WO2003015634A1 - Exact filtered back projection (fbp) algorithm for spiral computer tomography - Google Patents

Exact filtered back projection (fbp) algorithm for spiral computer tomography Download PDF

Info

Publication number
WO2003015634A1
WO2003015634A1 PCT/US2002/025597 US0225597W WO03015634A1 WO 2003015634 A1 WO2003015634 A1 WO 2003015634A1 US 0225597 W US0225597 W US 0225597W WO 03015634 A1 WO03015634 A1 WO 03015634A1
Authority
WO
WIPO (PCT)
Prior art keywords
lines
reconstructing
steps
image
projection
Prior art date
Application number
PCT/US2002/025597
Other languages
English (en)
French (fr)
Other versions
WO2003015634A9 (en
WO2003015634B1 (en
Inventor
Alexander Katsevich
Original Assignee
Research Foundation Of The University Of Central Florida, Incorporated
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 Research Foundation Of The University Of Central Florida, Incorporated filed Critical Research Foundation Of The University Of Central Florida, Incorporated
Priority to JP2003520399A priority Critical patent/JP2005503204A/ja
Priority to KR10-2004-7002244A priority patent/KR20040040440A/ko
Priority to EP02794877A priority patent/EP1429658A4/en
Priority to CA002457134A priority patent/CA2457134A1/en
Publication of WO2003015634A1 publication Critical patent/WO2003015634A1/en
Publication of WO2003015634B1 publication Critical patent/WO2003015634B1/en
Priority to US10/523,867 priority patent/US7197105B2/en
Publication of WO2003015634A9 publication Critical patent/WO2003015634A9/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/02Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03Computerised tomographs
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/002D [Two Dimensional] image generation
    • G06T11/003Reconstruction from projections, e.g. tomography
    • G06T11/006Inverse problem, transformation from projection-space into object-space, e.g. transform methods, back-projection, algebraic methods
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/02Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/027Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2211/00Image generation
    • G06T2211/40Computed tomography
    • G06T2211/416Exact reconstruction
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2211/00Image generation
    • G06T2211/40Computed tomography
    • G06T2211/421Filtered back projection [FBP]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S378/00X-ray or gamma ray systems or devices
    • Y10S378/901Computer tomography program or processor
PCT/US2002/025597 2001-08-16 2002-08-13 Exact filtered back projection (fbp) algorithm for spiral computer tomography WO2003015634A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2003520399A JP2005503204A (ja) 2001-08-16 2002-08-13 スパイラル・コンピュータ断層撮影法のための厳密フィルタ補正逆投影(fbp)アルゴリズム
KR10-2004-7002244A KR20040040440A (ko) 2001-08-16 2002-08-13 나선형 컴퓨터 단층촬영용 최적 fbp 알고리즘
EP02794877A EP1429658A4 (en) 2001-08-16 2002-08-13 EXACTLY FILTERED BACKPROJECTION ALGORITHM (FBP) FOR SPIRAL COMPUTER TOMOGRAPHY
CA002457134A CA2457134A1 (en) 2001-08-16 2002-08-13 Exact filtered back projection (fbp) algorithm for spiral computer tomography
US10/523,867 US7197105B2 (en) 2001-08-16 2004-04-23 Efficient image reconstruction algorithm for the circle and line cone beam computed tomography

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US31282701P 2001-08-16 2001-08-16
US60/312,827 2001-08-16
US10/143,160 2002-05-10
US10/143,160 US6574299B1 (en) 2001-08-16 2002-05-10 Exact filtered back projection (FBP) algorithm for spiral computer tomography

Publications (3)

Publication Number Publication Date
WO2003015634A1 true WO2003015634A1 (en) 2003-02-27
WO2003015634B1 WO2003015634B1 (en) 2003-04-24
WO2003015634A9 WO2003015634A9 (en) 2004-04-29

Family

ID=26840733

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/025597 WO2003015634A1 (en) 2001-08-16 2002-08-13 Exact filtered back projection (fbp) algorithm for spiral computer tomography

Country Status (6)

