JP6615531B2 - X線コンピュータ断層撮影装置及び医用画像処理装置 - Google Patents
X線コンピュータ断層撮影装置及び医用画像処理装置 Download PDFInfo
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- JP6615531B2 JP6615531B2 JP2015159723A JP2015159723A JP6615531B2 JP 6615531 B2 JP6615531 B2 JP 6615531B2 JP 2015159723 A JP2015159723 A JP 2015159723A JP 2015159723 A JP2015159723 A JP 2015159723A JP 6615531 B2 JP6615531 B2 JP 6615531B2
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- 238000002591 computed tomography Methods 0.000 title claims description 33
- 238000012545 processing Methods 0.000 title claims description 17
- 238000012937 correction Methods 0.000 claims description 16
- 238000003702 image correction Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 49
- 230000008569 process Effects 0.000 description 32
- 238000010586 diagram Methods 0.000 description 16
- 230000009467 reduction Effects 0.000 description 16
- 230000004069 differentiation Effects 0.000 description 11
- 238000011946 reduction process Methods 0.000 description 9
- 238000013459 approach Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 238000007408 cone-beam computed tomography Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
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- 229910052704 radon Inorganic materials 0.000 description 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical group [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- 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
- G06T11/006—Inverse problem, transformation from projection-space into object-space, e.g. transform methods, back-projection, algebraic methods
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- 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
- A61B6/027—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
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- 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]
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- 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
- A61B6/4085—Cone-beams
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- A61B6/00—Apparatus for radiation diagnosis, e.g. 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
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- 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
- G06T11/008—Specific post-processing after tomographic reconstruction, e.g. voxelisation, metal artifact correction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2211/00—Image generation
- G06T2211/40—Computed tomography
- G06T2211/404—Angiography
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2211/00—Image generation
- G06T2211/40—Computed tomography
- G06T2211/421—Filtered back projection [FBP]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2211/00—Image generation
- G06T2211/40—Computed tomography
- G06T2211/424—Iterative
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Description
Claims (5)
- X線管と、
前記X線管が発生するX線を検出するX線検出器と、
前記X線検出器によって検出されたX線に基づき生成された第1の画像を撮影対象の長手方向に沿って微分して微分済み画像を生成し、前記微分済み画像を順投影して微分済みデータを生成し、前記微分済みデータを用いたたたみ込み処理によりたたみ込み済みデータを生成し、前記たたみ込み済みデータを逆投影して第2の画像を生成し、前記第2の画像に基づいて前記第1の画像を補正して補正済み画像を生成することで、補正処理を実行する画像補正部と、
を具備するX線コンピュータ断層撮影装置。 - 前記画像補正部は、間引きされた複数のビューに関して前記微分済みデータを生成する請求項1記載のX線コンピュータ断層撮影装置。
- 前記画像補正部は、生成された前記補正済み画像を新たな前記第1の画像として、前記補正処理を逐次繰り返し実行する請求項1又は2記載のX線コンピュータ断層撮影装置。
- 前記画像補正部は、前記第1の画像から最大撮影視野に対応する第1の円形画像及び所定の撮影視野に対応する第2の円形画像を生成し、前記第1の円形画像及び第2の円形画像を前記第1の画像として、前記補正処理を実行する請求項1乃至3のうちいずれか一項記載のX線コンピュータ断層撮影装置。
- X線コンピュータ断層撮影装置によって撮影された第1の画像を記憶する記憶部と、
前記第1の画像を撮影対象の長手方向に沿って微分して微分済み画像を生成し、前記微分済み画像を順投影して微分済みデータを生成し、前記微分済みデータを用いたたたみ込み処理によりたたみ込み済みデータを生成し、前記たたみ込み済みデータを逆投影して第2の画像を生成し、前記第2の画像に基づいて前記第1の画像を補正して補正済み画像を生成することで、補正処理を実行する画像補正部と、
を具備する医用画像処理装置。
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Application Number | Priority Date | Filing Date | Title |
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US14/457,267 | 2014-08-12 | ||
US14/457,267 US9558569B2 (en) | 2014-08-12 | 2014-08-12 | Method and system for substantially reducing cone beam artifacts based upon image domain differentiation in circular computer tomography (CT) |
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JP2016039902A JP2016039902A (ja) | 2016-03-24 |
JP6615531B2 true JP6615531B2 (ja) | 2019-12-04 |
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US (1) | US9558569B2 (ja) |
JP (1) | JP6615531B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6983704B2 (ja) * | 2018-03-19 | 2021-12-17 | 株式会社ミツトヨ | 計測用x線ctの測定計画生成方法及び装置 |
CN109544657B (zh) * | 2018-12-05 | 2023-11-28 | 上海联影医疗科技股份有限公司 | 医学图像迭代重建方法、装置、计算机设备和存储介质 |
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Publication number | Priority date | Publication date | Assignee | Title |
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ATE385333T1 (de) * | 2003-07-18 | 2008-02-15 | Koninkl Philips Electronics Nv | Metallartefaktkorrektur bei der computertomographie |
US7251307B2 (en) * | 2004-11-24 | 2007-07-31 | Wisconsin Alumni Research Foundation | Fan-beam and cone-beam image reconstruction using filtered backprojection of differentiated projection data |
US7613275B2 (en) * | 2005-12-19 | 2009-11-03 | General Electric Company | Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions |
JP5161888B2 (ja) * | 2006-11-24 | 2013-03-13 | 株式会社東芝 | 円状及び直線状軌道を用いた医用撮像における断層撮影法の再構成のための方法及びシステム |
JP5525706B2 (ja) * | 2007-07-25 | 2014-06-18 | 株式会社東芝 | X線コンピュータ断層撮影装置 |
JP2010022576A (ja) * | 2008-07-18 | 2010-02-04 | Toshiba Corp | X線コンピュータ断層撮影装置および画像再構成方法 |
DE102009009617B4 (de) * | 2009-02-19 | 2019-04-25 | Siemens Healthcare Gmbh | Verfahren und Vorrichtung zur Verbesserung der Bildqualität bei einer Bildbestimmung durch iterative Rekonstruktion |
US8787646B2 (en) * | 2009-03-26 | 2014-07-22 | Koninklijke Philips N.V. | Method and apparatus for computed tomography image reconstruction |
US8731266B2 (en) * | 2009-12-17 | 2014-05-20 | General Electric Company | Method and system for correcting artifacts in image reconstruction |
US8805037B2 (en) * | 2011-05-31 | 2014-08-12 | General Electric Company | Method and system for reconstruction of tomographic images |
JP6067290B2 (ja) * | 2011-09-13 | 2017-01-25 | 旭化成株式会社 | メタマテリアル転写用積層体及びメタマテリアル被転写基材の製造方法 |
US8731269B2 (en) * | 2011-10-19 | 2014-05-20 | Kabushiki Kaisha Toshiba | Method and system for substantially reducing artifacts in circular cone beam computer tomography (CT) |
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US9558569B2 (en) | 2017-01-31 |
US20160048983A1 (en) | 2016-02-18 |
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