GB837171A - Improvements in or relating to x-ray apparatus - Google Patents
Improvements in or relating to x-ray apparatusInfo
- 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
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
- H05G1/64—Circuit arrangements for X-ray apparatus incorporating image intensifiers
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent 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.
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)
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 |
-
1957
- 1957-03-13 US US645694A patent/US2885558A/en not_active Expired - Lifetime
- 1957-10-11 FR FR1184254D patent/FR1184254A/en not_active Expired
-
1958
- 1958-02-22 DE DE1958W0022832 patent/DE1048646C2/de not_active Expired
- 1958-03-05 GB GB7050/58A patent/GB837171A/en not_active Expired
- 1958-03-12 JP JP642658A patent/JPS35428B1/ja active Pending
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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