JP4498023B2 - X線ct装置 - Google Patents
X線ct装置 Download PDFInfo
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- JP4498023B2 JP4498023B2 JP2004177404A JP2004177404A JP4498023B2 JP 4498023 B2 JP4498023 B2 JP 4498023B2 JP 2004177404 A JP2004177404 A JP 2004177404A JP 2004177404 A JP2004177404 A JP 2004177404A JP 4498023 B2 JP4498023 B2 JP 4498023B2
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- 238000003384 imaging method Methods 0.000 claims description 17
- 238000013170 computed tomography imaging Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 10
- 238000002591 computed tomography Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002546 full scan Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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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
- A61B6/58—Testing, adjusting or calibrating thereof
- A61B6/582—Calibration
- A61B6/583—Calibration using calibration phantoms
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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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
-
- 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
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4064—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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- 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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Optics & Photonics (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- High Energy & Nuclear Physics (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
図1は実施例1によるX線CTシステムの構成図である。患者である被写体Sを挟んでX線源11とX線検出器12が配置され、X線源11には撮影システム制御部13の出力が、X線発生制御部14を介して接続されている。また、X線検出器12の出力は画像入力部15を介して撮影システム制御部13に接続されている。更に、撮影システム制御部13には、画像処理部16、画像保存部17、診断モニタ18、操作部19、ネットワーク20が接続されており、ネットワーク20にはプリンタ21、診断ワークステーション22、画像データベース23が接続されている。
12 X線検出器
13 撮影システム制御部
14 X線発生制御部
15 画像入力部
16 画像処理部
17 画像保存部
18 診断モニタ
19 操作部
Claims (6)
- X線撮影により投影データを得るX線CT撮影において、サイノグラムより投影角度ごとに該投影角度の投影データと対向する投影データの整合性の度合いを求める演算手段と、該演算手段で得られた前記整合性の度合いを用いて、前記投影角度の有効範囲を決定する決定手段と、該決定手段で決定した前記有効範囲内の前記投影データを用いて再構成し断層画像を得る断層画像形成手段とから成ることを特徴とするX線CT装置。
- 前記整合性の度合いは、前記投影データと前記対向する投影データ間の誤差の評価量としたことを特徴とする請求項1に記載のX線CT装置。
- 前記対向する投影データは補間により作成して求めることを特徴とする請求項1に記載のX線CT装置。
- 前記有効範囲の決定は、前記投影データと対向する前記投影データの整合性の度合いが基準内である範囲を求め、該基準内範囲から前記投影角度の有効範囲を決定することを特徴とする請求項1又は2又は3に記載のX線CT装置。
- 前記X線撮影と並行して前記投影角度の有効範囲の判定を行い、前記投影角度の有効範囲がファン角度に180度を加えた角度未満の場合には、前記X線撮影を中断するようにしたことを特徴とする請求項1〜4の何れか1つの請求項に記載のX線CT装置。
- 前記有効範囲内において前記投影データが重複している場合には、重複している投影データの重みを調整することを特徴とする請求項1〜5の何れか1つの請求項に記載のX線CT装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004177404A JP4498023B2 (ja) | 2004-06-15 | 2004-06-15 | X線ct装置 |
US11/140,898 US7145979B2 (en) | 2004-06-15 | 2005-06-01 | X-ray CT image taking apparatus and X-ray CT image taking method |
DE602005019497T DE602005019497D1 (de) | 2004-06-15 | 2005-06-07 | Bildaufnahmevorrichtung und Bildaufnahmeverfahren für Röntgencomputertomographie |
EP05012234A EP1609419B1 (en) | 2004-06-15 | 2005-06-07 | X-ray CT image taking apparatus and X-ray CT image taking method |
CNB2005100780911A CN100524018C (zh) | 2004-06-15 | 2005-06-14 | X射线ct装置和x射线ct摄影方法 |
KR1020050051354A KR100684303B1 (ko) | 2004-06-15 | 2005-06-15 | 엑스선 씨티 촬영장치 및 엑스선 씨티 촬영방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004177404A JP4498023B2 (ja) | 2004-06-15 | 2004-06-15 | X線ct装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006000224A JP2006000224A (ja) | 2006-01-05 |
JP4498023B2 true JP4498023B2 (ja) | 2010-07-07 |
Family
ID=35116015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004177404A Expired - Fee Related JP4498023B2 (ja) | 2004-06-15 | 2004-06-15 | X線ct装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7145979B2 (ja) |
EP (1) | EP1609419B1 (ja) |
JP (1) | JP4498023B2 (ja) |
KR (1) | KR100684303B1 (ja) |
CN (1) | CN100524018C (ja) |
DE (1) | DE602005019497D1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4438053B2 (ja) * | 2004-05-11 | 2010-03-24 | キヤノン株式会社 | 放射線撮像装置、画像処理方法及びコンピュータプログラム |
JP2006000225A (ja) * | 2004-06-15 | 2006-01-05 | Canon Inc | X線ct装置 |
JP4769441B2 (ja) * | 2004-08-19 | 2011-09-07 | キヤノン株式会社 | 画像処理装置及び画像処理方法 |
JP4585815B2 (ja) * | 2004-09-03 | 2010-11-24 | キヤノン株式会社 | 情報処理装置、撮影システム、吸収係数補正方法、及びコンピュータプログラム |
US7515917B2 (en) | 2005-07-12 | 2009-04-07 | Qwest Communications International Inc. | Efficiently determining the location of a mobile communications device system and methods |
KR100837750B1 (ko) * | 2006-08-25 | 2008-06-13 | 엔에이치엔(주) | 성조를 이용하여 중국어를 검색하는 방법 및 상기 방법을수행하는 시스템 |
JP2008253569A (ja) * | 2007-04-05 | 2008-10-23 | Rigaku Corp | 異常体動検出装置および異常体動検出方法 |
JP5366390B2 (ja) * | 2007-11-06 | 2013-12-11 | 株式会社東芝 | X線撮影装置 |
FR2924325B1 (fr) | 2007-12-03 | 2010-11-26 | Trophy | Appareil de radiologie dentaire et procede associe. |
DE102009009617B4 (de) * | 2009-02-19 | 2019-04-25 | Siemens Healthcare Gmbh | Verfahren und Vorrichtung zur Verbesserung der Bildqualität bei einer Bildbestimmung durch iterative Rekonstruktion |
WO2010128404A1 (en) | 2009-05-04 | 2010-11-11 | Trophy | Combined panoramic and computed tomography apparatus |
JP2011136027A (ja) * | 2009-12-28 | 2011-07-14 | Nihon Univ | X線ct撮影装置、再構成処理方法 |
EP4201304A1 (en) * | 2012-10-24 | 2023-06-28 | Nidek Co., Ltd. | Ophthalmic analysis apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0449952A (ja) * | 1990-06-14 | 1992-02-19 | Toshiba Corp | X線ct装置 |
JP2002360560A (ja) * | 2001-05-16 | 2002-12-17 | Siemens Ag | コンピュータトモグラフによる像の作成方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5270923A (en) * | 1989-11-02 | 1993-12-14 | General Electric Company | Computed tomographic image reconstruction method for helical scanning using interpolation of partial scans for image construction |
US5216601A (en) | 1989-11-22 | 1993-06-01 | General Electric Company | Method for fan beam helical scanning using rebinning |
JP2760781B2 (ja) * | 1996-01-31 | 1998-06-04 | 株式会社東芝 | X線断層撮影装置 |
US5671263A (en) * | 1996-03-13 | 1997-09-23 | Analogic Corporation | Motion artifact suppression filter for use in computed tomography systems |
US5708690A (en) * | 1996-10-11 | 1998-01-13 | General Electric Company | Methods and apparatus for helical image reconstruction in a computed tomography fluoro system |
US5960056A (en) * | 1997-07-01 | 1999-09-28 | Analogic Corporation | Method and apparatus for reconstructing volumetric images in a helical scanning computed tomography system with multiple rows of detectors |
JP3124254B2 (ja) * | 1997-07-24 | 2001-01-15 | ジーイー横河メディカルシステム株式会社 | 放射線断層撮影装置 |
US6108575A (en) * | 1998-02-20 | 2000-08-22 | General Electric Company | Helical weighting algorithms for fast reconstruction |
US6535570B2 (en) * | 1999-06-17 | 2003-03-18 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Method for tracing organ motion and removing artifacts for computed tomography imaging systems |
US6324247B1 (en) * | 1999-12-30 | 2001-11-27 | Ge Medical Systems Global Technology Company, Llc | Partial scan weighting for multislice CT imaging with arbitrary pitch |
JP4282302B2 (ja) * | 2001-10-25 | 2009-06-17 | 株式会社東芝 | X線ct装置 |
US6879656B2 (en) | 2002-07-23 | 2005-04-12 | General Electric Company | Method and apparatus for deriving motion information from projection data |
-
2004
- 2004-06-15 JP JP2004177404A patent/JP4498023B2/ja not_active Expired - Fee Related
-
2005
- 2005-06-01 US US11/140,898 patent/US7145979B2/en not_active Expired - Fee Related
- 2005-06-07 DE DE602005019497T patent/DE602005019497D1/de active Active
- 2005-06-07 EP EP05012234A patent/EP1609419B1/en not_active Expired - Fee Related
- 2005-06-14 CN CNB2005100780911A patent/CN100524018C/zh not_active Expired - Fee Related
- 2005-06-15 KR KR1020050051354A patent/KR100684303B1/ko not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0449952A (ja) * | 1990-06-14 | 1992-02-19 | Toshiba Corp | X線ct装置 |
JP2002360560A (ja) * | 2001-05-16 | 2002-12-17 | Siemens Ag | コンピュータトモグラフによる像の作成方法 |
Also Published As
Publication number | Publication date |
---|---|
KR100684303B1 (ko) | 2007-02-20 |
US20050276371A1 (en) | 2005-12-15 |
EP1609419A1 (en) | 2005-12-28 |
DE602005019497D1 (de) | 2010-04-08 |
CN100524018C (zh) | 2009-08-05 |
CN1713073A (zh) | 2005-12-28 |
JP2006000224A (ja) | 2006-01-05 |
EP1609419B1 (en) | 2010-02-24 |
US7145979B2 (en) | 2006-12-05 |
KR20060049601A (ko) | 2006-05-19 |
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