Country Link
US (2) US6574299B1 (US06574299-20030603-M00010.png)
EP (1) EP1429658A4 (US06574299-20030603-M00010.png)
JP (1) JP2005503204A (US06574299-20030603-M00010.png)
KR (1) KR20040040440A (US06574299-20030603-M00010.png)
CA (1) CA2457134A1 (US06574299-20030603-M00010.png)
WO (1) WO2003015634A1 (US06574299-20030603-M00010.png)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004072905A1 (en) * 2003-02-14 2004-08-26 Koninklijke Philips Electronics N.V. System and method for helical cone-beam computed tomography with exact reconstruction
WO2005076775A2 (en) * 2003-08-29 2005-08-25 Wisconsin Alumni Research Foundation Image reconstruction method for divergent beam scanner
EP1605825A2 (en) * 2003-03-14 2005-12-21 Research Foundation of the University of Central Florida, Incorporated Efficient image reconstruction algorithm for variable pitch spiral computed tomography
WO2007004196A2 (en) * 2005-07-05 2007-01-11 Philips Intellectual Property & Standards Gmbh Exact fbp type algorithm for arbitrary trajectories
US8615121B2 (en) 2011-05-31 2013-12-24 General Electric Company Reconstruction of projection data to generate tomographic images having improved frequency characteristics
US8861829B2 (en) 2011-09-30 2014-10-14 General Electric Company Method and system for reconstruction of tomographic images
WO2014165455A3 (en) * 2013-04-04 2014-12-31 Illinois Tool Works Inc. Helical computed tomography
US9459217B2 (en) 2013-04-12 2016-10-04 Illinois Tool Works, Inc. High-resolution computed tomography

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7305061B2 (en) * 2001-08-16 2007-12-04 Research Foundation Of The University Of Central Florida Efficient image reconstruction algorithm for the circle and arc cone beam computer tomography
US7280632B2 (en) * 2001-08-16 2007-10-09 University Of Central Florida Research Foundation, Inc. Exact filtered back projection (FBP) algorithm for spiral computer tomography with variable pitch
US6771733B2 (en) * 2001-08-16 2004-08-03 University Of Central Florida Method of reconstructing images for spiral and non-spiral computer tomography
US6865246B2 (en) * 2001-09-26 2005-03-08 Massachusetts Institute Of Technology True 3D cone-beam imaging method and apparatus
US6944259B2 (en) * 2001-09-26 2005-09-13 Massachusetts Institute Of Technology Versatile cone-beam imaging apparatus and method
DE10252661A1 (de) * 2002-11-11 2004-05-27 Philips Intellectual Property & Standards Gmbh Exaktes Computertomographie-Verfahren und Computertomograph
EP1576446A4 (en) 2002-12-04 2009-02-18 Univ Central Florida Res Found 3PI ALGORITHM FOR SPIRAL COMPUTER TOMOGRAPHY
JP2007527253A (ja) * 2003-02-14 2007-09-27 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 冗長データを含むヘリカルコーンビーム・コンピュータ断層撮像法に対する正確な画像再構成システム及び方法
US7889835B2 (en) * 2003-08-07 2011-02-15 Morpho Detection, Inc. System and method for detecting an object by dynamically adjusting computational load
US7492855B2 (en) * 2003-08-07 2009-02-17 General Electric Company System and method for detecting an object
ATE463808T1 (de) 2003-10-14 2010-04-15 Koninkl Philips Electronics Nv Iterative daten-rekonstruktion
US7609807B2 (en) * 2004-02-17 2009-10-27 General Electric Company CT-Guided system and method for analyzing regions of interest for contraband detection
US7031430B2 (en) * 2004-04-06 2006-04-18 General Electric Company System and method for detecting objects with differential operators
US7356174B2 (en) * 2004-05-07 2008-04-08 General Electric Company Contraband detection system and method using variance data
US7324625B2 (en) * 2004-05-27 2008-01-29 L-3 Communications Security And Detection Systems, Inc. Contraband detection systems using a large-angle cone beam CT system
ATE490477T1 (de) * 2004-06-09 2010-12-15 Koninkl Philips Electronics Nv Computerisiertes tomographieverfahren mit helixförmiger relativbewegung und konischem strahl
JP2008506443A (ja) * 2004-07-13 2008-03-06 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 実測定値および架空測定値から対象物画像を再構成するコンピュータ断層撮影方法
US7372937B2 (en) * 2004-07-16 2008-05-13 University Of Iowa Research Foundation Systems and methods of non-standard spiral cone-beam computed tomograpy (CT)
US7424088B2 (en) * 2004-09-29 2008-09-09 Kabushiki Kaisha Toshiba Image reconstruction method using Hilbert transform
US7539281B2 (en) * 2004-10-15 2009-05-26 General Electric Company Methods and apparatus for reconstruction in helical cone beam volumetric CT
EP1828985A1 (en) * 2004-11-24 2007-09-05 Wisconsin Alumni Research Foundation Fan-beam and cone-beam image reconstruction using filtered backprojection of differentiated projection data
US7379525B2 (en) * 2004-12-15 2008-05-27 General Electric Company Method and system for efficient helical cone-beam reconstruction
WO2006116316A2 (en) 2005-04-22 2006-11-02 University Of Chicago Open source trajectory method and apparatus for interior imaging
US7477720B2 (en) * 2005-06-28 2009-01-13 University Of Utah Research Foundation Cone-beam reconstruction using backprojection of locally filtered projections and X-ray CT apparatus
US7590216B2 (en) * 2005-12-28 2009-09-15 University Of Central Florida Research Foundation, Inc. Cone beam local tomography
JP2007198866A (ja) * 2006-01-25 2007-08-09 Uni-Hite System Corp 広義サドルコーンビームct装置および3次元再構成法
US20070268994A1 (en) * 2006-05-02 2007-11-22 Guang-Hong Chen X- Ray System For Use in Image Guided Procedures
US7848479B1 (en) 2007-06-29 2010-12-07 University Of Central Florida Research Foundation, Inc. Image reconstruction for a general circle-plus trajectory
KR101018051B1 (ko) * 2008-10-23 2011-03-02 한국과학기술원 엑스선 촬영 영상에서 메탈 아티팩트를 감소시키는 방법
US8254656B2 (en) * 2009-10-13 2012-08-28 Morpho Detection, Inc. Methods and system for selective resolution improvement in computed tomography
US8483351B2 (en) * 2009-10-28 2013-07-09 Virginia Tech Intellectual Properties, Inc. Cardiac computed tomography methods and systems using fast exact/quasi-exact filtered back projection algorithms
US8805037B2 (en) 2011-05-31 2014-08-12 General Electric Company Method and system for reconstruction of tomographic images
US9235889B1 (en) 2012-06-11 2016-01-12 University Of Central Florida Research Foundation, Inc. Systems, apparatus and methods for collecting and storing raw scan data and software for performing data processing, image reconstruction and interpretation
US9420976B2 (en) * 2014-03-19 2016-08-23 General Electric Company Systems and methods for optimized source collimation
KR102591672B1 (ko) 2018-08-29 2023-10-20 한국전자통신연구원 영상 생성 장치, 영상 생성 장치를 포함하는 이미징 시스템 및 이미징 시스템의 동작 방법

