WO2013089155A8 - Ｘ線ｃｔ装置および散乱ｘ線補正方法 - Google Patents

Ｘ線ｃｔ装置および散乱ｘ線補正方法 Download PDF

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WO2013089155A8
WO2013089155A8 PCT/JP2012/082251 JP2012082251W WO2013089155A8 WO 2013089155 A8 WO2013089155 A8 WO 2013089155A8 JP 2012082251 W JP2012082251 W JP 2012082251W WO 2013089155 A8 WO2013089155 A8 WO 2013089155A8
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ray
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scattered
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image data
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WO2013089155A1 (ja
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悠史 坪田
史人 渡辺
康隆 昆野
小嶋　進一
Hironori UEKI (植木 広則)
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株式会社 日立メディコ
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Priority to JP2013549295A priority Critical patent/JP5815048B2/ja
Priority to US14/364,278 priority patent/US9307949B2/en
Priority to CN201280060843.XA priority patent/CN103987320B/zh
Publication of WO2013089155A1 publication Critical patent/WO2013089155A1/ja
Publication of WO2013089155A8 publication Critical patent/WO2013089155A8/ja

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    • 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
    • A61B6/5282—Devices using data or image processing specially adapted for radiation diagnosis involving detection or reduction of artifacts or noise due to scatter
    • 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
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/003—Reconstruction from projections, e.g. tomography
    • G06T11/005—Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
    • 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
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4291—Arrangements for detecting radiation specially adapted for radiation diagnosis the detector being combined with a grid or grating
    • 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
    • A61B6/5205—Devices using data or image processing specially adapted for radiation diagnosis involving processing of raw data to produce diagnostic data
    • 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
    • A61B6/58—Testing, adjusting or calibrating thereof
    • A61B6/582—Calibration
    • A61B6/583—Calibration using calibration phantoms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2211/00—Image generation
    • G06T2211/40—Computed tomography
    • G06T2211/416—Exact reconstruction

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

　Ｘ線ＣＴ画像において、散乱Ｘ線による画像低下を防止する。　Ｘ線ＣＴ装置（１００）は、Ｘ線検出器（４）などによって被写体（３）のＸ線透過像データを撮影し（Ｆ１）、撮影されたＸ線透過像データに基づいて、被写体３内部のＸ線吸収係数分布を推定する（Ｆ３）。Ｘ線ＣＴ装置（１００）は、推定されたＸ線吸収係数分布を有する模擬被写体（３）に対して、モンテカルロシミュレーションを実施して、被写体に由来する点拡がり関数または散乱Ｘ線分布を推定する（Ｆ４，Ｆ７）。そして、Ｘ線ＣＴ装置（１００）は、推定された点拡がり関数または散乱Ｘ線分布に基づいて、Ｘ線透過像データを補正して（Ｆ５，Ｆ８）、被写体（３）のＸ線吸収係数分布画像を形成する（Ｆ６，Ｆ９）。
PCT/JP2012/082251 2011-12-12 2012-12-12 Ｘ線ｃｔ装置および散乱ｘ線補正方法 WO2013089155A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2013549295A JP5815048B2 (ja) 2011-12-12 2012-12-12 Ｘ線ｃｔ装置
US14/364,278 US9307949B2 (en) 2011-12-12 2012-12-12 X-ray CT device and method for correcting scattered X-rays
CN201280060843.XA CN103987320B (zh) 2011-12-12 2012-12-12 X线ct装置以及散射x线校正方法

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JP2011-270845 2011-12-12
JP2011270845 2011-12-12

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WO2013089155A8 true WO2013089155A8 (ja) 2013-10-10

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US (1) US9307949B2 (ja)
JP (1) JP5815048B2 (ja)
CN (1) CN103987320B (ja)
WO (1) WO2013089155A1 (ja)

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CN104840211B (zh) * 2015-05-18 2018-12-25 上海联影医疗科技有限公司 一种投影图像的散射矫正方法及装置
CN105574828B (zh) * 2015-12-22 2019-01-25 沈阳东软医疗系统有限公司 图像散射校正方法、装置及设备
CN105631910B (zh) * 2015-12-28 2019-02-05 沈阳东软医疗系统有限公司 一种pet图像的重建方法及装置
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WO2013089155A1 (ja) 2013-06-20
US9307949B2 (en) 2016-04-12
CN103987320B (zh) 2016-04-13
JP5815048B2 (ja) 2015-11-17
CN103987320A (zh) 2014-08-13
JPWO2013089155A1 (ja) 2015-04-27
US20140328452A1 (en) 2014-11-06

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