FR2270617A1 - Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power - Google Patents

Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power

Info

Publication number
FR2270617A1
FR2270617A1 FR7507686A FR7507686A FR2270617A1 FR 2270617 A1 FR2270617 A1 FR 2270617A1 FR 7507686 A FR7507686 A FR 7507686A FR 7507686 A FR7507686 A FR 7507686A FR 2270617 A1 FR2270617 A1 FR 2270617A1
Authority
FR
France
Prior art keywords
measuring
video signal
power
ray camera
radiation range
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
Application number
FR7507686A
Other languages
French (fr)
Other versions
FR2270617B1 (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to FR7507686A priority Critical patent/FR2270617A1/en
Publication of FR2270617A1 publication Critical patent/FR2270617A1/en
Application granted granted Critical
Publication of FR2270617B1 publication Critical patent/FR2270617B1/fr
Granted 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

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

The unit has a TV camera for recording the X-ray image of the patient, the video signal used to obtain information relating to the position of the significant parts of the image in turn used to select the required measuring fields in the trajectory of the X-rays, and the selected fields defining the instant of release and hence the tone of the film. Each measuring field is associated with a capacitor, which stores the mean amplitude of the video signal from the part of the TV image spatially corresponding to the measuring field. A peak value measuring unit for the video signal amplitude storing a value corresponding to the maximum intensity of the Xrays, is used to release the measuring fields corresponding to capacitors with a stored value only slightly below the peak value over a large time interval.
FR7507686A 1975-03-12 1975-03-12 Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power Granted FR2270617A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7507686A FR2270617A1 (en) 1975-03-12 1975-03-12 Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7507686A FR2270617A1 (en) 1975-03-12 1975-03-12 Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power

Publications (2)

Publication Number Publication Date
FR2270617A1 true FR2270617A1 (en) 1975-12-05
FR2270617B1 FR2270617B1 (en) 1982-01-22

Family

ID=9152456

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7507686A Granted FR2270617A1 (en) 1975-03-12 1975-03-12 Automatic setting unit for X-ray camera - has capacitor system measuring and setting radiation range and power

Country Status (1)

Country Link
FR (1) FR2270617A1 (en)

Also Published As

Publication number Publication date
FR2270617B1 (en) 1982-01-22

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Legal Events

Date Code Title Description
ST Notification of lapse