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5663995A (en) 1996-06-06 1997-09-02 General Electric Company Systems and methods for reconstructing an image in a CT system performing a cone beam helical scan
US5706325A (en) 1996-12-05 1998-01-06 General Electric Company Exact regional reconstruction of longitudinally-unbounded objects using a circle-and-line cone beam tomographic system
US5784481A (en) 1996-06-25 1998-07-21 General Electric Company CT cone beam image reconstruction with circle and line scan path
US5881123A (en) 1998-03-31 1999-03-09 Siemens Corporate Research, Inc. Simplified cone beam image reconstruction using 3D backprojection
US5926521A (en) 1998-03-31 1999-07-20 Siemens Corporate Research, Inc. Exact region of interest cone beam imaging using 3D backprojection
US5960055A (en) 1997-12-19 1999-09-28 Siemens Corporate Research, Inc. Fast cone beam image reconstruction using a detector weight list
US6014419A (en) 1997-11-07 2000-01-11 Hu; Hui CT cone beam scanner with fast and complete data acquistion and accurate and efficient regional reconstruction
US6130930A (en) * 1999-03-22 2000-10-10 Siemens Corporate Research, Inc. Exact region of interest cone beam imaging without circle scans
US6233303B1 (en) 1999-07-21 2001-05-15 Siemens Corporate Research, Inc. Method and apparatus for reducing X-ray dosage in a spiral scan cone beam CT imaging system
US6459754B1 (en) * 1999-10-27 2002-10-01 Ge Medical Systems Global Technology Company, Llc Methods and apparatus for cone beam multislice CT correction

