JP2015057606A - 放射線走査結像用設備及び方法 - Google Patents
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- 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
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- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4007—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units
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- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4007—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units
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Abstract
【解決手段】複数の放射線発生器11と放射線検知装置12とを含むことができる。複数の放射線発生器12は円弧に沿って均一に分布し、且つ1つの走査周期において、複数の放射線発生器11は順に又は同時に被検体へ放射線ビームを放出する。放射線検知装置12は、複数の放射線検知器リニアアレイで構成される多段式半封止構造であってもよく、円弧状構造であってもよい。その上には、円弧に沿って均一に分布する複数の放射線検知ユニットが設けられている。検査の全過程において、該設備は回動する必要がなく、完全な放射線投影数値を迅速に取得することができ、検査用時間を効果的に減少させる。
【選択図】図1
Description
等角構造:即ち複数の検知ユニットは円弧状に配列され、それぞれの検知ユニットに対応する放射線の間の夾角が等しい;
等距離構造:即ち複数の検知ユニットは直線状に配列され、それぞれの検知ユニットの間の距離が等しく、且つ、放射線発生器から放出される放射線ビームの中軸線が、複数の検知ユニットによって形成される直線に垂直する。直線形放射線ビーム群を採用する場合、上記再建方法に類似する方法によって再建を行なうことができ、ここでは贅言しない。
Claims (11)
前記複数の放射線発生器から放出された放射線ビームの放射線投影数値を採集する放射線検知装置とを含む、
ことを特徴とする放射線走査結像用設備。
ことを特徴とする請求項1に記載の設備。
前記放射線検知装置は複数の放射線検知ユニットを含み、全ての前記放射線発生ユニットに対応する放射線検知ユニットは重ならない、
ことを特徴とする請求項1に記載の設備。
前記放射線発生ユニットは前記放射線検知ユニットに逐一に対応し、全ての前記放射線検知ユニットが取得する放射線検出数値は平行ビーム投影数値を構成する、
ことを特徴とする請求項3に記載の設備。
ことを特徴とする請求項4に記載の設備。
ことを特徴とする請求項1に記載の設備。
前記結像ユニットは、前記平行ビーム投影数値に対して二重エネルギー分解処理を行うことにより、異なる基質材料の二重エネルギー分解係数を取得し、且つフィルタ逆投影アルゴリズムによって、前記異なる基質材料の二重エネルギー分解係数に対して二重エネルギー再建を行うことにより、被検体の画像を取得する、
ことを特徴とする請求項6に記載の設備。
前記結像ユニットは、前記二重エネルギー再建にて得られた被検体の原子番号及び電子密度分布を、前記データベースにおけるデータと比較することにより、被検体が疑わしい物品であるか否かを判断する、
ことを特徴とする請求項7に記載の設備。
複数の放射線検知器リニアアレイからなる放射線検知装置において、少なくとも1つの放射線発生器に対応する複数の放射線検知ユニットは、該放射線発生器から放出される放射線ビームの中軸線に垂直する直線を形成しておらず、前記少なくとも1つの放射線発生器毎に等距離型擬制検知器リニアアレイを設け、前記等距離型擬制検知器リニアアレイは、直線に沿って配列され且つ等距離に分布する複数の擬制検知ユニットを含み、それぞれの放射線発生器と相応の等距離型擬制検知器アレイとの距離が等しく、放射線発生器と放射線検知ユニットとの結線に基づき、前記擬制検知ユニットに対応する放射線検知ユニットを特定し、且つ該放射線検知ユニットの放射線検出数値に基づいて該擬制検知ユニットの放射線検出数値を取得し、全ての等距離型擬制検知器リニアアレイの放射線検出数値は等距離扇形ビーム投影数値を構成し、
円弧に沿って分布する複数の放射線検知ユニットで構成される放射線検知装置において、該装置が取得する放射線検出数値は、等距離扇形ビーム投影数値または平行ビーム投影数値を構成する;或いは
請求項1に記載の設備を用いて被検体を放射線走査して放射線検出数値を取得し、
円弧に沿って分布する複数の放射線検知ユニットで構成される放射線検知装置において、該装置が取得する放射線検出数値は平行ビーム投影数値を構成することを含む、
ことを特徴とする放射線走査結像用方法。
フィルタ逆投影アルゴリズムによって、前記異なる基質材料の二重エネルギー分解係数に対して二重エネルギー再建を行うことにより、被検体の画像を取得する、
ことを更に含むことを特徴とする請求項9に記載の方法。
ことを更に含むことを特徴とする請求項10に記載の方法。
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HK1188630A1 (zh) | 2014-05-09 |
JP5894243B2 (ja) | 2016-03-23 |
US9448325B2 (en) | 2016-09-20 |
EP2713156B1 (en) | 2020-05-06 |
EP2713156A1 (en) | 2014-04-02 |
JP5676049B2 (ja) | 2015-02-25 |
KR101654271B1 (ko) | 2016-09-05 |
KR20140120382A (ko) | 2014-10-13 |
CN103308535A (zh) | 2013-09-18 |
JP2014510288A (ja) | 2014-04-24 |
CN103308535B (zh) | 2016-04-13 |
EP2713156A4 (en) | 2015-07-29 |
US20140211917A1 (en) | 2014-07-31 |
RU2571170C1 (ru) | 2015-12-20 |
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