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GB1353850A - Apparatus for determining the position coordinates of a light-pulse emitting point - Google Patents

Apparatus for determining the position coordinates of a light-pulse emitting point

Info

Publication number
GB1353850A
GB1353850A GB1691072A GB1691072A GB1353850A GB 1353850 A GB1353850 A GB 1353850A GB 1691072 A GB1691072 A GB 1691072A GB 1691072 A GB1691072 A GB 1691072A GB 1353850 A GB1353850 A GB 1353850A
Authority
GB
United Kingdom
Prior art keywords
screen
photomultiplier
point
determining
emitting point
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.)
Expired
Application number
GB1691072A
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.)
Optische Industrie de Oude Delft NV
Original Assignee
Optische Industrie de Oude Delft 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 Optische Industrie de Oude Delft NV filed Critical Optische Industrie de Oude Delft NV
Publication of GB1353850A publication Critical patent/GB1353850A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
    • G01T1/164—Scintigraphy
    • G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
    • G01T1/1645—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using electron optical imaging means, e.g. image intensifier tubes, coordinate photomultiplier tubes, image converter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2231/00—Cathode ray tubes or electron beam tubes
    • H01J2231/50—Imaging and conversion tubes
    • H01J2231/50005—Imaging and conversion tubes characterised by form of illumination
    • H01J2231/5001—Photons
    • H01J2231/50031—High energy photons

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Measurement Of Radiation (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1353850 Photo-electric position determining OPTISCHE INDUSTRIE " DE OUDE DELFT" NV 12 April 1972 [13 April 1971 17 June 1971] 16910/72 Heading H4D The position of a light pulse emitting point on a screen 6 is determined by photomultiplier tubes 1 to 5, arranged as shown, the difference in outputs of tubes 1, 2 and 3, 4 being divided by that of tube 5 by suitable circuitry. A discriminator 13 only allows points whose intensity falls within a predetermined range to be displayed on cathode-ray oscilloscope 14. Screen 6 may be the anode screen (29) (Fig. 2, not shown) of a gamma ray camera, the image intensifiers (21)-(24) of which are interconnected by fibre optics (25)-(27). Filters (37), (38) are placed in front of screen (29) and photomultiplier (35), (replacing 5 of Fig. 1), respectively to compensate for errors in position of the point in respect of the position of the primary particle entering the camera and for " vignetting ", i.e. variation of point brightness as a function of position on the screen. A lens (36) is used to form an image of screen (29) on photomultiplier (35).
GB1691072A 1971-04-13 1972-04-12 Apparatus for determining the position coordinates of a light-pulse emitting point Expired GB1353850A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7104844A NL7104844A (en) 1971-04-13 1971-04-13
NL7108304A NL7108304A (en) 1971-04-13 1971-06-17

Publications (1)

Publication Number Publication Date
GB1353850A true GB1353850A (en) 1974-05-22

Family

ID=26644648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1691072A Expired GB1353850A (en) 1971-04-13 1972-04-12 Apparatus for determining the position coordinates of a light-pulse emitting point

Country Status (10)

Country Link
JP (1) JPS4849463A (en)
BE (1) BE781902A (en)
CA (1) CA954639A (en)
CH (1) CH532259A (en)
DE (1) DE2217872A1 (en)
FR (1) FR2132892B1 (en)
GB (1) GB1353850A (en)
IT (1) IT951301B (en)
NL (2) NL7104844A (en)
SE (1) SE368094B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488411A1 (en) * 1980-08-08 1982-02-12 Thomson Csf CORRECTIVE SPACE NON-UNIFORMITY GAIN SYSTEM FOR SCINTIGRAPHIC CHAIN, AND CHAIN HAVING SUCH CORRECTIVE

Also Published As

Publication number Publication date
CH532259A (en) 1972-12-31
NL7108304A (en) 1972-12-19
JPS4849463A (en) 1973-07-12
FR2132892B1 (en) 1974-12-13
NL7104844A (en) 1972-10-17
FR2132892A1 (en) 1972-11-24
CA954639A (en) 1974-09-10
IT951301B (en) 1973-06-30
SE368094B (en) 1974-06-17
DE2217872A1 (en) 1972-10-19
BE781902A (en) 1972-07-31

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees