GB834815A - Radiographic method and apparatus - Google Patents

Radiographic method and apparatus

Info

Publication number
GB834815A
GB834815A GB1745456A GB1745456A GB834815A GB 834815 A GB834815 A GB 834815A GB 1745456 A GB1745456 A GB 1745456A GB 1745456 A GB1745456 A GB 1745456A GB 834815 A GB834815 A GB 834815A
Authority
GB
United Kingdom
Prior art keywords
ray
subject
scan
scanning
film
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
GB1745456A
Inventor
Dwin R Craig
William F Hamilton
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.)
RICHARD NEWHALL JOHNSON
Original Assignee
RICHARD NEWHALL JOHNSON
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 RICHARD NEWHALL JOHNSON filed Critical RICHARD NEWHALL JOHNSON
Priority to GB1745456A priority Critical patent/GB834815A/en
Publication of GB834815A publication Critical patent/GB834815A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays

Abstract

834,815. Automatic X-ray intensity control systems. JOHNSON, R. N. June 6, 1956, No. 17454/56. Class 38 (4). Overall contrast on an X-ray film is reduced without loss of small-scale detail contrast by scanning the subject with a spot large compared with the scan-line spacing and with the detail required, and maintaining the total intensity of the X-rays transmitted through the subject substantially constant. As shown, an electron beam from a cathode 10 is caused to scan an X-ray producing target 22 by horizontal and vertical sweep generators 16 and 20 and hence a ray from aperture 24 in lead shield 26 forms a spot-scanning the subject 28 and producing an image on an X-ray sensitive film 32; the X-rays transmitted by the film are converted by scintillating element 34 into visible light which acts through photo-multiplier 36, amplifier 40, and control electrode 12 to keep the transmitted intensity substantially constant. Instead of the sweep generators 16 and 20, a scanning disc may be used between the X-ray source and the subject. The ratio of spot size to scan-line spacing may be from 3 : 1 to 10 : 1. Specification 790,509, describing a somewhat similar photographic method using visible light instead of X-rays, is referred to.
GB1745456A 1956-06-06 1956-06-06 Radiographic method and apparatus Expired GB834815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1745456A GB834815A (en) 1956-06-06 1956-06-06 Radiographic method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1745456A GB834815A (en) 1956-06-06 1956-06-06 Radiographic method and apparatus

Publications (1)

Publication Number Publication Date
GB834815A true GB834815A (en) 1960-05-11

Family

ID=10095461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1745456A Expired GB834815A (en) 1956-06-06 1956-06-06 Radiographic method and apparatus

Country Status (1)

Country Link
GB (1) GB834815A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051377A (en) * 1974-12-23 1977-09-27 U.S. Philips Corporation Scanning x-ray examination apparatus
US6576661B1 (en) 1999-11-09 2003-06-10 Bayer Aktiengesellschaft Active ingredient combination having insecticidal and acaricidal characteristics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051377A (en) * 1974-12-23 1977-09-27 U.S. Philips Corporation Scanning x-ray examination apparatus
US6576661B1 (en) 1999-11-09 2003-06-10 Bayer Aktiengesellschaft Active ingredient combination having insecticidal and acaricidal characteristics

Similar Documents

Publication Publication Date Title
Galbraith et al. Light pulses from the night sky associated with cosmic rays
GB1475492A (en) Apparatus for examining objects by means of penetrating radiation
US2837657A (en) Radiographic method and apparatus
GB1240583A (en) Cinematographic x-ray equipment
Moon Amplifying and intensifying the fluoroscopic image by means of a scanning x-ray tube
GB834815A (en) Radiographic method and apparatus
ES334509A1 (en) A cathode ray tube device for the exhibition of color television images. (Machine-translation by Google Translate, not legally binding)
US2727183A (en) Radiation detector of the scanning type
Greatorex Image intensification using a flying-spot X-ray tube
GB1221071A (en) Pattern detection apparatus
CH309701A (en) Cathode ray tube with electromagnetic beam deflection and means for reducing interference radiation.
GB692985A (en) Improvements in or relating to x-ray apparatus
SU519887A1 (en) Gamma ray beam pointing device at the irradiated area
JPS5260686A (en) X-ray photoelectronic analysis
GB1236163A (en) Radiation detector devices
JPS54130891A (en) Tomograph using analogue picture memory
GB909995A (en) Scanned beam apparatus
GB734425A (en) X-ray diffraction apparatus
GB1209788A (en) Apparatus for producing and recording diffraction patterns
GB881464A (en) Improvements in and relating to radiography scanning systems
GB902564A (en) Improvements in or relating to apparatus for examining moving articles
GB869701A (en) Improvements relating to x-ray apparatus
JPS61118952A (en) Device for producing scanning images
Vorob'ev et al. On errors of indirect measurements of the total neutron fluxes
GB580887A (en) Improvements in or relating to television transmitting apparatus employing cathode ray tubes