JPS54157097A - X-ray automatic exposure control unit - Google Patents
X-ray automatic exposure control unitInfo
- Publication number
- JPS54157097A JPS54157097A JP6607678A JP6607678A JPS54157097A JP S54157097 A JPS54157097 A JP S54157097A JP 6607678 A JP6607678 A JP 6607678A JP 6607678 A JP6607678 A JP 6607678A JP S54157097 A JPS54157097 A JP S54157097A
- Authority
- JP
- Japan
- Prior art keywords
- luminance
- ray
- signal
- level
- input
- 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.)
- Granted
Links
Abstract
PURPOSE: To make a picture luminance fixed approximately, shorten the diagnosis time and reduce the X-ray exposure quantity by detecting automatically only a signal part, which is in a luminance level set previously, from X-ray TV signals and controlling exposure on a basis of the detection result.
CONSTITUTION: As regards the input of automatic exposure control circuit 2-1, TV picture signals obtained from TV camera controller 1-13 are taken as VI, and this signal VI is led to window-type comparator 3-1. Then, if upper limit set level input VU and lower limit set level input VL of this comparator are set to proper values, a signal section in a proper level set previously is detected, and control signal are generated correspondingly to only the part within a luminance level range set previously and are inputted to X-ray controller 1-12. As a result, the luminance of pictures can be fixed approximately even if parts having the extreme luminance exist on the screen, and the diagnosis time can be shortened, and the X-ray exposure quantity can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6607678A JPS54157097A (en) | 1978-06-01 | 1978-06-01 | X-ray automatic exposure control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6607678A JPS54157097A (en) | 1978-06-01 | 1978-06-01 | X-ray automatic exposure control unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54157097A true JPS54157097A (en) | 1979-12-11 |
JPS6144400B2 JPS6144400B2 (en) | 1986-10-02 |
Family
ID=13305384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6607678A Granted JPS54157097A (en) | 1978-06-01 | 1978-06-01 | X-ray automatic exposure control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54157097A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61157343U (en) * | 1985-03-20 | 1986-09-30 |
-
1978
- 1978-06-01 JP JP6607678A patent/JPS54157097A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6144400B2 (en) | 1986-10-02 |
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