JPH0260025B2 - - Google Patents

Info

Publication number
JPH0260025B2
JPH0260025B2 JP5473385A JP5473385A JPH0260025B2 JP H0260025 B2 JPH0260025 B2 JP H0260025B2 JP 5473385 A JP5473385 A JP 5473385A JP 5473385 A JP5473385 A JP 5473385A JP H0260025 B2 JPH0260025 B2 JP H0260025B2
Authority
JP
Japan
Prior art keywords
input signal
fourier transform
dft
input
signal
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 - Lifetime
Application number
JP5473385A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60238973A (ja
Inventor
Rosu Kuraufuoodo Kaaru
Chandora Akuhaaya Kishoaa
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of JPS60238973A publication Critical patent/JPS60238973A/ja
Publication of JPH0260025B2 publication Critical patent/JPH0260025B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T12/00—Tomographic reconstruction from projections
    • G06T12/10—Image preprocessing, e.g. calibration, positioning of sources or scatter correction
    • 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
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5258—Devices using data or image processing specially adapted for radiation diagnosis involving detection or reduction of artifacts or noise
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S378/00—X-ray or gamma ray systems or devices
    • Y10S378/901—Computer tomography program or processor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Complex Calculations (AREA)
  • Image Processing (AREA)
JP60054733A 1984-03-21 1985-03-20 畳込み積分をする装置 Granted JPS60238973A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/591,730 US4606004A (en) 1984-03-21 1984-03-21 Apparatus for reduction of filtration truncation errors
US591730 1984-03-21

Publications (2)

Publication Number Publication Date
JPS60238973A JPS60238973A (ja) 1985-11-27
JPH0260025B2 true JPH0260025B2 (https=) 1990-12-14

Family

ID=24367677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60054733A Granted JPS60238973A (ja) 1984-03-21 1985-03-20 畳込み積分をする装置

Country Status (4)

Country Link
US (1) US4606004A (https=)
JP (1) JPS60238973A (https=)
DE (1) DE3509777A1 (https=)
IL (1) IL74566A (https=)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703349A (en) * 1985-03-19 1987-10-27 Picturetel Corporation Method and apparatus for multi-dimensional signal processing using a Short-Space Fourier transform
JP2598038B2 (ja) * 1987-09-30 1997-04-09 株式会社東芝 磁気共鳴映像装置
US5043890A (en) * 1989-06-12 1991-08-27 General Electric Compensation of computed tomography data for objects positioned outside the field of view of the reconstructed image
US5210688A (en) * 1990-05-21 1993-05-11 General Motors Corporation Sinography method and apparatus
EP0509576B1 (en) * 1991-04-18 1998-01-28 Ampex Systems Corporation Method and apparatus for determining a quantizing factor for processes involving multiple compression/decompression of data
US5170439A (en) * 1991-06-11 1992-12-08 Picker International, Inc. Cone beam reconstruction using combined circle and line orbits
US5404293A (en) * 1991-06-11 1995-04-04 The University Of Utah Cone beam reconstruction using helical data collection paths
US5361291A (en) * 1991-11-20 1994-11-01 General Electric Company Deconvolution filter for CT system
US5225980A (en) * 1991-11-27 1993-07-06 General Electric Company Reduction of image artifacts from support structures in tomographic imaging
US5390258A (en) * 1992-08-07 1995-02-14 Argonne National Laboratories/University Of Chicago Development Corporation Feature guided method and apparatus for obtaining an image of an object
US5546472A (en) * 1992-08-07 1996-08-13 Arch Development Corp. Feature guided method and apparatus for obtaining an image of an object
DE4429517C2 (de) * 1994-08-19 1996-08-14 Man Technologie Gmbh Vorrichtung und Verfahren zur Korrektur einer Meßkurve oder eines Signalverlaufs und deren bzw. dessen Anwendung zur Rekonstruktion von Lagefehlern bei Bahngleisen aus geometrischen Relativmessungen
DE19626775A1 (de) * 1996-07-03 1998-01-08 Siemens Ag Schnelle Faltung von Projektionen
DE19930707C2 (de) * 1999-07-02 2003-04-10 Forschungszentrum Juelich Gmbh Meßverfahren, Meßvorrichtung sowie Auswerteelektronik
DE10119785C2 (de) * 2001-04-23 2003-07-17 Siemens Ag Verfahren zur Vermeidung von Überfaltungen in Phasenkodierrichtung bei der Kernspintomographie und dafür eingerichtete Kernspintomographieanlage
US7508909B2 (en) * 2006-04-24 2009-03-24 Battelle Energy Alliance, Llc Apparatus and method for inspecting a sealed container
US7813586B2 (en) * 2006-08-07 2010-10-12 Mela Sciences, Inc. Reducing noise in digital images
US8213694B2 (en) * 2008-02-29 2012-07-03 Barco N.V. Computed tomography reconstruction from truncated scans
US7961125B2 (en) * 2008-10-23 2011-06-14 Microchip Technology Incorporated Method and apparatus for dithering in multi-bit sigma-delta digital-to-analog converters
US10916037B2 (en) * 2018-12-13 2021-02-09 Canon Kabushiki Kaisha Method of encoding and decoding calibration marker identifiers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149248A (en) * 1975-12-23 1979-04-10 Varian Associates, Inc. Apparatus and method for reconstructing data
US4112303A (en) * 1977-02-25 1978-09-05 General Electric Company Gantry for computed tomography
US4283767A (en) * 1979-05-03 1981-08-11 Raytheon Company Multiple correlator reference processor
US4272680A (en) * 1979-12-03 1981-06-09 General Electric Company Modular array radiation detector
US4550371A (en) * 1982-09-27 1985-10-29 General Electric Company Method and apparatus for compensating CT images for truncated projections
US4511922A (en) * 1982-10-21 1985-04-16 Rca Corporation Digital television system with truncation error correction

Also Published As

Publication number Publication date
IL74566A (en) 1989-08-15
DE3509777C2 (https=) 1988-06-23
JPS60238973A (ja) 1985-11-27
DE3509777A1 (de) 1985-09-26
US4606004A (en) 1986-08-12
IL74566A0 (en) 1985-06-30

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