JP4711245B2 - 画像の三次元再構成の方法及びシステム - Google Patents
画像の三次元再構成の方法及びシステム Download PDFInfo
- Publication number
- JP4711245B2 JP4711245B2 JP2005188033A JP2005188033A JP4711245B2 JP 4711245 B2 JP4711245 B2 JP 4711245B2 JP 2005188033 A JP2005188033 A JP 2005188033A JP 2005188033 A JP2005188033 A JP 2005188033A JP 4711245 B2 JP4711245 B2 JP 4711245B2
- Authority
- JP
- Japan
- Prior art keywords
- projection
- ray
- projection data
- detector
- conjugate
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 30
- 238000002591 computed tomography Methods 0.000 claims description 22
- 238000003384 imaging method Methods 0.000 claims description 15
- 238000013170 computed tomography imaging Methods 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/06—Topological mapping of higher dimensional structures onto lower dimensional surfaces
- G06T3/073—Transforming surfaces of revolution to planar images, e.g. cylindrical surfaces to planar images
-
- 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
- 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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/027—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- General Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- High Energy & Nuclear Physics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Image Analysis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Image Processing (AREA)
Description
(Δ/(1−Δ′+Δ))p(γ,β,i+1)+((1−Δ′)/(1−Δ′+Δ))p(−γ,β+π,i′), Δ>Δ′ (2)
尚、線形補間が用いられているが、様々な実施形態がこのように限定されているのではないことに注意されたい。例えば、所望に応じて又は必要に応じてLagrange補間及び他の形式の補間を実行してよい。
12 ガントリ
14 X線管(X線源)
16 X線ビーム
18 検出器アレイ
20 検出器素子
22 患者
24 回転中心
26 制御機構
42 表示器
46 モータ式テーブル
48 ガントリ開口
50 命令取得装置
52 媒体
70 線源軌道
72(図4) 非傾斜平行投影
72(図5)、74 共役射線
78(図5) 射線
76、86 検出器
80、82 再構成ピクセル
100 逆投影処理
Claims (8)
- 回転する線源から投射されたビームにより対象を走査する撮像装置から受け取った投影データにおいて、投影射線の共役対に対応する投影データを識別するステップ(102)と、
前記共役対の各々の投影射線に対応する前記投影データ及び前記線源からの投影射線について前記投影データの整数部分及び分数部分を決定するステップと、
前記走査対象の画像を再構成するために、前記共役射線の分数部分の比較に基づいて前記投影射線の共役対に対応する前記投影データを補間するステップ(104、106、108)と、
を備えた対象の画像を再構成する方法(100)。 - 前記撮像装置は計算機式断層写真法撮像装置(10)である、請求項1に記載の方法(100)。
- 前記共役対は、投影角度に対して180°離隔した2本の投影射線により画定される、請求項1に記載の方法(100)。
- 前記共役対に対応する投影データを識別するステップは、ピクセル毎に投影データを決定するステップを含んでいる、請求項1に記載の方法(100)。
- 前記補間するステップは、
((1−Δ′)/(1−Δ′+Δ))p(γ,β,i)+(Δ/(1−Δ′+Δ))p(−γ,β+π,i′+1), Δ≦Δ′ (1)
(Δ/(1−Δ′+Δ))p(γ,β,i+1)+((1−Δ′)/(1−Δ′+Δ))p(−γ,β+π,i′), Δ>Δ′ (2)
による計算を実行するステップを含んでおり、式中、qは検出器列を定義し、γは検出器角度を定義し、βは投影角度を定義し、i及びi′はq及びq′の整数部分を示し、Δ及びΔ′はq及びq′の分数部分を示す、請求項1に記載の方法(100)。 - 対象に向けてビームを投射する、回転する線源及び、マルチ検出器を有する計算機式断層写真法(CT)撮像装置であって、
対象の走査から投影データを取得し、
投影射線の共役対に対応する投影データを識別し、
前記共役対の各々の投影射線に対応する前記投影データ及び前記線源からの投影射線について前記投影データの整数部分及び分数部分を決定し、
前記走査対象の画像を再構成するために、前記共役射線の分数部分の比較に基づいて前記投影射線の共役対に対応する前記投影データを補間するように構成されている計算機式断層写真法(CT)撮像装置。 - 前記補間されたデータを3次元逆投影して画像を生成するように構成されている、請求項6に記載の装置。
- 前記補間は、
((1−Δ′)/(1−Δ′+Δ))p(γ,β,i)+(Δ/(1−Δ′+Δ))p(−γ,β+π,i′+1), Δ≦Δ′ (1)
(Δ/(1−Δ′+Δ))p(γ,β,i+1)+((1−Δ′)/(1−Δ′+Δ))p(−γ,β+π,i′), Δ>Δ′ (2)
