FR2172949B1 - - Google Patents

Info

Publication number
FR2172949B1
FR2172949B1 FR7232594A FR7232594A FR2172949B1 FR 2172949 B1 FR2172949 B1 FR 2172949B1 FR 7232594 A FR7232594 A FR 7232594A FR 7232594 A FR7232594 A FR 7232594A FR 2172949 B1 FR2172949 B1 FR 2172949B1
Authority
FR
France
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
FR7232594A
Other languages
French (fr)
Other versions
FR2172949A1 (de
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 Corp
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 Corp filed Critical Picker Corp
Publication of FR2172949A1 publication Critical patent/FR2172949A1/fr
Application granted granted Critical
Publication of FR2172949B1 publication Critical patent/FR2172949B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J35/066—Details of electron optical components, e.g. cathode cups
    • 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
FR7232594A 1972-02-24 1972-09-14 Expired FR2172949B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22913672A 1972-02-24 1972-02-24

Publications (2)

Publication Number Publication Date
FR2172949A1 FR2172949A1 (de) 1973-10-05
FR2172949B1 true FR2172949B1 (de) 1976-05-21

Family

ID=22859964

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7232594A Expired FR2172949B1 (de) 1972-02-24 1972-09-14

Country Status (6)

Country Link
US (1) US3783333A (de)
JP (1) JPS48100087A (de)
CA (1) CA959108A (de)
DE (1) DE2231970A1 (de)
FR (1) FR2172949B1 (de)
NL (1) NL7209611A (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104526A (en) * 1973-04-24 1978-08-01 Albert Richard D Grid-cathode controlled X-ray tube
DE3008304A1 (de) * 1980-03-04 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Roentgenroehre mit zwei kathodenwendeln
US4689809A (en) * 1982-11-23 1987-08-25 Elscint, Inc. X-ray tube having an adjustable focal spot
US4685118A (en) * 1983-11-10 1987-08-04 Picker International, Inc. X-ray tube electron beam switching and biasing method and apparatus
US4764947A (en) * 1985-12-04 1988-08-16 The Machlett Laboratories, Incorporated Cathode focusing arrangement
US5007074A (en) * 1989-07-25 1991-04-09 Picker International, Inc. X-ray tube anode focusing by low voltage bias
DE4230880A1 (de) * 1992-09-16 1994-03-17 Philips Patentverwaltung Röntgengenerator zur Speisung einer Röntgenröhre mit wenigstens zwei Elektronenquellen
US5511105A (en) * 1993-07-12 1996-04-23 Siemens Aktiengesellschaft X-ray tube with multiple differently sized focal spots and method for operating same
DE19504305A1 (de) * 1995-02-09 1996-08-14 Siemens Ag Röntgenröhre
US5844963A (en) * 1997-08-28 1998-12-01 Varian Associates, Inc. Electron beam superimposition method and apparatus
US6438207B1 (en) 1999-09-14 2002-08-20 Varian Medical Systems, Inc. X-ray tube having improved focal spot control
US7257194B2 (en) * 2004-02-09 2007-08-14 Varian Medical Systems Technologies, Inc. Cathode head with focal spot control
US9524845B2 (en) 2012-01-18 2016-12-20 Varian Medical Systems, Inc. X-ray tube cathode with magnetic electron beam steering
JP6638966B2 (ja) * 2016-06-20 2020-02-05 キヤノン電子管デバイス株式会社 Ｘ線管
JP6951027B2 (ja) * 2017-08-14 2021-10-20 キヤノン電子管デバイス株式会社 Ｘ線管

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB232159A (en) * 1924-04-11 1925-10-08 Huth Erich F Gmbh Improvements in and relating to thermionic tubes
US3018398A (en) * 1958-10-27 1962-01-23 Dunlee Corp X-ray generator
US3178578A (en) * 1961-03-03 1965-04-13 High Voltage Engineering Corp Electron pulser for an x-ray tube to produce a pulsed beam of x-rays
US3250916A (en) * 1963-06-14 1966-05-10 Machlett Lab Inc Stereo x-ray device
US3433955A (en) * 1966-09-26 1969-03-18 Picker Corp X-ray generator with emission control arrangement within the focusing cup
US3549931A (en) * 1968-12-04 1970-12-22 Torr Lab Inc X-ray transmissive window assembly
US3665236A (en) * 1970-12-09 1972-05-23 Atomic Energy Commission Electrode structure for controlling electron flow with high transmission efficiency
US3660712A (en) * 1970-12-09 1972-05-02 Atomic Energy Commission Electrode structure for controlling electron flow with high transmission efficiency

Also Published As

Publication number Publication date
CA959108A (en) 1974-12-10
FR2172949A1 (de) 1973-10-05
NL7209611A (de) 1973-08-28
DE2231970A1 (de) 1973-08-30
US3783333A (en) 1974-01-01
JPS48100087A (de) 1973-12-18

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Legal Events

Date Code Title Description
ST Notification of lapse