JPS5693300A - Automatic diaphragm device - Google Patents

Automatic diaphragm device

Info

Publication number
JPS5693300A
JPS5693300A JP16978679A JP16978679A JPS5693300A JP S5693300 A JPS5693300 A JP S5693300A JP 16978679 A JP16978679 A JP 16978679A JP 16978679 A JP16978679 A JP 16978679A JP S5693300 A JPS5693300 A JP S5693300A
Authority
JP
Japan
Prior art keywords
ray tube
converting device
ray
collimator
picture
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
JP16978679A
Other languages
Japanese (ja)
Other versions
JPS634320B2 (en
Inventor
Hitoshi Fujita
Kazumitsu Kawamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16978679A priority Critical patent/JPS5693300A/en
Publication of JPS5693300A publication Critical patent/JPS5693300A/en
Publication of JPS634320B2 publication Critical patent/JPS634320B2/ja
Granted legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/06—Diaphragms

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

PURPOSE:To control the diaphragm of a collimator automatically in the case of the device in which a x-ray tube is provided on one end of the U-shaped arm and a x-ray picture-optical picture converting device on the other end, by polygonally approximating distances between the both devices corresponding to parallel transfer. CONSTITUTION:A x-ray tube is provided on one end of the U-shaped arm and a x-ray picture-optical picture converting device on the other end, and both devices can move parallel in the adverse direction, said converting device can move vertically to the direction of the x-ray tube, and a collimator is provided so that a x-ray radiation field exposured to the x-ray tube may be stopped down to the size of an input area of said converting device. The parallel movement is detected with a detecting circuit 61 in order to control the aperture of the collimator, the linear approximation is performed with a compensating circuit 62a which controls the amplification factor linking with vertical movement and with an absolute value amplifying circuit 62b, the polygonal approximation is performed with a polygonally approximating circuit 63 corresponding to a change of distance between the x-ray tube and converting device, and a motor 65 for controlling the aperture of the diaphragm is operated with this output.
JP16978679A 1979-12-26 1979-12-26 Automatic diaphragm device Granted JPS5693300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16978679A JPS5693300A (en) 1979-12-26 1979-12-26 Automatic diaphragm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16978679A JPS5693300A (en) 1979-12-26 1979-12-26 Automatic diaphragm device

Publications (2)

Publication Number Publication Date
JPS5693300A true JPS5693300A (en) 1981-07-28
JPS634320B2 JPS634320B2 (en) 1988-01-28

Family

ID=15892840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16978679A Granted JPS5693300A (en) 1979-12-26 1979-12-26 Automatic diaphragm device

Country Status (1)

Country Link
JP (1) JPS5693300A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157309U (en) * 1981-03-28 1982-10-02
EP2221002A1 (en) * 2009-02-24 2010-08-25 Canon Kabushiki Kaisha Radiation imaging apparatus and processing method therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157309U (en) * 1981-03-28 1982-10-02
JPS6344014Y2 (en) * 1981-03-28 1988-11-16
EP2221002A1 (en) * 2009-02-24 2010-08-25 Canon Kabushiki Kaisha Radiation imaging apparatus and processing method therefor
US8475043B2 (en) 2009-02-24 2013-07-02 Canon Kabushiki Kaisha Radiation imaging apparatus and processing method therefor

Also Published As

Publication number Publication date
JPS634320B2 (en) 1988-01-28

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