JPS57131086A - Simultaneous counter in positron ct system - Google Patents

Simultaneous counter in positron ct system

Info

Publication number
JPS57131086A
JPS57131086A JP56015070A JP1507081A JPS57131086A JP S57131086 A JPS57131086 A JP S57131086A JP 56015070 A JP56015070 A JP 56015070A JP 1507081 A JP1507081 A JP 1507081A JP S57131086 A JPS57131086 A JP S57131086A
Authority
JP
Japan
Prior art keywords
gate
input
output
delay element
positron
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
JP56015070A
Other languages
Japanese (ja)
Other versions
JPS6239904B2 (en
Inventor
Shinichi Inoue
Akira Ogushi
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 Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP56015070A priority Critical patent/JPS57131086A/en
Publication of JPS57131086A publication Critical patent/JPS57131086A/en
Publication of JPS6239904B2 publication Critical patent/JPS6239904B2/ja
Granted 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
    • G01T1/29—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
    • G01T1/2985—In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis)

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Measurement Of Radiation (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Nuclear Medicine (AREA)

Abstract

PURPOSE:To reduce the missing of counting at a high speed counting rate, by receiving the input for simultaneous counting on only one side of opposing detectors or groups, and inhibiting it on the other side. CONSTITUTION:The output of the detector 1 (group a) becomes the input of an AND gate 3 and the input of a delay element 2. The output of the detector 1 which is delayed by said delay element 2 becomes the input of an AND gate 30. Meanwhile, the outputs of the detectors 11A (groups d and e) become the inputs of the AND gates 3 and 30 through an OR gate 9A. As a result, the entire simultaneously counted output 4 of the group a and d or e is obtained from the AND gate 3, and the accidental simultaneously counted output 5 is obtained from the AND gate 30 as a result of the delay in the delay element 2.
JP56015070A 1981-02-05 1981-02-05 Simultaneous counter in positron ct system Granted JPS57131086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56015070A JPS57131086A (en) 1981-02-05 1981-02-05 Simultaneous counter in positron ct system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56015070A JPS57131086A (en) 1981-02-05 1981-02-05 Simultaneous counter in positron ct system

Publications (2)

Publication Number Publication Date
JPS57131086A true JPS57131086A (en) 1982-08-13
JPS6239904B2 JPS6239904B2 (en) 1987-08-25

Family

ID=11878584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56015070A Granted JPS57131086A (en) 1981-02-05 1981-02-05 Simultaneous counter in positron ct system

Country Status (1)

Country Link
JP (1) JPS57131086A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60144684A (en) * 1983-12-31 1985-07-31 Shimadzu Corp Simultaneous counting circuit
JPH02227691A (en) * 1989-02-28 1990-09-10 Shimadzu Corp Positron ct device
WO2005091989A3 (en) * 2004-03-19 2006-10-26 Triumf Operating As A Joint Ve A method and apparatus for vetoing random coincidences in positron emission tomographs

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60144684A (en) * 1983-12-31 1985-07-31 Shimadzu Corp Simultaneous counting circuit
JPH0557550B2 (en) * 1983-12-31 1993-08-24 Shimadzu Corp
JPH02227691A (en) * 1989-02-28 1990-09-10 Shimadzu Corp Positron ct device
WO2005091989A3 (en) * 2004-03-19 2006-10-26 Triumf Operating As A Joint Ve A method and apparatus for vetoing random coincidences in positron emission tomographs
US7253415B2 (en) * 2004-03-19 2007-08-07 Triumf Method and apparatus for vetoing random coincidences in positron emission tomographs
JP2007529750A (en) * 2004-03-19 2007-10-25 トライアンフ，オペレーティング アズ ア ジョイント ヴェンチャー バイ ザ ガバナーズ オブ ザ ユニバーシティ オブ アルバータ，ザ ユニバーシティ オブ ブリティッシュ コロンビア，カールトン Method and apparatus for denying random coincidence in positron emission cross section
JP4695640B2 (en) * 2004-03-19 2011-06-08 アドバンスト アプライド フィジックス ソリューションズ，インコーポレイテッド Method and apparatus for denying random coincidence in positron emission cross section

Also Published As

Publication number Publication date
JPS6239904B2 (en) 1987-08-25

Similar Documents

Publication Publication Date Title
JPS5730016A (en) Interface controlling system
JPS57131086A (en) Simultaneous counter in positron ct system
GB1132942A (en) Method and device for sorting articles such as coins
JPS57186836A (en) Counting circuit
JPS5713380A (en) Discriminating circuit for radiation detecting signal
JPS57119275A (en) Discriminating circuit for radiation detecting wave form
JPS5338944A (en) Abnormality detector
JPS5425377A (en) Abnormality diagnosing process for detector in control system
JPS52102773A (en) Digital rate meter
JPS5544224A (en) Circuit system for race detection
JPS579147A (en) Detector for synchronizing coding word
JPS57108905A (en) Synchronous queuing system for machine tool with plural movable members
SU1188750A1 (en) Digital function generator
JPS51149016A (en) Signal detection system
JPS55118232A (en) Pulse count circuit
JPS56126779A (en) Rejecting device for clutter
JPS53131899A (en) Malfunction preventing method of coin counters
GB1125317A (en) Automatic particle size data converting apparatus
JPS53148951A (en) Detector for pulse input time duration
JPS55166343A (en) Pulse counting system
JPS53109141A (en) Input device for protective relay
Brunchenko et al. Implementation of Some Types of Conditional Operations in Microprocessor Systems
JPS54138975A (en) Position pulse correcting circuit
JPS5346243A (en) Processor control system
JPS5348554A (en) Supervisory method for synthetic flowing amount