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3637074B2 (ja) 1992-12-15 2005-04-06 株式会社東芝 ヘリカルスキャン方式のコンピュータ断層撮影装置
JP3597918B2 (ja) 1995-09-11 2004-12-08 株式会社日立メディコ X線ct装置
IL120097A0 (en) 1997-01-29 1997-04-15 Elscint Ltd Variable current CT scanning
DE19723095C2 (de) 1997-06-02 2001-08-23 Siemens Ag Bildrekonstruktionsverfahren für einen Computertomographen
US6009142A (en) 1998-03-31 1999-12-28 Siemens Corporate Research, Inc. Practical cone beam image reconstruction using local regions-of-interest
JP3368838B2 (ja) 1998-08-06 2003-01-20 株式会社島津製作所 X線ct装置
US6173032B1 (en) 1998-09-29 2001-01-09 General Electric Company Methods and apparatus for image reconstruction
US6215841B1 (en) 1998-09-29 2001-04-10 General Electric Company Methods and apparatus for 3D artifact reduction
US6097784A (en) * 1998-09-30 2000-08-01 Picker International, Inc. 3D image reconstruction for helical partial cone beam data
US6266388B1 (en) 1999-09-07 2001-07-24 General Electric Company Methods and apparatus for two-pass cone beam image reconstruction
DE10009746B4 (de) 2000-03-01 2008-11-20 Siemens Ag Verfahren zur Reduzierung von Strichartefakten in einem CT-Bild
DE10035138A1 (de) 2000-07-19 2002-01-31 Philips Corp Intellectual Pty Computertomographie-Verfahren mit kegelförmiger Durcstrahlung eines Objekts
DE10035984C1 (de) 2000-07-24 2002-01-31 Siemens Ag Röntgen-Computertomographieeinrichtung
DE10038328A1 (de) 2000-08-05 2002-02-14 Philips Corp Intellectual Pty Computertomograph mit kegelförmigen Strahlenbündel und helixförmiger Relativbewegung
JP2002095655A (ja) 2000-09-26 2002-04-02 Shimadzu Corp Ct装置
JP3779166B2 (ja) 2000-10-27 2006-05-24 シャープ株式会社 階調表示用電圧発生装置、及びそれを備えた階調表示装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5663995A (en) 1996-06-06 1997-09-02 General Electric Company Systems and methods for reconstructing an image in a CT system performing a cone beam helical scan
US5784481A (en) 1996-06-25 1998-07-21 General Electric Company CT cone beam image reconstruction with circle and line scan path
US5706325A (en) 1996-12-05 1998-01-06 General Electric Company Exact regional reconstruction of longitudinally-unbounded objects using a circle-and-line cone beam tomographic system
US6014419A (en) 1997-11-07 2000-01-11 Hu; Hui CT cone beam scanner with fast and complete data acquistion and accurate and efficient regional reconstruction
US5960055A (en) 1997-12-19 1999-09-28 Siemens Corporate Research, Inc. Fast cone beam image reconstruction using a detector weight list
US5881123A (en) 1998-03-31 1999-03-09 Siemens Corporate Research, Inc. Simplified cone beam image reconstruction using 3D backprojection
US5926521A (en) 1998-03-31 1999-07-20 Siemens Corporate Research, Inc. Exact region of interest cone beam imaging using 3D backprojection
US6130930A (en) * 1999-03-22 2000-10-10 Siemens Corporate Research, Inc. Exact region of interest cone beam imaging without circle scans
US6233303B1 (en) 1999-07-21 2001-05-15 Siemens Corporate Research, Inc. Method and apparatus for reducing X-ray dosage in a spiral scan cone beam CT imaging system
US6459754B1 (en) * 1999-10-27 2002-10-01 Ge Medical Systems Global Technology Company, Llc Methods and apparatus for cone beam multislice CT correction

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004072905A1 (en) * 2003-02-14 2004-08-26 Koninklijke Philips Electronics N.V. System and method for helical cone-beam computed tomography with exact reconstruction
EP1605825A2 (en) * 2003-03-14 2005-12-21 Research Foundation of the University of Central Florida, Incorporated Efficient image reconstruction algorithm for variable pitch spiral computed tomography
EP1605825A4 (en) * 2003-03-14 2008-01-23 Univ Central Florida Res Found EFFICIENT IMAGE RECONSTRUCTION ALGORITHM FOR SPIRAL-COMPUTED TOMOGRAPHY WITH VARIABLE SLOPING
JP2007512034A (ja) * 2003-08-29 2007-05-17 ウイスコンシン アラムナイ リサーチ フオンデーシヨン 発散ビームスキャナのための画像再構成方法
WO2005076775A2 (en) * 2003-08-29 2005-08-25 Wisconsin Alumni Research Foundation Image reconstruction method for divergent beam scanner
WO2005076775A3 (en) * 2003-08-29 2007-01-18 Wisconsin Alumni Res Found Image reconstruction method for divergent beam scanner
WO2007004196A2 (en) * 2005-07-05 2007-01-11 Philips Intellectual Property & Standards Gmbh Exact fbp type algorithm for arbitrary trajectories
WO2007004196A3 (en) * 2005-07-05 2007-05-03 Philips Intellectual Property Exact fbp type algorithm for arbitrary trajectories
US8615121B2 (en) 2011-05-31 2013-12-24 General Electric Company Reconstruction of projection data to generate tomographic images having improved frequency characteristics
US8861829B2 (en) 2011-09-30 2014-10-14 General Electric Company Method and system for reconstruction of tomographic images
WO2014165455A3 (en) * 2013-04-04 2014-12-31 Illinois Tool Works Inc. Helical computed tomography
CN105264360A (zh) * 2013-04-04 2016-01-20 伊利诺斯工具制品有限公司 螺旋计算机断层成像
EP2981813B1 (en) * 2013-04-04 2019-03-27 Illinois Tool Works Inc. Helical computed tomography
US10247682B2 (en) 2013-04-04 2019-04-02 Illinois Tool Works Inc. Helical computed tomography
US9459217B2 (en) 2013-04-12 2016-10-04 Illinois Tool Works, Inc. High-resolution computed tomography