による計算を含んでおり、式中、qは検出器列を定義し、γは検出器角度を定義し、βは投影角度を定義し、i及びi′はq及びq′の整数部分を示し、Δ及びΔ′はq及びq′の分数部分を示す、請求項6に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/881,794 US7215734B2 (en) | 2004-06-30 | 2004-06-30 | Method and system for three-dimensional reconstruction of images |
US10/881,794 | 2004-06-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006015139A JP2006015139A (ja) | 2006-01-19 |
JP2006015139A5 JP2006015139A5 (ja) | 2008-08-07 |
JP4711245B2 true JP4711245B2 (ja) | 2011-06-29 |
Family
ID=35513915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005188033A Active JP4711245B2 (ja) | 2004-06-30 | 2005-06-28 | 画像の三次元再構成の方法及びシステム |
Country Status (4)
Country | Link |
---|---|
US (1) | US7215734B2 (ja) |
JP (1) | JP4711245B2 (ja) |
CN (1) | CN1722178A (ja) |
NL (1) | NL1029357C2 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060198491A1 (en) * | 2005-03-04 | 2006-09-07 | Kabushiki Kaisha Toshiba | Volumetric computed tomography system for imaging |
CN100348158C (zh) * | 2005-05-26 | 2007-11-14 | 西安理工大学 | Ct图像的快速渐进式直接体绘制三维重建方法 |
US8492762B2 (en) * | 2006-06-27 | 2013-07-23 | General Electric Company | Electrical interface for a sensor array |
ATE503237T1 (de) * | 2007-01-16 | 2011-04-15 | Tomtec Imaging Syst Gmbh | Verfahren und system zur graphischen darstellung dynamischer informationen |
CN101271526B (zh) * | 2008-04-22 | 2010-05-12 | 深圳先进技术研究院 | 一种图像处理中物体自动识别并三维重建的方法 |
DE102012217163B4 (de) | 2012-09-24 | 2022-06-02 | Siemens Healthcare Gmbh | Verfahren zur Rekonstruktion von CT-Bilddaten mit gewichteter Rückprojektion, einschließlich Recheneinheit und CT-System für dieses Verfahren |
CN103479379B (zh) * | 2013-09-06 | 2015-08-26 | 沈阳东软医疗***有限公司 | 一种倾斜螺旋扫描的图像重建方法及装置 |
CN105094725B (zh) * | 2014-05-14 | 2019-02-19 | 同方威视技术股份有限公司 | 图像显示方法 |
US10332252B2 (en) * | 2016-12-29 | 2019-06-25 | General Electric Company | Slope constrained cubic interpolation |
JP7202302B2 (ja) * | 2017-01-05 | 2023-01-11 | ゼネラル・エレクトリック・カンパニイ | 断層撮影再構成に使用するためのデータのディープラーニングに基づく推定 |
CN107016672B (zh) * | 2017-04-28 | 2020-06-26 | 上海联影医疗科技有限公司 | 医学扫描图像的重建方法和装置以及医学成像*** |
CN108364326B (zh) * | 2018-02-08 | 2021-04-02 | 中南大学 | 一种ct成像方法 |
CN110728624B (zh) * | 2019-09-29 | 2021-07-23 | 厦门大学 | 一种高分辨率扩散加权图像重建方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001510384A (ja) * | 1997-07-01 | 2001-07-31 | アナロジック コーポレーション | ヘリカルスキャンctを使用した立体画像の再構成 |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5394787A (en) | 1977-01-31 | 1978-08-19 | Toshiba Corp | Tomographic diagnostic equipment by radiation |
US4136388A (en) | 1977-08-26 | 1979-01-23 | U.S. Philips Corporation | Data acquisition system for computed tomography |
US4852132A (en) | 1985-08-30 | 1989-07-25 | Yokogawa Medical Systems | Method of collecting data for x-ray tomograph |
DE4334937A1 (de) | 1993-10-13 | 1995-10-05 | Siemens Ag | Computertomograph |
US5400379A (en) | 1994-02-25 | 1995-03-21 | General Electric Company | Multi-slice x-ray CT using a detector mask |
JP2914891B2 (ja) * | 1995-07-05 | 1999-07-05 | 株式会社東芝 | X線コンピュータ断層撮影装置 |
US5907592A (en) | 1995-10-31 | 1999-05-25 | Levinson; Reuven | Axially incremented projection data for spiral CT |
