WO2002058558A3 - Method of calibration of a radiology apparatus and radiology apparatus - Google Patents

Method of calibration of a radiology apparatus and radiology apparatus Download PDF

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Publication number
WO2002058558A3
WO2002058558A3 PCT/US2001/049470 US0149470W WO02058558A3 WO 2002058558 A3 WO2002058558 A3 WO 2002058558A3 US 0149470 W US0149470 W US 0149470W WO 02058558 A3 WO02058558 A3 WO 02058558A3
Authority
WO
WIPO (PCT)
Prior art keywords
photons
radiology apparatus
image
ray beam
radiation
Prior art date
Application number
PCT/US2001/049470
Other languages
French (fr)
Other versions
WO2002058558A2 (en
Inventor
Remy Klausz
Lionel Desponds
Original Assignee
Ge Med Sys Global Tech Co Llc
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 Ge Med Sys Global Tech Co Llc filed Critical Ge Med Sys Global Tech Co Llc
Priority to EP01994333A priority Critical patent/EP1351606A2/en
Priority to JP2002558896A priority patent/JP2004528063A/en
Publication of WO2002058558A2 publication Critical patent/WO2002058558A2/en
Publication of WO2002058558A3 publication Critical patent/WO2002058558A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
    • 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
    • A61B6/58—Testing, adjusting or calibrating apparatus or devices for radiation diagnosis
    • A61B6/582—Calibration
    • A61B6/583—Calibration using calibration phantoms

Abstract

Method of calibration of a radiology apparatus of the type comprising a source of radiation of the X-ray beam, the X-ray beam being manifested by a flow of photons, that radiation consisting of X photons, a means of detection of the X-ray beam after it has crossed the organ to be visualized, image acquisition and processing means capable of supplying an image signal I and a means of visualization connected to the means of detection. The mean m and the variance σ2 of the image signal are calculated, the mean m and the variance σ2 being respectively equal to kN and to k2N by reason of the Poisson distribution, N being the number of photons on input of the detection device; the value of N and the value of a coefficient f are derived, f being the apparent gain of the radiology apparatus with B = fxN, B being a variable representing the intensity of the image; one then derives an index of X-ray dose having to be emitted by the radiation source in order to obtain on output an image satisfying predetermined quality thresholds.
PCT/US2001/049470 2001-01-09 2001-12-27 Method of calibration of a radiology apparatus and radiology apparatus WO2002058558A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01994333A EP1351606A2 (en) 2001-01-09 2001-12-27 Method of calibration of a radiology apparatus and radiology apparatus
JP2002558896A JP2004528063A (en) 2001-01-09 2001-12-27 Radiation device calibration method and radiation device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0100231A FR2819368B1 (en) 2001-01-09 2001-01-09 CALIBRATION METHOD OF RADIOLOGY APPARATUS, AND RADIOLOGY APPARATUS
FR01/00231 2001-01-09

Publications (2)

Publication Number Publication Date
WO2002058558A2 WO2002058558A2 (en) 2002-08-01
WO2002058558A3 true WO2002058558A3 (en) 2002-10-03

Family

ID=8858631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/049470 WO2002058558A2 (en) 2001-01-09 2001-12-27 Method of calibration of a radiology apparatus and radiology apparatus

Country Status (4)

Country Link
EP (1) EP1351606A2 (en)
JP (1) JP2004528063A (en)
FR (1) FR2819368B1 (en)
WO (1) WO2002058558A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009285356A (en) * 2008-05-30 2009-12-10 Institute Of National Colleges Of Technology Japan Image capturing system for medical use, image processing apparatus, image processing method, and program
JP6643043B2 (en) * 2015-10-30 2020-02-12 キヤノン株式会社 Radiation imaging system, signal processing device, and signal processing method for radiation image

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5396531A (en) * 1992-11-05 1995-03-07 General Electric Company Method of achieving reduced dose X-ray fluoroscopy by employing statistical estimation of poisson noise
US5692507A (en) * 1990-07-02 1997-12-02 Varian Associates, Inc. Computer tomography apparatus using image intensifier detector
EP1047018A1 (en) * 1999-04-22 2000-10-25 Ge Medical Systems Sa Method of localization and three-dimensional representation of elements of interest of an organ
EP1064880A1 (en) * 1999-07-01 2001-01-03 General Electric Company Apparatus and method for resolution calibration of radiographic images

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69307693T2 (en) * 1993-08-16 1997-07-24 Agfa Gevaert Nv Method and device for monitoring the sensitivity of a system for reproducing images stored in a photostimulable phosphor screen
DE4428672A1 (en) * 1994-08-12 1996-02-15 Siemens Ag Photomultiplier amplification factor determination method
US5841835A (en) 1997-03-31 1998-11-24 General Electric Company Apparatus and method for automatic monitoring and assessment of image quality in x-ray systems
DE69913311T2 (en) * 1998-10-19 2004-10-14 Koninklijke Philips Electronics N.V. X-RAY EXAMINATION DEVICE WITH REGULATION OF THE RADIATION DOSE
FR2786388B1 (en) 1998-11-27 2001-02-16 Ge Medical Syst Sa METHOD FOR DETECTING FABRIC OF A SPECIFIC NATURE IN DIGITAL RADIOLOGY AND ITS USE FOR ADJUSTING THE EXPOSURE PARAMETERS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692507A (en) * 1990-07-02 1997-12-02 Varian Associates, Inc. Computer tomography apparatus using image intensifier detector
US5396531A (en) * 1992-11-05 1995-03-07 General Electric Company Method of achieving reduced dose X-ray fluoroscopy by employing statistical estimation of poisson noise
EP1047018A1 (en) * 1999-04-22 2000-10-25 Ge Medical Systems Sa Method of localization and three-dimensional representation of elements of interest of an organ
EP1064880A1 (en) * 1999-07-01 2001-01-03 General Electric Company Apparatus and method for resolution calibration of radiographic images

Also Published As

Publication number Publication date
WO2002058558A2 (en) 2002-08-01
FR2819368A1 (en) 2002-07-12
EP1351606A2 (en) 2003-10-15
JP2004528063A (en) 2004-09-16
FR2819368B1 (en) 2006-09-15

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