Also Published As

Publication number Publication date
CA2457134A1 (en) 2003-02-27
US6574299B1 (en) 2003-06-03
US6804321B2 (en) 2004-10-12
JP2005503204A (ja) 2005-02-03
WO2003015634A9 (en) 2004-04-29
EP1429658A1 (en) 2004-06-23
US20030174803A1 (en) 2003-09-18
KR20040040440A (ko) 2004-05-12
WO2003015634B1 (en) 2003-04-24
EP1429658A4 (en) 2009-04-22

Similar Documents

Publication Publication Date Title
US6574299B1 (en) Exact filtered back projection (FBP) algorithm for spiral computer tomography
Defrise et al. A solution to the long-object problem in helical cone-beam tomography
Noo et al. Exact helical reconstruction using native cone-beam geometries
EP0502187B1 (en) Parallel processing method and apparatus based on the algebra reconstruction technique for reconstructing a three-dimensional computerized tomography
CA2485376A1 (en) Method reconstructing images for spiral and non-spiral computer tomography
JP5019193B2 (ja) スキャン対象に関するct画像内の再構成点における画像データ値を決定する再構成方法及びx線コンピュータ断層撮影装置
Pan et al. A unified analysis of FBP-based algorithms in helical cone-beam and circular cone-and fan-beam scans
US7305061B2 (en) Efficient image reconstruction algorithm for the circle and arc cone beam computer tomography
EP1599836B1 (en) System and method for helical cone-beam computed tomography with exact reconstruction
Bruder et al. Single-slice rebinning reconstruction in spiral cone-beam computed tomography
US7197105B2 (en) Efficient image reconstruction algorithm for the circle and line cone beam computed tomography
Xiao et al. Fast Feldkamp algorithm for cone-beam computer tomography
JPH1028684A (ja) スパイラル動作におけるマルチライン検出器コンピュータ断層撮影装置に対する画像再構成方法
US7280632B2 (en) Exact filtered back projection (FBP) algorithm for spiral computer tomography with variable pitch
US7010079B2 (en) 3PI algorithm for spiral CT
US7848479B1 (en) Image reconstruction for a general circle-plus trajectory
EP1605825A2 (en) Efficient image reconstruction algorithm for variable pitch spiral computed tomography
WO2005107598A1 (en) Efficient circle and line cone beam computed tomography
Ziegler et al. Iterative reconstruction of a region of interest for transmission tomography
Li et al. Reconstruction algorithms
Zeng et al. 3d image reconstruction
EP1576446A2 (en) 3pi algorithm for spiral ct
Schöndube et al. Towards an efficient two-step Hilbert algorithm for helical cone-beam CT
Schondube et al. Comparative evaluation of two analytical methods for helical cone-beam tomography
De Francesco et al. State of the Art on X-Ray CT Reconstruction Methods

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GM HU ID IL IN IS JP KE KG KP KR KZ LK LR LS LT LU LV MA MD MG MK MW MX MZ NO NZ OM PH PL PT RO SD SE SG SI SK SL TJ TM TN TR TT UA UG UZ VN YU ZA ZM

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG AE AG AL AM AT AZ BA BB BG BR BY BZ CA CH CN CO CR CZ DE DK DM DZ EC EE ES FI GB GD GE HR HU ID IL IN IS JP KE KG KP KR KZ LC LR LS LT LU LV MA MD MG MK MN MW MZ NO NZ OM PH PL PT RO RU SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VN ZA ZM ZW GH GM KE LS MW MZ SD SZ TZ UG ZM ZW AM AZ

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
B Later publication of amended claims

Free format text: 20030129

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2457134

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2003520399

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 1020047002244

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2002794877

Country of ref document: EP

COP Corrected version of pamphlet

Free format text: PAGES 1/10-10/10, DRAWINGS, REPLACED BY NEW PAGES 1/10-10/10

WWP Wipo information: published in national office

Ref document number: 2002794877

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642