GB1368821A - Radioisotope scanners - Google Patents

Radioisotope scanners

Info

Publication number
GB1368821A
GB1368821A GB767271A GB767271A GB1368821A GB 1368821 A GB1368821 A GB 1368821A GB 767271 A GB767271 A GB 767271A GB 767271 A GB767271 A GB 767271A GB 1368821 A GB1368821 A GB 1368821A
Authority
GB
United Kingdom
Prior art keywords
signal
cathode
ray tube
scintillation
crystals
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
GB767271A
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB767271A priority Critical patent/GB1368821A/en
Publication of GB1368821A publication Critical patent/GB1368821A/en
Expired 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
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4057—Arrangements for generating radiation specially adapted for radiation diagnosis by using radiation sources located in the interior of the body
    • 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
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
    • A61B6/4258—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector for detecting non x-ray radiation, e.g. gamma radiation
    • 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
    • G01T1/1642—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using a scintillation crystal and position sensing photodetector arrays, e.g. ANGER cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2978—Hybrid imaging systems, e.g. using a position sensitive detector (camera) to determine the distribution in one direction and using mechanical movement of the detector or the subject in the other direction or using a camera to determine the distribution in two dimensions and using movement of the camera or the subject to increase the field of view
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation

Landscapes

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

Abstract

1368821 Local viewing NATIONAL RESEARCH DEVELOPMENT CORP 21 Sept 1971 [24 March 1971] 7672/71 Heading H4F [Also in Division G1] In a radioisotope scanner a plurality of scintillation crystals 13 packed, as shown, and having a photomultiplier tube 10A, 10B at each end, are placed beneath a series of collimated inlet channels 12 to receive radiation from a prone subject on a table 1 which is being moved transversely to the row of scintillation crystals by means of a rack 7 and a pinion 6 attached to a motor 8, the precise position of each source of radiation above a predetermined energy level being indicated on a cathode-ray tube 17 as the subject is scanned. The signal outputs VA, VB of the photomultipliers 10A and 10B are processed by a summing function circuit 21 to provide a signal proportional to (VA + VB) + K#VA.VB (which represents the energy of the scintillation event concerned) and pulse height analyser 22 to provide an output unblanking control signal for the cathode-ray tube 17 when the signal is large enough. The X deflection voltage for the cathode-ray tube 17 (representing the position of the scintillation event in the crystal row) is derived by applying the signals VA, VB to signal lengthening circuits 24A, 24B, gated with a pulse height analyser 22, whose outputs are fed to a logarithmic converter 23 to provide a log (VA/VB) function so that only signals of greater than a predetermined energy level apear on the screen. The Y deflection voltage is provided by a potentiometer 18 connected to the motor 8. The crystals are optically coupled with a paste material at the crystal interfaces and are packed in a container sealed against the ingress of moisture and having an optically reflective lining.
GB767271A 1971-03-24 1971-03-24 Radioisotope scanners Expired GB1368821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB767271A GB1368821A (en) 1971-03-24 1971-03-24 Radioisotope scanners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB767271A GB1368821A (en) 1971-03-24 1971-03-24 Radioisotope scanners

Publications (1)

Publication Number Publication Date
GB1368821A true GB1368821A (en) 1974-10-02

Family

ID=9837589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB767271A Expired GB1368821A (en) 1971-03-24 1971-03-24 Radioisotope scanners

Country Status (1)

Country Link
GB (1) GB1368821A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638164A (en) * 1984-10-17 1987-01-20 Halliburton Company High resolution scintillation crystal
US4990785A (en) * 1989-07-03 1991-02-05 The Curators Of The University Of Missouri Radiation imaging apparatus and methods
WO2018005940A1 (en) * 2016-06-30 2018-01-04 General Electric Company Pixelated gamma detector
US20220050217A1 (en) * 2018-12-18 2022-02-17 Korea University Research And Business Foundation Apparatus for detecting position of radiation source
US11762105B2 (en) 2018-12-18 2023-09-19 Korea University Research And Business Foundation Apparatus for detecting position of radiation source

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638164A (en) * 1984-10-17 1987-01-20 Halliburton Company High resolution scintillation crystal
US4990785A (en) * 1989-07-03 1991-02-05 The Curators Of The University Of Missouri Radiation imaging apparatus and methods
WO2018005940A1 (en) * 2016-06-30 2018-01-04 General Electric Company Pixelated gamma detector
CN109313277A (en) * 2016-06-30 2019-02-05 通用电气公司 The gamma ray detector of pixelation
US20220050217A1 (en) * 2018-12-18 2022-02-17 Korea University Research And Business Foundation Apparatus for detecting position of radiation source
US11675093B2 (en) * 2018-12-18 2023-06-13 Korea University Research And Business Foundation Apparatus for detecting position of radiation source
US11762105B2 (en) 2018-12-18 2023-09-19 Korea University Research And Business Foundation Apparatus for detecting position of radiation source

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee