulties have been further magnified when the X-ray beam has been projected obliquely to the plane of the stretcher.
- the present invention provides a relatively low cost structure having a greatly enhanced strength to weight ratio and a lower transparency to X-rays. The latter feature resulting in lower radiation dose to the patient than previously possible.
- Prior known diagnostic stretchers have been made of a variety of materials, the most sophisticated of which have utilised a glass-fibre reinforced polyester shell around a polyurethane foam core.
- the attenuation of such stretches to X-rays of about 90 kvp has been found equivalent to about 3mm of aluminum.
- New regulations require diagnostic and therapy stretchers to have an attenuation not to exceed that obtained with 1mm of aluminum.
- the present invention makes use of graphite fibres, alone or in combination with organic fibres in a plastics resin matrix as a skin around a rigid polyurethane foam or other foamed plastics core to provide a sandwich constructed couch suitable for supporting patients for examination on a rotational therapy simulator and yet having a uniform transparency to X-rays in such a manner as to permit examination of the patient by the X-ray passing through the patient and the supporting structure while using reduced doses of X-rays.
- the invention in its broadest aspects comprises graphite or carbon fibres alone or in combination with organic fibres disposed in an epoxy matrix to form a skin around and bonded to a rigid polyurethane foam core thereby defining a sandwich construction.
- FIG. 1 is an isometric drawing, partially sectioned view of a diagnostic stretcher
- FIG. 2 is a base for receiving the stretcher shown in FIG. 1.
- the diagnostic stretcher is generally indicated at l and comprises an outer skin 10 formed of carbon (graphite) fibres alone or in combination with PRD-49 organic fibres manufactured by Dupont (Trademark).
- the fibres are formed in an epoxy matrix to form a skin around and bonded to a rigid polyurethane foam core 12 to provide a structure of sufficient thickness to support a patient in a cantilevered position and suitable for examination on a rotational therapy simulator yet possessing a relatively high and uniform transparency to X-rays so as to meet the attenuation requirements of the regulations.
- Integrally bonded to the bottom surface of tray 10 is a sheetlike rigid tray 13.
- Tray 13 extends longitudinally over only a minor portion of the stretcher 1 and slidably cooperates with a channel-shaped carrier 14 suitably mounted on the top surface 2" of the support base 2. While forming no part of the present invention, tray 13 may be slidably secured to carrier 14 by a plurality of mushroom head bolt members 15, or any other conventional fastening members.
- stretcher l is supported in cantilever fashion by base 2.
- the improved performance of the stretcher is the result of using highstrength, high-modulus fibres having relatively high transparency to X-rays and gamma rays which permit the using of less material to achieve the desired structural stiffness. As mentioned above, this results in a stretcher having X-ray attenuation less than that obtained by passing X-rays of about kvp through 1 mm of aluminum.
- the invention enables the construction of a couch of desirable cross-section (i.e. width, depth and shape) which benefits from three essential properties of fibres, that is, high-strength, high-modulus and high transparency to X-rays.
- the invention further provides for reduced attenuation to X-rays and gamma rays which is achieved by using less material to absorb such X-rays and gamma rays and by using a material which is more transparent to X-rays.
- a diagnostic stretcher substantially transparent to X-radiation, with an attenuation equivalent to less than 1 mm of aluminum when subject to X-rays of 90 kvp passed normal through the said stretcher, said stretcher comprising:
- an outer skin of carbon or graphite fibres in epoxy matrix said skin having a configuration of a long thin and substantially flat board suitable for receiving a patient thereon and for cantilevered mounting on a stand, and
Abstract
In the diagnosis of tumours and the like, particularly by means of X-ray radiographs and the gamma therapy of such afflicted patients'' difficulties have been encountered with prior known stretchers due to the excessive attenuation of the X-rays and the gamma ray because no suitable structural material of low cost has been discovered. Beryllium sheet, wood and plastic sheet are all suitable, but beryllium is costly; wood and plastic structures of sufficient transparency tend to deflect excessively. These prior difficulties have been further magnified when the X-ray beam has been projected obliquely to the plane of the stretcher. The present invention provides a relatively low cost structure having a greatly enhanced strength to weight ratio and a lower transparency to X-rays. The latter feature resulting in lower radiation dose to the patient than previously possible.
