US2853619A - Image amplifier phototimer - Google Patents

Image amplifier phototimer Download PDF

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Publication number
US2853619A
US2853619A US242141A US24214151A US2853619A US 2853619 A US2853619 A US 2853619A US 242141 A US242141 A US 242141A US 24214151 A US24214151 A US 24214151A US 2853619 A US2853619 A US 2853619A
Authority
US
United States
Prior art keywords
image
source
relay
screen
electron
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
Application number
US242141A
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English (en)
Inventor
Witt Benjamin 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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric 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
Priority to BE513475D priority Critical patent/BE513475A/fr
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US242141A priority patent/US2853619A/en
Priority to GB16088/52A priority patent/GB706671A/en
Priority to FR1081108D priority patent/FR1081108A/fr
Application granted granted Critical
Publication of US2853619A publication Critical patent/US2853619A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05G1/38—Exposure time
    • H05G1/42—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
    • H05G1/44—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube in which the switching instant is determined by measuring the amount of radiation directly

Definitions

  • the .durationz and intensity of gthe X-raybeam are limited toundesirably low values in rnedical .work bythe harmful effects of too great exposure of: the patient to the rays.
  • the use of other types ofpenetr-ating radiation than X-rays, for example, beams .ofneutronsQis also,slowlycoming ,into practice, nd is ,subject to similar limitations due to exposure danger. It is .accordingly necessary to provide for terminating the irradiating beam after a predetermined amount of exposure to to the radiation. This can be done automatically in the case of apparatus employing imageintensifiers since'the number of electrons which has been emitted from the. photo-electric screen is directly proportional to the numher of roentgensofX-rays to which the patient has been exposed atlanytime.
  • Onev object of my invention is accordingly to provide animprovedsXqay apparatusin which a; great increasei's attainedjn the brightnessof a-fluorescent image while at thetsarne time thedosage of, X-rays to which the pa.-. tient is exposed is terminated at a desired value.
  • Another object is' tosprovideianzimproved image, intensifier apparatuspwhich; automatically; intensifies the;brightness: of' f the image 1on v a; fluorescent screen and; at the; same time controls theyag rh'sy. -producev nsthe mage; H'-i CQI:dfi 1 Q:Wifl1; hei ime-integ ch intensity.
  • Another object is; to -.p r;ovidet an arrangementin which visible pictures. are; generatedq by; penetrating; radiationz and imwhich the sourcegof -radiation is ,CQHtIOllGdwlILfiOl'f respondence; ith thettime interval of-theradiation which:
  • f has:at nvn ns a tt. e e:ateclthevpict rer.
  • the illbfigzi is highly evacuated and; mayt betprovidedin the space between screens 3 and 4 Witha suitable-relocatronzlens 1 system described in .more; detailgin the above mentioned :patent...
  • an image intensifier including a fluorescent screen responsive to said X-ray image, a photoelectric screen member positioned adjacent said fluorescent screen to produce a space distributed electron image having the pattern of said X-ray image, and an electron-phosphor screen member spaced from said photoelectric screen member for receiving said electron image to produce an intensified visible light image, and an electric circuit connected to one of said members for controlling said source to limit the duration of said X-ray image, said electric circuit including first circuit means traversed by electrons forming said image and second circuit means connected between said first circuit means and said source to control said source in response to the passage of a predetermined number of electrons through said first circuit means.
  • an image intensifier including a photoelectric member to produce an electron space-image of an object irradiated by said source and an electron-phosphor member spaced from said photoelectric member to produce a visible image in response to impingement of said electron space image thereon, and an electric circuit for controlling said source including circuit means connected to one of said members and traversed by electrons forming part of said spaceimage.
  • Apparatus for making photographs comprising an image amplifier including a photo-cathode and an anode for converting an X-ray image into a light image, a source of potential coupled to said cathode and anode, a camera including film optically coupled to said image amplifier for photographing the light image produced thereby, and means coupled to said source and responsive to the current flow between said cathode and anode for controlling the correct exposure of said film, said means including a capacitor arranged to be charged by said anode cathode current, and means responsive to the voltage across said capacitor to terminate the X-ray image to thereby stop further exposure of the film.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
US242141A 1951-08-16 1951-08-16 Image amplifier phototimer Expired - Lifetime US2853619A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE513475D BE513475A (fr) 1951-08-16 minuterie photographique pour intensificateur d'image
US242141A US2853619A (en) 1951-08-16 1951-08-16 Image amplifier phototimer
GB16088/52A GB706671A (en) 1951-08-16 1952-06-26 Improvements in or relating to timing devices for use with x-rays and other penetrating radiations
FR1081108D FR1081108A (fr) 1951-08-16 1952-08-04 Commande à temps pour un renforçateur d'image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US242141A US2853619A (en) 1951-08-16 1951-08-16 Image amplifier phototimer

