GB837171A - Improvements in or relating to x-ray apparatus - Google Patents

Improvements in or relating to x-ray apparatus

Info

Publication number
GB837171A
GB837171A GB7050/58A GB705058A GB837171A GB 837171 A GB837171 A GB 837171A GB 7050/58 A GB7050/58 A GB 7050/58A GB 705058 A GB705058 A GB 705058A GB 837171 A GB837171 A GB 837171A
Authority
GB
United Kingdom
Prior art keywords
screen
rays
ray signal
ray
phosphor
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
GB7050/58A
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.)
CBS 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
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB837171A publication Critical patent/GB837171A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/64Circuit arrangements for X-ray apparatus incorporating image intensifiers
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K4/00Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00Electroluminescent light sources

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Luminescent Compositions (AREA)

Abstract

837,171. X-ray responsive electroluminescent screens. WESTINGHOUSE ELECTRIC CORPORATION. March 5, 1958 [March 13, 1957], No. 7050/58. Class 39(1). An X-ray responsive phosphor screen has a phosphor displaying an enhanced luminous output when excited by X-rays and simultaneously subjected to an alternating electric field and its luminous response to an X-ray signal is stored and later released by the following steps:-passing first X-rays of preselected intensity through an object having varying permeability to X-rays to generate an X-ray signal which is applied together with an alternating electric field to the screen to effect a phosphor-screen presensitiziation varying in amount with the quantity of X-rays applied thereto and corresponding to the X-ray signal, removing both the X-ray signal and the alternating field from the presensitized screen and thereafter irradiating the screen with second X-rays whereby a luminous image corresponding to the applied X-ray signal is reproduced thereon. The applied X-ray signal may be removed before or simultaneously with the applied electric field Preferably the second X-rays are of uniform intensity greater than the X-ray signal. The effect of the second irradiation is shown in Fig. 5 wherein the curve L, M, N shows the field enhanced brightness of the image for a given part of the screen and O, P, R the increased brightness of the same part of the screen after removing the X-ray signal and alternating field and applying the second X-rays. The storage time is stated to be up to about 17 hours. The phosphor screen construction is of the kind described in Specification 772,572. The electroluminescent material may be mixtures of zinc and cadmium sulphide wherein the ratio of Zn to Cd is from 9 : 1 to 3 : 7 activated by from 0À01 x 10-<SP>2</SP> to 6À0 x 10-<SP>2</SP> mole of manganese. Silver may also be present from a mere trace up to 1À0 x 10-<SP>2</SP> mole Ag per mole Mn. Specification 837,172 also is referred to.
GB7050/58A 1957-03-13 1958-03-05 Improvements in or relating to x-ray apparatus Expired GB837171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US645694A US2885558A (en) 1957-03-13 1957-03-13 X-ray system

Publications (1)

Publication Number Publication Date
GB837171A true GB837171A (en) 1960-06-09

Family

ID=24590077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7050/58A Expired GB837171A (en) 1957-03-13 1958-03-05 Improvements in or relating to x-ray apparatus

Country Status (5)

Country Link
US (1) US2885558A (en)
JP (1) JPS35428B1 (en)
DE (1) DE1048646C2 (en)
FR (1) FR1184254A (en)
GB (1) GB837171A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041456A (en) * 1956-11-26 1962-06-26 I J Mccullough Luminescent screens and methods of making same
US3173745A (en) * 1960-06-15 1965-03-16 Mcdonnell Aircraft Corp Image producing device and control therefor
US3967112A (en) 1973-06-15 1976-06-29 Sharp Kabushiki Kaisha Photo-image memory panel and activating method thereof

Also Published As

Publication number Publication date
FR1184254A (en) 1959-07-20
DE1048646B (en) 1959-01-15
JPS35428B1 (en) 1960-01-23
DE1048646C2 (en) 1959-07-09
US2885558A (en) 1959-05-05

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