Description
United States Patent [1 1 Foster July 29, 1975 [75] Inventor: Melvin Lewis Foster, Ottawa,
Canada [73] Assignee: Atomic Energy of Canada Limited, Ottawa, Canada [22] Filed: Sept. 18, 1973 [21] App]. No.: 398,348
[30] Foreign Application Priority Data July 20, 1973 Canada 177017 [52] U.S. Cl 250/439; 250/456 [51] Int. Cl. G03b 41/16 [58] Field of Search 250/439, 444, 445, 446, 250/447, 448, 449, 450, 451, 456
[56] References Cited UNITED STATES PATENTS 3,157,787 11/1964 Kcndziorski, Jr. et al 250/481 3,449,570 6/1969 Kok 250/439 Primary Examiner-James W. Lawrence Assistant ExaminerC. E. Church Attorney, Agent, or FirmBrowne, Beveridge, DeGrandi & Kline [57] ABSTRACT In the diagnosis of tumours and the like, particularly by means of X-ray radiographs and the gamma therapy of such afflicted patients difficulties have been encountered with prior known stretchers due to the excessive attenuation of the X-rays and the gamma ray because no suitable structural material of low cost has been discovered. Beryllium sheet, wood and plastic sheet are all suitable, but beryllium is costly; wood and plastic structures of sufficient transparency tend to deflect excessively. These prior difficulties have been further magnified when the X-ray beam has been projected obliquely to the plane of the stretcher. The present invention provides a relatively low cost structure having a greatly enhanced strength to weight ratio and a lower transparency to X-rays. The latter feature resulting in lower radiation dose to the patient than previously possible.
2 Claims, 2 Drawing Figures HIGH STRENGTH LOW ATTENUATION COUCH TOP This invention relates to lightweight structures having low transparency to photons. The invention has particular, but not exclusive, utility when applied to diagnostic and therapy stretchers.
Prior known diagnostic stretchers have been made of a variety of materials, the most sophisticated of which have utilised a glass-fibre reinforced polyester shell around a polyurethane foam core. The attenuation of such stretches to X-rays of about 90 kvp has been found equivalent to about 3mm of aluminum. New regulations require diagnostic and therapy stretchers to have an attenuation not to exceed that obtained with 1mm of aluminum.
The present invention makes use of graphite fibres, alone or in combination with organic fibres in a plastics resin matrix as a skin around a rigid polyurethane foam or other foamed plastics core to provide a sandwich constructed couch suitable for supporting patients for examination on a rotational therapy simulator and yet having a uniform transparency to X-rays in such a manner as to permit examination of the patient by the X-ray passing through the patient and the supporting structure while using reduced doses of X-rays.
It is a feature of one object of the invention to provide a diagnostic or therapy stretcher which has high strength to weight ratio and high flexural rigidity.
It is a feature of another object of the invention to provide a diagnostic or therapy stretcher wherein the structure has a relatively high and uniform transparency to X-rays and gamma rays.
It is a feature of yet another object of the invention to provide a diagnostic or therapy stretcher which is particularly advantageous in enabling a beam of X-rays to be directed to the plane of the stretcher at an oblique angle without presenting a substantial variation in the transmission of X-rays.
In accordance with the aforementioned features the invention in its broadest aspects comprises graphite or carbon fibres alone or in combination with organic fibres disposed in an epoxy matrix to form a skin around and bonded to a rigid polyurethane foam core thereby defining a sandwich construction.
The invention will now be described with reference to the accompanying drawings wherein:
FIG. 1 is an isometric drawing, partially sectioned view of a diagnostic stretcher, and
FIG. 2 is a base for receiving the stretcher shown in FIG. 1.
Referring now to FIG. 1, the diagnostic stretcher is generally indicated at l and comprises an outer skin 10 formed of carbon (graphite) fibres alone or in combination with PRD-49 organic fibres manufactured by Dupont (Trademark). The fibres are formed in an epoxy matrix to form a skin around and bonded to a rigid polyurethane foam core 12 to provide a structure of sufficient thickness to support a patient in a cantilevered position and suitable for examination on a rotational therapy simulator yet possessing a relatively high and uniform transparency to X-rays so as to meet the attenuation requirements of the regulations. Integrally bonded to the bottom surface of tray 10 is a sheetlike rigid tray 13. Tray 13 extends longitudinally over only a minor portion of the stretcher 1 and slidably cooperates with a channel-shaped carrier 14 suitably mounted on the top surface 2" of the support base 2. While forming no part of the present invention, tray 13 may be slidably secured to carrier 14 by a plurality of mushroom head bolt members 15, or any other conventional fastening members. In any event, stretcher l is supported in cantilever fashion by base 2. The improved performance of the stretcher is the result of using highstrength, high-modulus fibres having relatively high transparency to X-rays and gamma rays which permit the using of less material to achieve the desired structural stiffness. As mentioned above, this results in a stretcher having X-ray attenuation less than that obtained by passing X-rays of about kvp through 1 mm of aluminum.
The invention enables the construction of a couch of desirable cross-section (i.e. width, depth and shape) which benefits from three essential properties of fibres, that is, high-strength, high-modulus and high transparency to X-rays. v
The invention further provides for reduced attenuation to X-rays and gamma rays which is achieved by using less material to absorb such X-rays and gamma rays and by using a material which is more transparent to X-rays.
Other embodiments of the invention falling within the terms of the appended claims will occur to those skilled in the art.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
l. A diagnostic stretcher, substantially transparent to X-radiation, with an attenuation equivalent to less than 1 mm of aluminum when subject to X-rays of 90 kvp passed normal through the said stretcher, said stretcher comprising:
i. an outer skin of carbon or graphite fibres in epoxy matrix, said skin having a configuration of a long thin and substantially flat board suitable for receiving a patient thereon and for cantilevered mounting on a stand, and
ii. a rigid polyurethane foam core within said skin,
said skin and core being bonded together.
2. A diagnostic stretcher in accordance with claim 1 wherein said outer skin additionally includes organic fibres.
Claims (3)
1. A PROCESS FOR THE PRODUCTION OF AN UNSATURATED ALIPHATIC
1. A DIAGNOSTIC STRETCHER SUBSTANTIALLY TRANSPARENT TO XCARBOXYLIC ACID OR THE GROUP CONSISTING OF ACRYLIC ACID AND RADIATION WITH AN ATTENUATION EQUIVALENT TO LESS THAN 1 MM OF METHACRYLIC ACID WHICH COMPRISES PASSING A MIXTURE OF AIR OR ALUMINUM WHEN SUBJECT TO X-RAYS OF 90 KVP PASSED NORMAL OTHER GAS CONTAINING MOLECULAR OXYGEN, STEAM, AND AN UNSATUTHROUGH THE SAID STRETCHER SAID STRETCHER COMPRISING: RATED ALIPHATIC ALDEHYDE OF THE GROUP CONSISTING OF ACROLEIN FOR I. AN OUTER SKIN OF CARBON OR GRAPHITE FIBRES IN EPOXY MATRIX, THE PRODUCTION OF ACRYLIC ACID, AND METHACROLEIN FOR THE PROSAID SKIN HAVING A CONFIGURATION OF A LONG THIN AND SUBDUCTION OF METHACRYLIC ACID, INTO CONTACT AT A TEMPERATURE STANTIALLY FLAT BOARD SUITABLE FOR RECEIVING A PATIENT BETWEEN 20* AND 350*C AND AT A PRESSURE BETWEEN ATOMTHEREON AND FOR CANTILEVERED MOUNTING ON A STAND AND SPHERIC AND A SUPERATOMOSPHERIC PRESSURE OF 3 ATMOSPHERES II. A RIGID POLYURETHANE FOAM CORE WITHIN SAID SKIN SAID SKIN WITH A CATALYST CONSISTING ESSENTIALLY OF OXIDES OR OXYGENAND CORE BEING BONDED TOGETHER. CONTAINING COMPOUNDS OF THE ELEMENTS ANTIMONY, MOLYBDENUM, VANADIUM, AND TUNGSTEN, SUPPORTED ON A CARRIER MATERIAL, THE ATOMIC RATIOS OF THE ELEMENTS OF THE CATALYST WITH RESPECT TO MOLYBDENUM BEING RESPECTIVELY BETWEN 1 : 12 AND 60 : 12 FOR ANTIMONY, BETWEEN 0.5 : 12 AND 25 : 12 AND 25 : 12 FOR VANADI UM, AND BETWEEN 0.1 : 12 AND 12 : 12 FOR TUNGSTEN, AND SUBSEQUENTLY RECOVERING THE ACRYLIC ACID OR METHACRYLIC ACID FROM THE RESULTING MIXTURE.
2. A diagnostic stretcher in accordance with claim 1 wherein said outer skin additionally includes organic fibres.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA177,017A CA985433A (en) | 1973-07-20 | 1973-07-20 | High strength low attenuation couch top |
Publications (1)
Publication Number | Publication Date |
---|---|
US3897345A true US3897345A (en) | 1975-07-29 |
Family
ID=4097366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US398348A Expired - Lifetime US3897345A (en) | 1973-07-20 | 1973-09-18 | High strength low attenuation couch top |
Country Status (5)
Country | Link |
---|---|
US (1) | US3897345A (en) |
JP (1) | JPS5421715B2 (en) |
CA (1) | CA985433A (en) |
DE (1) | DE2432525A1 (en) |
FR (1) | FR2237608B1 (en) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3947686A (en) * | 1974-04-25 | 1976-03-30 | The Babcock & Wilcox Co. | Graphite composite X-ray transparent patient support |
US4134019A (en) * | 1977-06-16 | 1979-01-09 | Hipoint Research, Inc. | Object support surface and method for X-ray examination |
US4145612A (en) * | 1977-08-31 | 1979-03-20 | The Babcock & Wilcox Company | X-ray patient support stretcher and method for fabrication |
US4146793A (en) * | 1972-07-27 | 1979-03-27 | Siemens Ag | X-ray devices using epoxy resins strengthened with carbonic fibrous material |
US4157474A (en) * | 1977-05-16 | 1979-06-05 | Hipoint Research, Inc. | X-ray film cassette |
US4161831A (en) * | 1977-09-28 | 1979-07-24 | Restle Donald J | Picture mounting and display |
US4163900A (en) * | 1977-08-17 | 1979-08-07 | Connecticut Research Institute, Inc. | Composite electron microscope grid suitable for energy dispersive X-ray analysis, process for producing the same and other micro-components |
US4167674A (en) * | 1977-06-16 | 1979-09-11 | Hipoint Research, Inc. | Photoreceptor plate cassette for use in automated x-ray image processing systems |
EP0017454A1 (en) * | 1979-04-02 | 1980-10-15 | Kabushiki Kaisha Toshiba | Patient supporting table top in medical examination and therapy apparatus |
US4252594A (en) * | 1977-08-31 | 1981-02-24 | The Babcock & Wilcox Company | X-ray patient support stretcher and method for fabrication |
US4262204A (en) * | 1979-09-24 | 1981-04-14 | General Electric Company | Patient cradle for computerized tomography apparatus |
US4698837A (en) * | 1985-03-11 | 1987-10-06 | Amatech Corporation | Armboard mounting assembly |
US4710948A (en) * | 1985-12-13 | 1987-12-01 | Atlantic Richfield Company | Geologic core holder with composite barrel |
US4926457A (en) * | 1988-01-29 | 1990-05-15 | Hill-Rom Company, Inc. | Radiolucent hospital bed surface |
US4956885A (en) * | 1988-10-03 | 1990-09-18 | U.S. Philips Corporation | Patient support for diagnostic apparatus |
US5040546A (en) * | 1989-12-21 | 1991-08-20 | Lunar Corporation | Patient positioning device and method |
US5425068A (en) * | 1992-05-05 | 1995-06-13 | Siemens Aktiengesellschaft | Medical apparatus support member for carrying a component |
EP1174087A3 (en) * | 2000-07-21 | 2003-08-27 | Siemens Medical Systems, Inc. | Tabletop for radiation therapy and diagnostic imaging |
US20050284490A1 (en) * | 2004-06-25 | 2005-12-29 | Moyers Michael F | Method and device for registration and immobilization |
WO2006032637A1 (en) * | 2004-09-22 | 2006-03-30 | Siemens Aktiengesellschaft | Patient table for a radiation therapy system or radiation diagnosis system |
EP1682062A2 (en) * | 2003-10-16 | 2006-07-26 | Calypso Medical Technologies, Inc. | Patient support systems for use with radiation therapy systems and other applications |
US20080042076A1 (en) * | 2003-08-12 | 2008-02-21 | Loma Linda University Medical Center | Modular patient support system |
US7789560B2 (en) | 2001-10-30 | 2010-09-07 | Loma Linda University Medical Center | Method and device for delivering radiotherapy |
