FR2406890A1 - Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons x - Google Patents
Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons xInfo
- Publication number
- FR2406890A1 FR2406890A1 FR7731743A FR7731743A FR2406890A1 FR 2406890 A1 FR2406890 A1 FR 2406890A1 FR 7731743 A FR7731743 A FR 7731743A FR 7731743 A FR7731743 A FR 7731743A FR 2406890 A1 FR2406890 A1 FR 2406890A1
- Authority
- FR
- France
- Prior art keywords
- definition
- improving
- ray tube
- fireplaces
- radiological
- 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.)
- Granted
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
- H01J35/147—Spot size control
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- X-Ray Techniques (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
L'invention concerne un procédé et un dispositif pour améliorer la définition des foyers des tubes à rayons X. Le procédé est caractérisé en ce qu'on module la tension de polarisation appliquée à la pièce de concentration du faisceau d'électrons émis par le filament du tube, d'une valeur minimale à une valeur maximale à une fréquence de modulation compatible avec la durée de fonctionnement du tube à rayons X.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7731743A FR2406890A1 (fr) | 1977-10-21 | 1977-10-21 | Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons x |
DE7878400121T DE2860563D1 (en) | 1977-10-21 | 1978-09-29 | Process and device for improving the radiological definition of a radiodiagnostic system |
EP78400121A EP0001729B1 (fr) | 1977-10-21 | 1978-09-29 | Procédé et dispositif pour améliorer la définition radiologique d'un système de radiodiagnostic |
IT28853/78A IT1159940B (it) | 1977-10-21 | 1978-10-18 | Procedimento e dispositivo per migliorare la definizione radiologica dei fuochi dei tubi a raggi x |
US05/952,352 US4213048A (en) | 1977-10-21 | 1978-10-18 | Method and circuit arrangement for improving the radiological definition of the focal spots of X-ray tubes |
JP12902478A JPS5484988A (en) | 1977-10-21 | 1978-10-19 | Radioactive xxray tube focus defining method and device |
CA000313778A CA1118115A (fr) | 1977-10-21 | 1978-10-19 | Procede et dispositif pour ameliorer la definition radiologique d'un systeme de radiodiagnostic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7731743A FR2406890A1 (fr) | 1977-10-21 | 1977-10-21 | Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons x |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2406890A1 true FR2406890A1 (fr) | 1979-05-18 |
FR2406890B1 FR2406890B1 (fr) | 1980-09-12 |
Family
ID=9196804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7731743A Granted FR2406890A1 (fr) | 1977-10-21 | 1977-10-21 | Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons x |
Country Status (7)
Country | Link |
---|---|
US (1) | US4213048A (fr) |
EP (1) | EP0001729B1 (fr) |
JP (1) | JPS5484988A (fr) |
CA (1) | CA1118115A (fr) |
DE (1) | DE2860563D1 (fr) |
FR (1) | FR2406890A1 (fr) |
IT (1) | IT1159940B (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5968200A (ja) * | 1982-10-08 | 1984-04-18 | Yokogawa Hokushin Electric Corp | X線ct装置 |
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 |
FR2687505B1 (fr) * | 1992-02-13 | 1994-04-08 | General Electric Cgr | Circuit de chauffage de filaments de cathode d'un tube a rayons x. |
US5535254A (en) * | 1995-05-17 | 1996-07-09 | Carlson; Todd R. | X-ray tube with self-biasing deck |
DE20218138U1 (de) * | 2002-11-21 | 2004-04-08 | Heuft Systemtechnik Gmbh | Röntgenanlage zur Erzeugung von kurzen Röntgenstrahlenimpulsen und mit einer solchen Röntgenanlage arbeitende Inspektionsvorrichtung |
US8401151B2 (en) * | 2009-12-16 | 2013-03-19 | General Electric Company | X-ray tube for microsecond X-ray intensity switching |
