JPS55144699A - X-ray automatic exposure controller - Google Patents

X-ray automatic exposure controller

Info

Publication number
JPS55144699A
JPS55144699A JP5289879A JP5289879A JPS55144699A JP S55144699 A JPS55144699 A JP S55144699A JP 5289879 A JP5289879 A JP 5289879A JP 5289879 A JP5289879 A JP 5289879A JP S55144699 A JPS55144699 A JP S55144699A
Authority
JP
Japan
Prior art keywords
comparators
outputs
reference voltage
output signals
photoelectric converters
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
Application number
JP5289879A
Other languages
Japanese (ja)
Inventor
Tokuzo Komai
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.)
Shimadzu Corp
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP5289879A priority Critical patent/JPS55144699A/en
Publication of JPS55144699A publication Critical patent/JPS55144699A/en
Pending legal-status Critical Current

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
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/38—Exposure time
    • H05G1/42—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
    • H05G1/44—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube in which the switching instant is determined by measuring the amount of radiation directly

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Abstract

PURPOSE:To automatically detect a detection point useful for the photographic effect and obtain a photograph with an adequate film blackening, by relatively comparing output signals at a plurality of detection points and logically deciding their comparison results. CONSTITUTION:Outputs of photoelectric converters 4-6 are input to integrators 7 integrated values of which are compared with the reference voltage of a reference voltage generator 9 in comparators 8. Outputs of the comparators 8 are fed to an X-ray disconnecting circuit 13 through gate circuits 12. Control signals for switching said gate circuits 12 are generated by applying output signals of the photoelectric converters 4-6 to a gate control signal generating circuit 14 through a divider 10 and logical decision circuit 11.
JP5289879A 1979-04-27 1979-04-27 X-ray automatic exposure controller Pending JPS55144699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5289879A JPS55144699A (en) 1979-04-27 1979-04-27 X-ray automatic exposure controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5289879A JPS55144699A (en) 1979-04-27 1979-04-27 X-ray automatic exposure controller

Publications (1)

Publication Number Publication Date
JPS55144699A true JPS55144699A (en) 1980-11-11

Family

ID=12927667

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5289879A Pending JPS55144699A (en) 1979-04-27 1979-04-27 X-ray automatic exposure controller

Country Status (1)

Country Link
JP (1) JPS55144699A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477826A1 (en) * 1980-03-04 1981-09-11 Siemens Ag RADIO-DIAGNOSTIC APPARATUS HAVING MEANS FOR FORMING A TRANSPARENCY SIGNAL
FR2577374A1 (en) * 1985-02-08 1986-08-14 Thomson Cgr Method of automatic adjustment of exposure in a radiology installation and radiology installation implementing such a method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132885A (en) * 1974-03-12 1975-10-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132885A (en) * 1974-03-12 1975-10-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477826A1 (en) * 1980-03-04 1981-09-11 Siemens Ag RADIO-DIAGNOSTIC APPARATUS HAVING MEANS FOR FORMING A TRANSPARENCY SIGNAL
FR2577374A1 (en) * 1985-02-08 1986-08-14 Thomson Cgr Method of automatic adjustment of exposure in a radiology installation and radiology installation implementing such a method

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