JPS54148390A - Split-type automatic exposure device for x-ray shooting - Google Patents
Split-type automatic exposure device for x-ray shootingInfo
- Publication number
- JPS54148390A JPS54148390A JP5641078A JP5641078A JPS54148390A JP S54148390 A JPS54148390 A JP S54148390A JP 5641078 A JP5641078 A JP 5641078A JP 5641078 A JP5641078 A JP 5641078A JP S54148390 A JPS54148390 A JP S54148390A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- degree
- detector
- output
- split
- 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.)
- Pending
Links
Landscapes
- Radiography Using Non-Light Waves (AREA)
Abstract
PURPOSE: To obtain the optimum degree of exposure for the selected area by partitioning entire shooting viewfield by means of the split-type ionization chamber X-ray detector.
CONSTITUTION: The current sent from electrodes aWg on the upper surface of detector 6 is amplified 9 and selected 10. When performing the fluoroscopic observation, film cassette 7 does not exist. And the X-rays are changed to the electric signals through X-ray camera 8 and then projected on monitor 14 through mixter 13. The output current corresponding to the desired shooting area is selected 12 through electrodes aWg of detector 6. The degree of amplification is switched 11 for the selected 10 input current based on selection signal 12 and in reversely proportion to the number of selected electrodes, thus the output being kept constant. The image of the selected area is displayed on monitor 14 in overlap to the fluoroscipic image. When the cassette is inserted with the switch turned on, the output of switching circuit 11 is integrated 15 to control and shield 16 the high-voltage source at a fixed level, thus stopping generation of the X-rays. As a result, the degree of blackening can always be kept optimum for the picture of the selected area.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5641078A JPS54148390A (en) | 1978-05-12 | 1978-05-12 | Split-type automatic exposure device for x-ray shooting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5641078A JPS54148390A (en) | 1978-05-12 | 1978-05-12 | Split-type automatic exposure device for x-ray shooting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54148390A true JPS54148390A (en) | 1979-11-20 |
Family
ID=13026378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5641078A Pending JPS54148390A (en) | 1978-05-12 | 1978-05-12 | Split-type automatic exposure device for x-ray shooting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54148390A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009531090A (en) * | 2006-03-31 | 2009-09-03 | 徐克林 | Reciprocating foot massage device |
-
1978
- 1978-05-12 JP JP5641078A patent/JPS54148390A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009531090A (en) * | 2006-03-31 | 2009-09-03 | 徐克林 | Reciprocating foot massage device |
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