GB1357395A - Adjusting the size of the focal spot of an x-ray tube in accordance with the tube loading - Google Patents

Adjusting the size of the focal spot of an x-ray tube in accordance with the tube loading

Info

Publication number
GB1357395A
GB1357395A GB5016671A GB5016671A GB1357395A GB 1357395 A GB1357395 A GB 1357395A GB 5016671 A GB5016671 A GB 5016671A GB 5016671 A GB5016671 A GB 5016671A GB 1357395 A GB1357395 A GB 1357395A
Authority
GB
United Kingdom
Prior art keywords
tube
voltage
tap
electrode
accordance
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
GB5016671A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1357395A publication Critical patent/GB1357395A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/52—Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Abstract

1357395 X-ray tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 28 Oct 1971 [31 Oct 1970] 50166/71 Heading H2H The size of the focal spot in an X-ray tube 9 is adjusted in accordance with the tube loading by means of a supplementary electrode 11 which is connected to a movable tap 7 on a control transformer 2b, 2a coupled to the tube anode and cathode, means being provided for varying the tap position in accordance with variations in the tube loading. In a tube 9 with an extra electrode 11, which may be constructed as specified in patents 478,926 or 839,945, the spot size is proportional to the ratio (voltage between cathode and electrode/voltage between anode and electrode) which is varied by adjustment of the tap 7 linking the transformer 2a, 2b to a high voltage transformer 4a, 4b. If the apparatus is such that the tube current and voltage are independently adjustable then the tap 7 can be arranged to be controlled by a voltage which is the sum of the voltages from two logarithmic potentiometers (one for voltage and one for current) so that the tap position is proportional to the logarithm of the power. In the case where, as shown, the tube voltage reamins constant as the current varies, then a control knob 10 for varying the current is mechanically linked to means for moving the tap.
GB5016671A 1970-10-31 1971-10-28 Adjusting the size of the focal spot of an x-ray tube in accordance with the tube loading Expired GB1357395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702053606 DE2053606A1 (en) 1970-10-31 1970-10-31 Device for automatic adjustment of the focal spot size of an X-ray tube depending on the tube load

Publications (1)

Publication Number Publication Date
GB1357395A true GB1357395A (en) 1974-06-19

Family

ID=5786795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5016671A Expired GB1357395A (en) 1970-10-31 1971-10-28 Adjusting the size of the focal spot of an x-ray tube in accordance with the tube loading

Country Status (4)

Country Link
DE (1) DE2053606A1 (en)
FR (1) FR2113346A5 (en)
GB (1) GB1357395A (en)
IT (1) IT940070B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123038A (en) * 1989-09-08 1992-06-16 U.S. Philips Corporation X-ray generator for operating an x-ray tube with parts of the tube connected to mass
US5517545A (en) * 1993-07-15 1996-05-14 Hamamatsu Photonics K.K. X-ray apparatus
WO2010128416A2 (en) 2009-05-05 2010-11-11 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
WO2016045905A1 (en) * 2014-09-26 2016-03-31 Nikon Metrology Nv High voltage generator
CN110049610A (en) * 2019-04-24 2019-07-23 上海联影医疗科技有限公司 Control method, device, equipment and the storage medium of focus size
US10645788B2 (en) 2014-03-27 2020-05-05 Nikon Corporation X-ray generation device, X-ray device, and method for manufacturing structure

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025107A1 (en) * 1980-07-02 1982-01-14 Siemens AG, 1000 Berlin und 8000 München X-RAY DIAGNOSTIC DEVICE FOR RECORDING AND SCANNING
US4334153A (en) * 1980-09-29 1982-06-08 General Electric Company X-Ray tube grid bias supply
DE3043632A1 (en) * 1980-11-19 1982-07-08 Philips Patentverwaltung Gmbh, 2000 Hamburg X-RAY GENERATOR FOR SUPPLYING A X-RAY TUBE WITH A MEDIUM CONNECTED TO ITEM BETWEEN ITS ANODE AND CATHODE
DE3135061A1 (en) * 1981-09-04 1983-03-24 Philips Patentverwaltung Gmbh, 2000 Hamburg X-RAY GENERATOR FOR THE OPERATION OF X-RAY TUBES WITH A MEANS CONNECTED TO GROUND
JPS5894800A (en) * 1981-11-30 1983-06-06 Toshiba Corp X-ray control device
DE3218535A1 (en) * 1982-05-17 1983-11-17 Philips Patentverwaltung HIGH VOLTAGE GENERATOR, ESPECIALLY FOR THE SUPPLY OF A X-RAY TUBE
DE3303150A1 (en) * 1983-01-31 1984-08-02 Siemens AG, 1000 Berlin und 8000 München X-Ray diagnosis installation having adjusting means for the dose power of the X-ray tube

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123038A (en) * 1989-09-08 1992-06-16 U.S. Philips Corporation X-ray generator for operating an x-ray tube with parts of the tube connected to mass
US5517545A (en) * 1993-07-15 1996-05-14 Hamamatsu Photonics K.K. X-ray apparatus
WO2010128416A2 (en) 2009-05-05 2010-11-11 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
WO2010128416A3 (en) * 2009-05-05 2011-01-06 Koninklijke Philips Electronics N.V. Method and device for load dependent resizing of a focal spot of an x-ray generating device
US8958530B2 (en) 2009-05-05 2015-02-17 Koninklijke Philips N.V. Method and device for load dependent resizing of a focal spot of an X-ray generating device
US10645788B2 (en) 2014-03-27 2020-05-05 Nikon Corporation X-ray generation device, X-ray device, and method for manufacturing structure
JP2017535916A (en) * 2014-09-26 2017-11-30 ニコン・メトロロジー・エヌヴェ High voltage generator
WO2016045905A1 (en) * 2014-09-26 2016-03-31 Nikon Metrology Nv High voltage generator
US10856398B2 (en) 2014-09-26 2020-12-01 Nikon Metrology Nv High voltage generator
CN110049610A (en) * 2019-04-24 2019-07-23 上海联影医疗科技有限公司 Control method, device, equipment and the storage medium of focus size
CN110049610B (en) * 2019-04-24 2021-01-22 上海联影医疗科技股份有限公司 Method, device and equipment for controlling focus size and storage medium
US11246208B2 (en) 2019-04-24 2022-02-08 Shanghai United Imaging Healthcare Co., Ltd. Systems and methods for focus control in x-rays
US11974383B2 (en) 2019-04-24 2024-04-30 Shanghai United Imaging Healthcare Co., Ltd. Systems and methods for focus control in X-rays

Also Published As

Publication number Publication date
FR2113346A5 (en) 1972-06-23
DE2053606A1 (en) 1972-05-10
IT940070B (en) 1973-02-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee