JP6833467B2 - X線コンピュータ断層撮影装置 - Google Patents
X線コンピュータ断層撮影装置 Download PDFInfo
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- JP6833467B2 JP6833467B2 JP2016222301A JP2016222301A JP6833467B2 JP 6833467 B2 JP6833467 B2 JP 6833467B2 JP 2016222301 A JP2016222301 A JP 2016222301A JP 2016222301 A JP2016222301 A JP 2016222301A JP 6833467 B2 JP6833467 B2 JP 6833467B2
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- 238000002591 computed tomography Methods 0.000 title claims description 44
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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]
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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
- A61B6/5205—Devices using data or image processing specially adapted for radiation diagnosis involving processing of raw data to produce diagnostic data
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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
- A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
- A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
- A61B6/5235—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image combining images from the same or different ionising radiation imaging techniques, e.g. PET and 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
- A61B6/52—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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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
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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
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/545—Control of apparatus or devices for radiation diagnosis involving automatic set-up of acquisition parameters
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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
- A61B6/46—Arrangements for interfacing with the operator or the patient
- A61B6/461—Displaying means of special interest
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Description
図4は、実施例1に係るシステム制御機能121の制御の下に行われるX線コンピュータ断層撮影装置の処理の典型的な流れを示す図である。
次に実施例2について説明する。実施例2は、検査プロトコルとしてX線検出器15のチャンネル方向に関する検出器分解能が設定された場合に特化する。
Claims (5)
- 被検体に照射するX線を発生するX線管と、当該被検体を透過したX線を検出するX線検出器と、前記X線検出器により検出されたX線に関する投影データを収集するデータ収集回路とを有する架台と、
検査プロトコルを設定する設定部と、
前記検査プロトコルに対応する投影データの収集ビュー数と再構成ビュー数とを決定する決定部と、
前記架台を制御して決定された前記収集ビュー数の投影データを収集する制御部と、
前記制御部にて収集された前記収集ビュー数の投影データに基づいて前記再構成ビュー数の投影データを算出する前処理部と、
前記再構成ビュー数の投影データに基づいてCT画像を再構成する再構成部と、
を具備し、
前記決定部は、単位時間当たりの収集ビュー数の不足に起因する偽像成分、1収集ビュー当たりの入射フォトン数の不足に起因する偽像成分及び収集ビュー数から再構成ビュー数への増加に起因する偽像成分の総合評価に基づいて、前記設定された検査プロトコルに対応する前記収集ビュー数と前記再構成ビュー数とを決定する、
X線コンピュータ断層撮影装置。 - 検査プロトコル各々について、単位時間当たりの収集ビュー数の不足に起因する偽像成分、1収集ビュー当たりの入射フォトン数の不足に起因する偽像成分及び収集ビュー数から再構成ビュー数への増加に起因する偽像成分の総合評価に基づいて決定された収集ビュー数と再構成ビュー数とを関連づけて記憶する記憶部を更に備え、
前記決定部は、前記設定された検査プロトコルに関連づけられた前記収集ビュー数と前記再構成ビュー数とを決定する、
請求項1記載のX線コンピュータ断層撮影装置。 - 前記検査プロトコルは、X線検出器のチャンネル方向に関する分解能、前記架台の回転速度、FOVのサイズ、CT画像に対する後処理の種類、再構成法、再構成関数及びX線条件の少なくとも一つのパラメータを含む、請求項2記載のX線コンピュータ断層撮影装置。
- 前記検査プロトコルは、前記分解能に関し、通常分解能モードと前記通常分解能モードに比して分解能が高い高精細モードとを含む、請求項3記載のX線コンピュータ断層撮影装置。
- 前記前処理部は、前記収集ビュー数の投影データにビュー補間を施すことにより前記再構成ビュー数の投影データを算出する、請求項1記載のX線コンピュータ断層撮影装置。
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JP2016222301A JP6833467B2 (ja) | 2016-11-15 | 2016-11-15 | X線コンピュータ断層撮影装置 |
US15/801,476 US10945683B2 (en) | 2016-11-15 | 2017-11-02 | X-ray computed tomography apparatus |
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JP2020210104A Division JP7141441B2 (ja) | 2020-12-18 | 2020-12-18 | X線コンピュータ断層撮影装置 |
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US11241207B2 (en) * | 2017-08-17 | 2022-02-08 | The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | Hybrid CT system with additional detectors in close proximity to the body |
JP7321798B2 (ja) * | 2019-06-28 | 2023-08-07 | キヤノンメディカルシステムズ株式会社 | 再構成装置及び放射線診断装置 |
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JP3583836B2 (ja) * | 1995-08-28 | 2004-11-04 | 株式会社日立メディコ | ビュー数変換手段を備えたx線ct装置 |
US6285732B1 (en) * | 1999-11-16 | 2001-09-04 | General Electric Company | Methods and apparatus for adaptive interpolation reduced view CT scan |
US6438195B1 (en) | 2001-01-26 | 2002-08-20 | Ge Medical Systems Global Technology Company, Llc | Methods and apparatus for compensating for view aliasing artifacts |
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US6895077B2 (en) * | 2001-11-21 | 2005-05-17 | University Of Massachusetts Medical Center | System and method for x-ray fluoroscopic imaging |
US6459755B1 (en) * | 2002-02-26 | 2002-10-01 | Ge Medical Systems Global Technology Co. Llc | Method and apparatus for administering low dose CT scans |
US7245694B2 (en) * | 2005-08-15 | 2007-07-17 | Hologic, Inc. | X-ray mammography/tomosynthesis of patient's breast |
JP5662467B2 (ja) * | 2009-12-04 | 2015-01-28 | アナロジック コーポレーション | 4分の1検出器オフセットを使用する高解像度ニューテートスライス再構成の方法及びシステム |
JP5728304B2 (ja) | 2011-06-21 | 2015-06-03 | 株式会社日立メディコ | X線ct装置及び画像再構成方法 |
US8724876B2 (en) * | 2011-10-18 | 2014-05-13 | Kabushiki Kaisha Toshiba | Method and system for substantially reducing streak artifacts in helical cone beam computer tomography (CT) |
JP6068027B2 (ja) * | 2012-07-06 | 2017-01-25 | 東芝メディカルシステムズ株式会社 | X線ct装置 |
JP2015208601A (ja) | 2014-04-30 | 2015-11-24 | 株式会社日立メディコ | X線ct装置、画像処理装置、及び投影データ生成方法 |
JPWO2016080311A1 (ja) * | 2014-11-21 | 2017-08-31 | 株式会社日立製作所 | X線ct装置、投影データのアップサンプリング方法、及び画像再構成方法 |
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