Publications (1)

Publication Number Publication Date
US2853619A true US2853619A (en) 1958-09-23

Family

ID=22913612

Family Applications (1)

Application Number Title Priority Date Filing Date
US242141A Expired - Lifetime US2853619A (en) 1951-08-16 1951-08-16 Image amplifier phototimer

Country Status (4)

Country Link
US (1) US2853619A (fr)
BE (1) BE513475A (fr)
FR (1) FR1081108A (fr)
GB (1) GB706671A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302023A (en) * 1964-02-20 1967-01-31 Myron M Schachter Apparatus for producing three-dimensional recordings of fluorescence spectra
US3440422A (en) * 1965-06-24 1969-04-22 Picker Corp Biplane x-ray image system
US3491239A (en) * 1965-09-22 1970-01-20 Gen Electric X-ray image amplifier system with automatic exposure control
US4092537A (en) * 1975-02-12 1978-05-30 Rolls-Royce (1971) Limited Diagnostic apparatus and method for gas turbine engines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL270378A (fr) * 1960-10-28
US3198947A (en) * 1961-02-21 1965-08-03 Lab For Electronics Inc Apparatus for producing visual images of x-rayed objects

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305452A (en) * 1939-09-28 1942-12-15 Kallmann Hartmut Israel Method and device for depicting the intensity distribution in a beam of slow neutrons
US2401289A (en) * 1943-07-22 1946-05-28 Nasa Photoelectric timer for roentgen photography
US2441324A (en) * 1946-05-15 1948-05-11 Us Sec War Radiation responsive system
US2523132A (en) * 1949-08-10 1950-09-19 Westinghouse Electric Corp Photosensitive apparatus
US2535817A (en) * 1942-09-14 1950-12-26 Nat Union Radio Corp Electrooptical dark trace storage tube
US2555545A (en) * 1947-08-28 1951-06-05 Westinghouse Electric Corp Image intensifier
US2561085A (en) * 1946-06-01 1951-07-17 Westinghouse Electric Corp Automatic exposure timer
US2586392A (en) * 1948-12-09 1952-02-19 Sheldon Edward Emanuel Motion-picture camera for X-ray images
US2595430A (en) * 1950-04-08 1952-05-06 Kenyon Instr Company Inc Photofluorographic apparatus
US2622219A (en) * 1949-07-09 1952-12-16 Hartford Nat Bank & Trust Co Television image tube
US2790085A (en) * 1953-07-17 1957-04-23 Philips Corp Device for making photographs of X-ray images by means of an image amplifier

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305452A (en) * 1939-09-28 1942-12-15 Kallmann Hartmut Israel Method and device for depicting the intensity distribution in a beam of slow neutrons
US2535817A (en) * 1942-09-14 1950-12-26 Nat Union Radio Corp Electrooptical dark trace storage tube
US2401289A (en) * 1943-07-22 1946-05-28 Nasa Photoelectric timer for roentgen photography
US2441324A (en) * 1946-05-15 1948-05-11 Us Sec War Radiation responsive system
US2561085A (en) * 1946-06-01 1951-07-17 Westinghouse Electric Corp Automatic exposure timer
US2555545A (en) * 1947-08-28 1951-06-05 Westinghouse Electric Corp Image intensifier
US2586392A (en) * 1948-12-09 1952-02-19 Sheldon Edward Emanuel Motion-picture camera for X-ray images
US2622219A (en) * 1949-07-09 1952-12-16 Hartford Nat Bank & Trust Co Television image tube
US2523132A (en) * 1949-08-10 1950-09-19 Westinghouse Electric Corp Photosensitive apparatus
US2595430A (en) * 1950-04-08 1952-05-06 Kenyon Instr Company Inc Photofluorographic apparatus
US2790085A (en) * 1953-07-17 1957-04-23 Philips Corp Device for making photographs of X-ray images by means of an image amplifier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302023A (en) * 1964-02-20 1967-01-31 Myron M Schachter Apparatus for producing three-dimensional recordings of fluorescence spectra
US3440422A (en) * 1965-06-24 1969-04-22 Picker Corp Biplane x-ray image system
US3491239A (en) * 1965-09-22 1970-01-20 Gen Electric X-ray image amplifier system with automatic exposure control
US4092537A (en) * 1975-02-12 1978-05-30 Rolls-Royce (1971) Limited Diagnostic apparatus and method for gas turbine engines

Also Published As

Publication number Publication date
BE513475A (fr) 1952-08-30
FR1081108A (fr) 1954-12-16
GB706671A (en) 1954-03-31

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