US20100310054A1 (en) * | 2009-06-08 | 2010-12-09 | Oncolog Medical Qa Ab | Table top for radiation therapy |
WO2011001174A1 (en) * | 2009-06-30 | 2011-01-06 | Omnia (Cs) Limited | Table having a central cellular honeycomb structure thermally fused in a sandwich configuration between two fibre-reinforced polypropylene face sheets |
US8210899B2 (en) | 2006-11-21 | 2012-07-03 | Loma Linda University Medical Center | Device and method for immobilizing patients for breast radiation therapy |
CN102551774A (en) * | 2010-12-20 | 2012-07-11 | Ge医疗系统环球技术有限公司 | Belt type bed, computed tomography (CT) equipment and calibration data obtaining method for CT equipment |
CN108614303A (en) * | 2018-07-12 | 2018-10-02 | 同方威视技术股份有限公司 | The shielding construction of Security Inspection Equipments and safety inspection channel |
US10555707B2 (en) | 2016-11-22 | 2020-02-11 | General Electric Compamny | Patient support system and method for medical imaging |
US20220142593A1 (en) * | 2019-02-25 | 2022-05-12 | Medibord Limited | Composite |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1578754A (en) * | 1976-03-25 | 1980-11-12 | Emi Ltd | Patient positioning and supporting arrangement |
JPS565504U (en) * | 1979-06-25 | 1981-01-19 | ||
JPS565505U (en) * | 1979-06-25 | 1981-01-19 | ||
DE3031841A1 (en) * | 1979-08-29 | 1981-03-19 | Fothergill & Harvey Ltd., Littleborough, Lancashire | OPERATING TABLE |
JPS5731843A (en) * | 1980-08-01 | 1982-02-20 | Marushiyou Sangyo Kk | Stretcher for diagnosis |
JPS5898902U (en) * | 1981-12-28 | 1983-07-05 | 株式会社日立メデイコ | CT machine bed top plate |
JPS5987805U (en) * | 1982-12-02 | 1984-06-14 | 横河メディカルシステム株式会社 | Table for tomography equipment |
DE8411550U1 (en) * | 1984-04-12 | 1984-06-20 | Siemens AG, 1000 Berlin und 8000 München | Diagnostic device for the generation of slice images of a subject |
US4893323A (en) * | 1988-07-19 | 1990-01-09 | Cook Iii Charles F | Combination portable x-ray table and stretcher |
DE4214858C1 (en) * | 1992-05-05 | 1994-02-10 | Siemens Ag | X-ray component support and carrier system including guide rails - has members of fibre reinforced plastics for low weight and rigidity and resistant to oscillations |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US3157787A (en) * | 1962-09-05 | 1964-11-17 | Gen Electric | Lightweight rigid radiographic film cassette |
US3449570A (en) * | 1965-10-22 | 1969-06-10 | Philips Corp | X-ray table having a plurality of pairs of slings with oppositely windable members |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5121401B2 (en) * | 1972-02-15 | 1976-07-02 | ||
DE2236942B2 (en) * | 1972-07-27 | 1974-12-19 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Use of casting resins reinforced with carbon fiber material |
-
1973
- 1973-07-20 CA CA177,017A patent/CA985433A/en not_active Expired
- 1973-09-18 US US398348A patent/US3897345A/en not_active Expired - Lifetime
-
1974
- 1974-07-04 DE DE2432525A patent/DE2432525A1/en active Pending
- 1974-07-15 FR FR7424517A patent/FR2237608B1/fr not_active Expired
- 1974-07-16 JP JP8160274A patent/JPS5421715B2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157787A (en) * | 1962-09-05 | 1964-11-17 | Gen Electric | Lightweight rigid radiographic film cassette |
US3449570A (en) * | 1965-10-22 | 1969-06-10 | Philips Corp | X-ray table having a plurality of pairs of slings with oppositely windable members |
Cited By (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4146793A (en) * | 1972-07-27 | 1979-03-27 | Siemens Ag | X-ray devices using epoxy resins strengthened with carbonic fibrous material |
US3947686A (en) * | 1974-04-25 | 1976-03-30 | The Babcock & Wilcox Co. | Graphite composite X-ray transparent patient support |
US4157474A (en) * | 1977-05-16 | 1979-06-05 | Hipoint Research, Inc. | X-ray film cassette |
US4134019A (en) * | 1977-06-16 | 1979-01-09 | Hipoint Research, Inc. | Object support surface and method for X-ray examination |
US4167674A (en) * | 1977-06-16 | 1979-09-11 | Hipoint Research, Inc. | Photoreceptor plate cassette for use in automated x-ray image processing systems |
US4163900A (en) * | 1977-08-17 | 1979-08-07 | Connecticut Research Institute, Inc. | Composite electron microscope grid suitable for energy dispersive X-ray analysis, process for producing the same and other micro-components |
US4145612A (en) * | 1977-08-31 | 1979-03-20 | The Babcock & Wilcox Company | X-ray patient support stretcher and method for fabrication |
US4252594A (en) * | 1977-08-31 | 1981-02-24 | The Babcock & Wilcox Company | X-ray patient support stretcher and method for fabrication |
US4161831A (en) * | 1977-09-28 | 1979-07-24 | Restle Donald J | Picture mounting and display |
US4312912A (en) * | 1979-04-02 | 1982-01-26 | Tokyo Shibaura Denki Kabushiki Kaisha | Patient supporting table top in medical examination and therapy apparatus |
EP0017454A1 (en) * | 1979-04-02 | 1980-10-15 | Kabushiki Kaisha Toshiba | Patient supporting table top in medical examination and therapy apparatus |
US4262204A (en) * | 1979-09-24 | 1981-04-14 | General Electric Company | Patient cradle for computerized tomography apparatus |
US4698837A (en) * | 1985-03-11 | 1987-10-06 | Amatech Corporation | Armboard mounting assembly |
US4710948A (en) * | 1985-12-13 | 1987-12-01 | Atlantic Richfield Company | Geologic core holder with composite barrel |
US4926457A (en) * | 1988-01-29 | 1990-05-15 | Hill-Rom Company, Inc. | Radiolucent hospital bed surface |
US4956885A (en) * | 1988-10-03 | 1990-09-18 | U.S. Philips Corporation | Patient support for diagnostic apparatus |
US5040546A (en) * | 1989-12-21 | 1991-08-20 | Lunar Corporation | Patient positioning device and method |
US5425068A (en) * | 1992-05-05 | 1995-06-13 | Siemens Aktiengesellschaft | Medical apparatus support member for carrying a component |
EP1174087A3 (en) * | 2000-07-21 | 2003-08-27 | Siemens Medical Systems, Inc. | Tabletop for radiation therapy and diagnostic imaging |
US6904630B2 (en) | 2000-07-21 | 2005-06-14 | Siemens Medical Solutions Usa, Inc. | Tabletop for radiation therapy and diagnostic imaging |
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US8981324B2 (en) | 2003-08-12 | 2015-03-17 | Loma Linda University Medical Center | Patient alignment system with external measurement and object coordination for radiation therapy system |
US20110218679A1 (en) * | 2003-08-12 | 2011-09-08 | Loma Linda University Medical Center | Path planning and collision avoidance for movement of instruments in a radiation therapy environment |
US8269195B2 (en) | 2003-08-12 | 2012-09-18 | Loma Linda University Medical Center | Patient alignment system with external measurement and object coordination for radiation therapy system |
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US7753587B2 (en) | 2004-09-22 | 2010-07-13 | Siemens Aktiengesellschaft | Patient table for a radiation therapy system or a radiation diagnosis system |
DE112005002108B4 (en) * | 2004-09-22 | 2017-03-09 | Siemens Healthcare Gmbh | Patient table for a radiotherapy or radiation diagnostic system |
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US20080013693A1 (en) * | 2004-09-22 | 2008-01-17 | Jochen Kusch | Patient Table for a Radiation Therapy System or a Radiation Diagnosis System |
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Also Published As
Publication number | Publication date |
---|---|
CA985433A (en) | 1976-03-09 |
FR2237608A1 (en) | 1975-02-14 |
JPS50152685A (en) | 1975-12-08 |
JPS5421715B2 (en) | 1979-08-01 |
DE2432525A1 (en) | 1975-02-06 |
FR2237608B1 (en) | 1978-09-15 |
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