US9224572B2 (en) | 2012-12-18 | 2015-12-29 | General Electric Company | X-ray tube with adjustable electron beam |
US9484179B2 (en) | 2012-12-18 | 2016-11-01 | General Electric Company | X-ray tube with adjustable intensity profile |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2862107A (en) * | 1951-04-06 | 1958-11-25 | Gen Electric | Means for and method of controlling the generation of x-rays |
US3691417A (en) * | 1969-09-02 | 1972-09-12 | Watkins Johnson Co | X-ray generating assembly and system |
US3743836A (en) * | 1972-02-22 | 1973-07-03 | Machlett Lab Inc | X-ray focal spot control system |
US3992633A (en) * | 1973-09-04 | 1976-11-16 | The Machlett Laboratories, Incorporated | Broad aperture X-ray generator |
-
1977
- 1977-10-21 FR FR7731743A patent/FR2406890A1/fr active Granted
-
1978
- 1978-09-29 EP EP78400121A patent/EP0001729B1/fr not_active Expired
- 1978-09-29 DE DE7878400121T patent/DE2860563D1/de not_active Expired
- 1978-10-18 IT IT28853/78A patent/IT1159940B/it active
- 1978-10-18 US US05/952,352 patent/US4213048A/en not_active Expired - Lifetime
- 1978-10-19 JP JP12902478A patent/JPS5484988A/ja active Pending
- 1978-10-19 CA CA000313778A patent/CA1118115A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT7828853A0 (it) | 1978-10-18 |
JPS5484988A (en) | 1979-07-06 |
FR2406890B1 (fr) | 1980-09-12 |
CA1118115A (fr) | 1982-02-09 |
EP0001729A3 (en) | 1979-08-08 |
US4213048A (en) | 1980-07-15 |
EP0001729A2 (fr) | 1979-05-02 |
EP0001729B1 (fr) | 1981-03-25 |
IT1159940B (it) | 1987-03-04 |
DE2860563D1 (en) | 1981-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2406890A1 (fr) | Procede et dispositif pour ameliorer la definition radiologique des foyers des tubes a rayons x | |
FR2415876A1 (fr) | Tube a rayons x, notamment pour tomodensitometre | |
FR2418596A1 (fr) | Procede et systeme pour la diffusion des couleurs utilisant les composantes trichromatiques | |
FR2385374A1 (fr) | Appareil de radiodiagnostic pour la realisation de tomographies transversales | |
Radoń et al. | Photo field-emission spectroscopy of optical transitions in the band structure of tungsten | |
ES8405196A1 (es) | Un tubo de imagen en color | |
FR2506103A1 (fr) | Installation de radiodiagnostic | |
CA1048169A (fr) | Codage pour radiographie | |
JPS5542185A (en) | Detecting device for arc welding or the like | |
FR2380556A1 (fr) | Procede et appareillage de controle de circuits electroniques par faisceau d'electrons | |
GB1517475A (en) | X-ray intensification and minification system | |
GB1244027A (en) | Improvements in or relating to electron microscopes | |
FR2371061A1 (fr) | Procede pour representer l'image de diffraction dans un microscope a balayage a transmission, a faisceau corpusculaire | |
GB1446835A (en) | Light exposing apparatus for forming a phosphor screen of a cathode ray tube | |
JPS5760658A (en) | Cathode ray tube for light source | |
FR2469834A1 (fr) | Circuit destine a produire une tension de dents de scie, notamment par tube cathodique, et application a un appareil d'examen par ultrasons | |
WO1979000281A1 (fr) | Instrument a courant d'atomes | |
JPS52149965A (en) | Signal feedback type color cathode ray tube | |
JPS5627640A (en) | Method for evaluating oxide film | |
FR2360984A1 (fr) | Procede de fabrication d'une structure d'ecran d'un tube a rayons cathodiques | |
FR2381427A1 (fr) | Systeme et procede pour ajuster une information video a une deviation de faisceau electronique | |
JPS57143251A (en) | Electron beam apparatus | |
GB8306806D0 (en) | Emitter-receiver laser device | |
SE9400723L (sv) | Förfarande och anordning för styrning av vandringsvågrör | |
SU714543A1 (ru) | Осциллографическое устройство |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |