WO2001093763A3 - Event localization and fall-off correction by distance-dependent weighting - Google Patents

Event localization and fall-off correction by distance-dependent weighting Download PDF

Info

Publication number
WO2001093763A3
WO2001093763A3 PCT/US2001/017869 US0117869W WO0193763A3 WO 2001093763 A3 WO2001093763 A3 WO 2001093763A3 US 0117869 W US0117869 W US 0117869W WO 0193763 A3 WO0193763 A3 WO 0193763A3
Authority
WO
WIPO (PCT)
Prior art keywords
sensors
detected
correction
fall
distance
Prior art date
Application number
PCT/US2001/017869
Other languages
French (fr)
Other versions
WO2001093763A2 (en
Inventor
Frank P Difilippo
John F Vesel
Steven E Cooke
Original Assignee
Philips Med Syst Inc
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 Med Syst Inc filed Critical Philips Med Syst Inc
Priority to EP01944229A priority Critical patent/EP1328825A2/en
Publication of WO2001093763A2 publication Critical patent/WO2001093763A2/en
Publication of WO2001093763A3 publication Critical patent/WO2001093763A3/en

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
    • G01T1/1647—Processing of scintigraphic data
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computerised tomographs
    • A61B6/037—Emission tomography

Abstract

A nuclear camera system includes a detector (12) for receiving radiation from a subject (14) in an exam region (16). The detector (12) includes a scintillation crystal (20) that converts radiation events into flashes of light. An array of sensors (22) is arranged to receive the light flashes from the scintillation crystal (20). Each of the photomultiplier sensors (22) generates a respective sensor output value in response to each received light flash. A processor (26) determines when each of the radiation events is detected. At least one of an initial position and an energy of each of the detected radiation events is determined in accordance with respective distances (d1....d19) from a position of the detected event to the sensors (22). An image representation is generated from the initial positions and energies.
PCT/US2001/017869 2000-06-02 2001-06-01 Event localization and fall-off correction by distance-dependent weighting WO2001093763A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01944229A EP1328825A2 (en) 2000-06-02 2001-06-01 Event localization and fall-off correction by distance-dependent weighting

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US20903200P 2000-06-02 2000-06-02
US60/209,032 2000-06-02
US09/846,013 2001-04-30
US09/846,013 US6603125B1 (en) 2000-06-02 2001-04-30 Event localization and fall-off correction by distance-dependent weighting

Publications (2)

Publication Number Publication Date
WO2001093763A2 WO2001093763A2 (en) 2001-12-13
WO2001093763A3 true WO2001093763A3 (en) 2002-07-04

Family

ID=26903756

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/017869 WO2001093763A2 (en) 2000-06-02 2001-06-01 Event localization and fall-off correction by distance-dependent weighting

Country Status (3)

Country Link
US (2) US6603125B1 (en)
EP (1) EP1328825A2 (en)
WO (1) WO2001093763A2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6946658B2 (en) * 2002-07-05 2005-09-20 The Washington University Method and apparatus for increasing spatial resolution of a pet scanner
CA2404613C (en) * 2002-09-20 2008-07-08 Is2 Research Inc. Method of localizing a scintillation event in a scintillation camera
WO2004049001A1 (en) * 2002-11-27 2004-06-10 Koninklijke Philips Electronics N.V. Gamma camera with dynamic threshold
US7649175B2 (en) * 2004-01-13 2010-01-19 Koninklijke Philips Electronics N.V. Analog to digital conversion shift error correction
US7847260B2 (en) 2005-02-04 2010-12-07 Dan Inbar Nuclear threat detection
US20110101230A1 (en) * 2005-02-04 2011-05-05 Dan Inbar Advanced SNM Detector
US7820977B2 (en) * 2005-02-04 2010-10-26 Steve Beer Methods and apparatus for improved gamma spectra generation
US8173970B2 (en) 2005-02-04 2012-05-08 Dan Inbar Detection of nuclear materials
WO2007019708A1 (en) * 2005-08-18 2007-02-22 Societe De Commercialisation Des Produits De La Recherche Appliquee - Socpra Digital identification and vector quantization methods and systems for detector crystal recognition in radiation detection machines
US7446308B2 (en) * 2005-12-22 2008-11-04 Baker Hughes Incorporated Method of calibrating multi-channel nuclear energy spectra
US20100254311A1 (en) * 2007-05-25 2010-10-07 Osvaldo Simeone Pulse-Coupled Discrete-Time Phase Locked Loops For Wireless Networks
US8340377B2 (en) * 2007-09-17 2012-12-25 Siemens Medical Solutions Usa, Inc. Method for energy calculation and pileup determination for continuously sampled nuclear pulse processing
WO2009054070A1 (en) * 2007-10-26 2009-04-30 Shimadzu Corporation Radiation detector
US8384037B2 (en) * 2008-09-11 2013-02-26 Siemens Medical Solutions Usa, Inc. Use of crystal location in nuclear imaging apparatus to minimize timing degradation in a photodetector array
US8115172B2 (en) * 2008-09-26 2012-02-14 Siemens Medical Solutions Usa, Inc. Position-weighted location of scintillation events
DE102009042054A1 (en) * 2009-09-15 2011-03-24 Mirion Technologies (Rados) Gmbh Method for detecting a contamination on a moving object and measuring device for this purpose
US8450693B2 (en) * 2009-12-11 2013-05-28 General Electric Company Method and system for fault-tolerant reconstruction of images
US20110142367A1 (en) * 2009-12-15 2011-06-16 Charles William Stearns Methods and systems for correcting image scatter
EP2762832B1 (en) * 2013-01-30 2018-06-13 Hexagon Technology Center GmbH Optical single-point measurement
CN104337531B (en) * 2013-07-25 2016-12-28 苏州瑞派宁科技有限公司 Method and system are met at heat input for digital PET system
CN105637386B (en) 2013-10-14 2019-01-15 皇家飞利浦有限公司 Histogram in positron emission tomography (PET) energy histogram is smooth
US9606245B1 (en) 2015-03-24 2017-03-28 The Research Foundation For The State University Of New York Autonomous gamma, X-ray, and particle detector
WO2016201131A1 (en) * 2015-06-09 2016-12-15 University Of Washington Gamma camera scintillation event positioning
CN105115994A (en) * 2015-07-22 2015-12-02 武汉数字派特科技有限公司 Digital PET energy parameterization calibration method and system
US10182194B2 (en) * 2016-02-19 2019-01-15 Karim S. Karim Method and apparatus for improved detective quantum efficiency in an X-ray detector
CN111051926B (en) * 2017-07-31 2024-01-30 株式会社岛津制作所 Radiation detector and nuclear medicine diagnostic device
EP3864440A4 (en) * 2018-10-09 2022-05-25 Shenzhen Xpectvision Technology Co., Ltd. Methods and systems for forming images with radiation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5576547A (en) * 1993-07-27 1996-11-19 Park Medical Systems Inc. Position calculation and energy correction in the digital scintillation camera
FR2757956A1 (en) * 1996-12-31 1998-07-03 Commissariat Energie Atomique DEVICE AND METHOD FOR NUCLEAR LOCALIZATION BY CALCULATION OF ITERATIVE BARYCENTER, AND APPLICATION TO GAMMA-CAMERAS

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899054A (en) * 1988-01-19 1990-02-06 General Electric Company Gamma camera with image uniformity by energy correction offsets
DE59102128D1 (en) 1991-09-11 1994-08-11 Siemens Ag Procedure for fast location using the maximum likelihood estimator for a gamma camera.
US5576546A (en) * 1992-10-28 1996-11-19 Park Medical Systems Inc. Depth-of-interaction normalization of signals for improved positioning, and energy resolution in scintillation camera
US5345082A (en) 1993-03-22 1994-09-06 Sopha Medical Systems, Inc. Scintillation camera utilizing energy dependent linearity correction
GB9314398D0 (en) * 1993-07-12 1993-08-25 Gen Electric Signal processing in scintillation cameras for nuclear medicine
US5410153A (en) * 1993-07-27 1995-04-25 Park Medical Systems, Inc. Position calculation in a scintillation camera
US5508524A (en) * 1994-10-03 1996-04-16 Adac Laboratories, Inc. Spatially variant PMT cluster constitution and spatially variant PMT weights
US5491342A (en) 1994-11-10 1996-02-13 Trionix Research Laboratory, Inc. Apparatus and method for nuclear camera calibration
US5545898A (en) * 1994-12-13 1996-08-13 Park Medical Systems, Inc. Scintillation camera position calculation with uniform resolution using variance injection
FR2755815B1 (en) * 1996-11-08 1998-12-18 Commissariat Energie Atomique DEVICE AND METHOD FOR DETERMINING THE PRESUMED POSITION OF AN EVENT IN RELATION TO A SET OF PHOTODETECTORS, AND APPLICATION TO GAMMA-CAMERAS
FR2757955B1 (en) * 1996-12-31 1999-01-29 Commissariat Energie Atomique DEVICE AND METHOD FOR NUCLEAR LOCALIZATION BY CALCULATION OF PARALLEL BARYCENTER, AND APPLICATION TO GAMMA-CAMERAS
US6169287B1 (en) * 1997-03-10 2001-01-02 William K. Warburton X-ray detector method and apparatus for obtaining spatial, energy, and/or timing information using signals from neighboring electrodes in an electrode array
CA2288788A1 (en) * 1997-05-07 1998-11-12 Board Of Regents, The University Of Texas System Method and apparatus to prevent pile-up when detecting the energy of incoming signals
CA2212196A1 (en) * 1997-08-01 1999-02-01 Is2 Research Inc. Medical diagnostic apparatus and method
US6252232B1 (en) * 1998-06-29 2001-06-26 General Electric Company Digital integrator
CA2248424A1 (en) * 1998-09-25 2000-03-25 Is2 Research Inc. Image generation method
US6169285B1 (en) * 1998-10-23 2001-01-02 Adac Laboratories Radiation-based imaging system employing virtual light-responsive elements
US6198104B1 (en) * 1998-10-23 2001-03-06 Adac Laboratories Randoms correction using artificial trigger pulses in a gamma camera system
US6291825B1 (en) * 1998-10-23 2001-09-18 Adac Laboratories Method and apparatus for performing pulse pile-up corrections in a gamma camera system
US6525323B1 (en) * 2000-04-18 2003-02-25 Koninklijke Philips Electronics, N.V. Method and apparatus for improved estimation of characteristics of pulses detected by a nuclear camera

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5576547A (en) * 1993-07-27 1996-11-19 Park Medical Systems Inc. Position calculation and energy correction in the digital scintillation camera
FR2757956A1 (en) * 1996-12-31 1998-07-03 Commissariat Energie Atomique DEVICE AND METHOD FOR NUCLEAR LOCALIZATION BY CALCULATION OF ITERATIVE BARYCENTER, AND APPLICATION TO GAMMA-CAMERAS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GEAGAN M J ET AL: "Correction of distortions in a discontinuous image", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, SECTION - A: ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, NORTH-HOLLAND PUBLISHING COMPANY. AMSTERDAM, NL, vol. A353, no. 1, 30 December 1994 (1994-12-30), pages 379 - 383, XP004005899, ISSN: 0168-9002 *

Also Published As

Publication number Publication date
US20030116713A1 (en) 2003-06-26
US6603125B1 (en) 2003-08-05
US6723993B2 (en) 2004-04-20
WO2001093763A2 (en) 2001-12-13
EP1328825A2 (en) 2003-07-23

Similar Documents

Publication Publication Date Title
WO2001093763A3 (en) Event localization and fall-off correction by distance-dependent weighting
EP1475649A8 (en) X-ray imaging apparatus and method using a flat amorphous silicon imaging panel
WO2005116691A8 (en) Gamma ray detectors
RU98107246A (en) DEVICE AND METHOD FOR OBTAINING X-RAY IMAGES USING A FLAT PANEL OF AN AMORPHIC SILICON IMAGE
CN101019041A (en) Detector for radiation directivity, and method and device for monitoring radiations
CA2293497A1 (en) X-ray detection system using active pixel sensors
JP2017537310A5 (en)
GB2335540B (en) Imaging device for imaging radiation
WO1993020461A1 (en) Gain calibration in a scintillation camera
JPS5560903A (en) Focus detector
JPH0513279B2 (en)
WO2001079884A3 (en) Hand held camera with tomograhic capability
RU2297015C1 (en) Scintillation detector
JPS57204504A (en) Photodetection part of focus detector
US11275183B2 (en) Radon detection with a three-part diffusion chamber and scintillation coating over an extended surface
RU2191408C2 (en) Portal radiation monitor
KR101042567B1 (en) Compton Camera
JPS55121113A (en) Tactile sensor using semiconductor device
US4864139A (en) Radiation detector and monitor
US5767518A (en) Fiber optic x-ray exposure control sensor
RU2303278C1 (en) Scintillation detector
JPH04353787A (en) Scintillation camera device
RU2207592C2 (en) Device detecting radioactive materials
JPS5548672A (en) Detecting method for radiation energy storage quantity
JPWO2023080044A5 (en)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): JP

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

REEP Request for entry into the european phase

Ref document number: 2001944229

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2001944229

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2001944229

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP