EP0182637A3 - X-ray tubes - Google Patents

X-ray tubes Download PDF

Info

Publication number
EP0182637A3
EP0182637A3 EP85308364A EP85308364A EP0182637A3 EP 0182637 A3 EP0182637 A3 EP 0182637A3 EP 85308364 A EP85308364 A EP 85308364A EP 85308364 A EP85308364 A EP 85308364A EP 0182637 A3 EP0182637 A3 EP 0182637A3
Authority
EP
European Patent Office
Prior art keywords
anode
spot
spot region
ray tubes
rotation
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.)
Withdrawn
Application number
EP85308364A
Other languages
German (de)
French (fr)
Other versions
EP0182637A2 (en
Inventor
Avery D. Furbee
Viktor W. Pleil
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 Nuclear Medicine Inc
Original Assignee
Picker International Inc
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 Picker International Inc filed Critical Picker International Inc
Publication of EP0182637A2 publication Critical patent/EP0182637A2/en
Publication of EP0182637A3 publication Critical patent/EP0182637A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/064—Details of the emitter, e.g. material or structure
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/06—Cathode assembly
    • H01J2235/068—Multi-cathode assembly

Abstract

An x-ray tube wherein two or more cathode filaments (30, 32) respectively provide the electrons for respective contigu­ ous portions (40a, 40b) of a single unitary anode spot region (40). An elongated spot region may thus be provided by multi­ ple short filaments which are more robust than a single filament required to produce such a spot. Where the anode (12) is a rotating anode, the filements (30, 32) may be differently ener­ gised to take account of the different speeds of anode rotation with distance from the axis (22) of anode rotation.
EP85308364A 1984-11-21 1985-11-18 X-ray tubes Withdrawn EP0182637A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67365784A 1984-11-21 1984-11-21
US673657 1984-11-21

Publications (2)

Publication Number Publication Date
EP0182637A2 EP0182637A2 (en) 1986-05-28
EP0182637A3 true EP0182637A3 (en) 1987-06-03

Family

ID=24703566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85308364A Withdrawn EP0182637A3 (en) 1984-11-21 1985-11-18 X-ray tubes

Country Status (2)

Country Link
EP (1) EP0182637A3 (en)
JP (1) JPS61179045A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671229B1 (en) * 1990-12-28 1993-03-19 Gen Electric Cgr METHOD, TUBE AND SYSTEM FOR ELIMINATING AN ANTI-DIFFUSING GRID FIXED IN A RADIOLOGICAL IMAGE.
JP2004265606A (en) * 2003-01-21 2004-09-24 Toshiba Corp X-ray tube device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452203A (en) * 1965-08-31 1969-06-24 Tokyo Shibaura Electric Co Triode type x-ray tubes and method and apparatus for irradiating x-rays
GB1214083A (en) * 1967-04-19 1970-12-02 Tokyo Shibaura Electric Co X-ray tubes
US3649861A (en) * 1970-09-09 1972-03-14 Picker Corp Double focus x-ray tube
US3946261A (en) * 1975-01-03 1976-03-23 The Machlett Laboratories, Inc. Dual filament X-Ray tube
US4065689A (en) * 1974-11-29 1977-12-27 Picker Corporation Dual filament X-ray tube
DE2850583A1 (en) * 1978-11-22 1980-06-04 Philips Patentverwaltung X=ray tube with separately switched heaters and screen - has aperture split by conducting strip and screen potential localising target area
US4315154A (en) * 1979-11-08 1982-02-09 Siemens Corporation Multiple focus X-ray generator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452203A (en) * 1965-08-31 1969-06-24 Tokyo Shibaura Electric Co Triode type x-ray tubes and method and apparatus for irradiating x-rays
GB1214083A (en) * 1967-04-19 1970-12-02 Tokyo Shibaura Electric Co X-ray tubes
US3649861A (en) * 1970-09-09 1972-03-14 Picker Corp Double focus x-ray tube
US4065689A (en) * 1974-11-29 1977-12-27 Picker Corporation Dual filament X-ray tube
US3946261A (en) * 1975-01-03 1976-03-23 The Machlett Laboratories, Inc. Dual filament X-Ray tube
DE2850583A1 (en) * 1978-11-22 1980-06-04 Philips Patentverwaltung X=ray tube with separately switched heaters and screen - has aperture split by conducting strip and screen potential localising target area
US4315154A (en) * 1979-11-08 1982-02-09 Siemens Corporation Multiple focus X-ray generator

Also Published As

Publication number Publication date
JPS61179045A (en) 1986-08-11
EP0182637A2 (en) 1986-05-28

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Inventor name: PLEIL, VIKTOR W.

Inventor name: FURBEE, AVERY D.