US5974108A (en) | 1995-12-25 | 1999-10-26 | Kabushiki Kaisha Toshiba | X-ray CT scanning apparatus |
DE19614223C1 (de) | 1996-04-10 | 1997-12-04 | Siemens Ag | Bildrekonstruktionsverfahren für Mehrzeilendetektor-Computertomographen im Spiralbetrieb |
JP3557567B2 (ja) | 1996-07-23 | 2004-08-25 | 株式会社日立メディコ | X線ct装置 |
IL119714A0 (en) | 1996-11-28 | 1997-02-18 | Elscint Ltd | CT system with oblique image planes |
US5712895A (en) | 1997-01-14 | 1998-01-27 | Picker International, Inc. | Rotational digital subtraction angiography phantom |
US5907594A (en) | 1997-07-01 | 1999-05-25 | Analogic Corporation | Reconstruction of volumetric images by successive approximation in cone-beam computed tomography systems |
DE19854939C2 (de) * | 1998-11-27 | 2001-11-22 | Siemens Ag | Verfahren und Gerät zur Erzeugung von CT-Bildern |
US6115445A (en) | 1999-01-12 | 2000-09-05 | Analogic Corporation | Progressive correction of ring artifacts in a computed tomography system |
US6343108B1 (en) | 1999-06-18 | 2002-01-29 | Philips Medical Systems (Cleveland), Inc. | Cone beam scanner using oblique surface reconstructions |
US6201849B1 (en) | 1999-08-16 | 2001-03-13 | Analogic Corporation | Apparatus and method for reconstruction of volumetric images in a helical scanning cone-beam computed tomography system |
US6256366B1 (en) | 1999-07-22 | 2001-07-03 | Analogic Corporation | Apparatus and method for reconstruction of volumetric images in a computed tomography system using sementation of slices |
US6327325B1 (en) * | 2000-02-16 | 2001-12-04 | Ge Medical Systems Global Technology Company, Llc | Methods and apparatus for adaptive interpolation reduced view CT scan |
US6351514B1 (en) * | 2000-06-22 | 2002-02-26 | Ge Medical Systems Global Technology Company, Llc | Slice-adaptive multislice helical weighting for computed tomography imaging |
US6389097B1 (en) | 2000-12-28 | 2002-05-14 | Ge Medical Systems Global Technology Company, Llc | Multi-plate volumetric CT scanner gap compensation method and apparatus |
US6529576B2 (en) | 2001-06-29 | 2003-03-04 | Ge Medical Systems Global Technology Company, Llc | Method and apparatus for pitch-adaptive reconstruction in multislice helical computed tomographic systems |
US6771732B2 (en) | 2002-02-28 | 2004-08-03 | The Board Of Trustees Of The University Of Illinois | Methods and apparatus for fast divergent beam tomography |
US6587537B1 (en) * | 2002-04-01 | 2003-07-01 | Ge Medical Systems Global Technology Company, Llc | Methods and apparatus for multi-slice image reconstruction |
US7062009B2 (en) * | 2002-09-12 | 2006-06-13 | Analogic Corporation | Helical interpolation for an asymmetric multi-slice scanner |
US6775346B2 (en) | 2002-10-21 | 2004-08-10 | Koninklijke Philips Electronics N.V. | Conebeam computed tomography imaging |
US6917663B2 (en) * | 2003-06-16 | 2005-07-12 | Kabushiki Kaisha Toshiba | Cone-beam reconstruction apparatus and computed tomography apparatus |
-
2004
- 2004-06-30 US US10/881,794 patent/US7215734B2/en active Active
-
2005
- 2005-06-28 NL NL1029357A patent/NL1029357C2/nl not_active IP Right Cessation
- 2005-06-28 JP JP2005188033A patent/JP4711245B2/ja active Active
- 2005-06-30 CN CNA2005100922876A patent/CN1722178A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001510384A (ja) * | 1997-07-01 | 2001-07-31 | アナロジック コーポレーション | ヘリカルスキャンctを使用した立体画像の再構成 |
Also Published As
Publication number | Publication date |
---|---|
US20060002507A1 (en) | 2006-01-05 |
NL1029357A1 (nl) | 2006-01-02 |
JP2006015139A (ja) | 2006-01-19 |
NL1029357C2 (nl) | 2008-07-15 |
CN1722178A (zh) | 2006-01-18 |
US7215734B2 (en) | 2007-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4711245B2 (ja) | 画像の三次元再構成の方法及びシステム | |
US6944260B2 (en) | Methods and apparatus for artifact reduction in computed tomography imaging systems | |
JP4644785B2 (ja) | コーンビームct画像再構成におけるアーチファクトを低減するための方法及び装置 | |
US6452996B1 (en) | Methods and apparatus utilizing generalized helical interpolation algorithm | |
US7865006B2 (en) | Methods and apparatus for artifact reduction | |
IL157069A (en) | Methods and apparatus for weighting of computed tomography data | |
US6904117B2 (en) | Tilted gantry helical cone-beam Feldkamp reconstruction for multislice CT | |
US6775347B2 (en) | Methods and apparatus for reconstructing an image of an object | |
JP2002085398A (ja) | 高速ct撮像における螺旋加重のための方法及び装置 | |
JPH10146331A (ja) | 対象物の関心ある領域の3次元コンピュータトモグラフ撮影のための走査及びデータ取得方法および装置 | |
US6954516B2 (en) | Imaging systems and methods | |
JPH09182745A (ja) | 計算機式断層撮影装置 | |
JP4460853B2 (ja) | マルチスライス画像再構成のための方法及び装置 | |
WO2007004196A2 (en) | Exact fbp type algorithm for arbitrary trajectories | |
US6999550B2 (en) | Method and apparatus for obtaining data for reconstructing images of an object | |
US20060078185A1 (en) | Methods and apparatus for image reconstruction | |
US20120275561A1 (en) | Methods and apparatus for ct smoothing to reduce artifacts | |
JP2018143574A (ja) | X線ct装置及び画像処理方法 | |
JP2006527618A (ja) | 余剰な測定値を使用するコンピュータ断層撮影法 | |
US6866419B2 (en) | Methods and apparatus for motion correction in imaging systems | |
US7539281B2 (en) | Methods and apparatus for reconstruction in helical cone beam volumetric CT | |
US7173996B2 (en) | Methods and apparatus for 3D reconstruction in helical cone beam volumetric CT | |
JP2004089720A (ja) | X線コンピュータ断層撮影装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080620 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080620 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20101110 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101130 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110125 |
|
RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20110125 |
|
RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20110125 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110222 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110314 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4711245 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |