WO2010030750A3 - Adaptive compression of computed tomography projection data - Google Patents

Adaptive compression of computed tomography projection data Download PDF

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Publication number
WO2010030750A3
WO2010030750A3 PCT/US2009/056469 US2009056469W WO2010030750A3 WO 2010030750 A3 WO2010030750 A3 WO 2010030750A3 US 2009056469 W US2009056469 W US 2009056469W WO 2010030750 A3 WO2010030750 A3 WO 2010030750A3
Authority
WO
WIPO (PCT)
Prior art keywords
samples
projection data
attenuation
compressed
computed tomography
Prior art date
Application number
PCT/US2009/056469
Other languages
French (fr)
Other versions
WO2010030750A2 (en
Inventor
Albert W. Wegener
Yi Ling
Original Assignee
Samplify Systems, 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 Samplify Systems, Inc. filed Critical Samplify Systems, Inc.
Priority to EP09813585.8A priority Critical patent/EP2334237B1/en
Priority to JP2011526961A priority patent/JP5596034B2/en
Priority to CN200980135743.7A priority patent/CN102149328B/en
Publication of WO2010030750A2 publication Critical patent/WO2010030750A2/en
Publication of WO2010030750A3 publication Critical patent/WO2010030750A3/en
Priority to IL211612A priority patent/IL211612A0/en

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Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • 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
    • A61B6/032—Transmission computed tomography [CT]
    • 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
    • A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4064—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis specially adapted for producing a particular type of beam
    • A61B6/4078—Fan-beams
    • 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
    • A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
    • A61B6/4233—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
    • 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
    • A61B6/56—Details of data transmission or power supply, e.g. use of slip rings

Abstract

A compression subsystem for a computed tomography system compresses projection data to for efficient data transfer and storage. The compression includes applying an attenuation profile to an array of projection data samples. The attenuation profile is a function of sample coordinates and determines attenuation values applied to the samples. The attenuated samples are encoded and packed for data transfer. Alternatively, difference operators are applied to the attenuated samples and the differences are encoded. The average number of bits per compressed sample is monitored and the attenuation profiles can be modified to achieve a desired number of bits per compressed sample. The compressed samples are decompressed prior to image reconstruction processing. Decompression includes decoding the compressed samples and applying a gain profile to the decoded samples to restore the original dynamic range. This abstract does not limit the scope of the invention as described in the claims.
PCT/US2009/056469 2008-09-11 2009-09-10 Adaptive compression of computed tomography projection data WO2010030750A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP09813585.8A EP2334237B1 (en) 2008-09-11 2009-09-10 Adaptive compression of computed tomography projection data
JP2011526961A JP5596034B2 (en) 2008-09-11 2009-09-10 Adaptive compression of computed tomography projection data
CN200980135743.7A CN102149328B (en) 2008-09-11 2009-09-10 Adaptive compression of computed tomography projection data
IL211612A IL211612A0 (en) 2008-09-11 2011-03-07 Adaptive compression of computed tomography projection data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/208,839 US7852977B2 (en) 2008-09-11 2008-09-11 Adaptive compression of computed tomography projection data
US12/208,839 2008-09-11

Publications (2)

Publication Number Publication Date
WO2010030750A2 WO2010030750A2 (en) 2010-03-18
WO2010030750A3 true WO2010030750A3 (en) 2010-05-20

Family

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Family Applications (1)

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PCT/US2009/056469 WO2010030750A2 (en) 2008-09-11 2009-09-10 Adaptive compression of computed tomography projection data

Country Status (8)

Country Link
US (1) US7852977B2 (en)
EP (1) EP2334237B1 (en)
JP (1) JP5596034B2 (en)
KR (1) KR20110053478A (en)
CN (2) CN102149328B (en)
IL (1) IL211612A0 (en)
TW (1) TW201016015A (en)
WO (1) WO2010030750A2 (en)

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Also Published As

Publication number Publication date
CN102149328B (en) 2014-09-10
CN102149328A (en) 2011-08-10
US20100070836A1 (en) 2010-03-18
EP2334237A4 (en) 2013-12-25
KR20110053478A (en) 2011-05-23
JP2012501802A (en) 2012-01-26
CN201500135U (en) 2010-06-09
EP2334237A2 (en) 2011-06-22
EP2334237B1 (en) 2015-01-21
TW201016015A (en) 2010-04-16
WO2010030750A2 (en) 2010-03-18
US7852977B2 (en) 2010-12-14
JP5596034B2 (en) 2014-09-24
IL211612A0 (en) 2011-05-31

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