JP2017534361A - 蛍光媒介光電式容積脈波記録法を用いた組織中の絶対血流の定量化 - Google Patents
蛍光媒介光電式容積脈波記録法を用いた組織中の絶対血流の定量化 Download PDFInfo
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Abstract
Description
ΔLは、所与の組織体内の凝縮した血液層の厚さの変化、Ieは、血液中の蛍光剤を励起させる励起光の強度、Φは、蛍光剤の量子効率、Imは、組織体を通る血液の拍動流の拡張期最小期間の経時変化する光強度信号の強度、Ipは、組織体を通る血液の拍動流の収縮期最大期間の経時変化する光強度信号の強度、εは、蛍光剤のモル吸光係数、Cは、血液中の蛍光剤の瞬間モル濃度、を得る。
ΔLは、所与の組織体内の凝縮した血液層の厚さの変化、Ieは、蛍光剤を励起させる励起光の強度、Φは、蛍光剤の量子効率、Imは、組織体を通る血液の拍動流の拡張期最小期間の経時変化する光強度信号の強度、Ipは、組織体を通る血液の拍動流の収縮期最大期間の経時変化する光強度信号の強度、εは、蛍光剤のモル吸光係数、Cは、血液中の蛍光剤の瞬間モル濃度である。
方法の実施形態と関連して記載した通りを得る。
Claims (21)
- 組織体内の血液量の経時変化を測定するための装置であって、前記装置は、
血液中の蛍光剤を励起させる手段と、
前記組織体を通る前記血液の拍動流の間に、経時変化する光強度信号を取得する手段であって、前記拍動流は拡張期と収縮期とを有し、従来の光電式容積脈波記録法に類似している、手段と、
前記組織体内の前記血液量の前記経時変化の測定を得るために、前記取得された経時変化する光強度信号を処理する手段と、を備え、
修正ベール・ランベルトの法則を、前記拡張期及び前記収縮期に適用して、
ΔLは、所与の組織体内の凝縮した血液層の厚さの変化、
Ieは、前記血液中の前記蛍光剤を励起させる励起光の強度、
Φは、前記蛍光剤の量子効率、
Imは、前記組織体を通る前記血液の前記拍動流の前記拡張期最小期間の前記経時変化する光強度信号の強度、
Ipは、前記組織体を通る前記血液の前記拍動流の前記収縮期最大期間の前記経時変化する光強度信号の強度、
εは、前記蛍光剤のモル吸光係数、
Cは、前記血液中の前記蛍光剤の瞬間モル濃度、
を得る、装置。 - 前記励起させる手段は、蛍光励起源を有する照明モジュールを含み、前記蛍光励起源は、前記蛍光剤を励起させるのに適した強度及び適した波長を有する励起光を生成するよう構成される、請求項1に記載の装置。
- 前記蛍光励起源が、第1の励起源と第2の励起源とを含む、請求項2に記載の装置。
- 前記照明モジュールは、前記照明モジュールから出る前記励起光を成形し、ガイドするように構成される光学素子をさらに含み、前記対象の前記組織体を含む注目領域に亘り一様な前記励起光の場を与える、請求項2または3に記載の装置。
- 前記光学素子は、レンズ、光ガイド、回折格子、またはそれらの組み合わせを含む、請求項4に記載の装置。
- 前記取得する手段は、画像センサを含む蛍光放射取得モジュールを含む、請求項1から5のいずれか一項に記載の装置。
- 前記蛍光放射取得モジュールは、前記蛍光剤によって生成された前記経時変化する光強度信号を、前記画像センサに対して捕捉し、フィルタリングし、方向付けるように構成された前記画像センサの前面に配置された光学素子をさらに含む、請求項6に記載の装置。
- 前記処理する手段は、プロセッサモジュールを含み、前記プロセッサモジュールは、前記蛍光剤に前記経時変化する光強度信号を生成させる前記手段の動作、前記経時変化する光強度信号を取得する前記手段の動作、またはそれらの組み合わせを制御するように構成される、請求項1から7のいずれか一項に記載の装置。
- 請求項1から8のいずれか一項に記載の装置と、蛍光剤とを含む、組織体内の血液量の経時変化を測定するためのキット。
- 組織体内の血液量の経時変化を測定するための方法であって、前記方法は、
前記血液中の蛍光剤を励起させることと、
前記組織体を通る前記血液の拍動流の間に、経時変化する光強度信号を取得することであって、前記拍動流は拡張期と収縮期とを有し、従来の光電式容積脈波記録法に類似している、取得することと、
前記組織体内の前記血液量の前記経時変化の測定を得るために、前記取得された経時変化する光強度信号を処理することと、を含み、
修正ベール・ランベルトの法則を、前記拡張期及び前記収縮期に適用して、
ΔLは、所与の組織体内の凝縮した血液層の厚さの変化、
Ieは、前記血液中の前記蛍光剤を励起させる励起光の強度、
Φは、前記蛍光剤の量子効率、
Imは、前記組織体を通る前記血液の前記拍動流の前記拡張期最小期間の前記経時変化する光強度信号の強度、
Ipは、前記組織体を通る前記血液の前記拍動流の前記収縮期最大期間の前記経時変化する光強度信号の強度、
εは、前記蛍光剤のモル吸光係数、
Cは、前記血液中の前記蛍光剤の瞬間モル濃度、
を得る、方法。 - Cは、前記蛍光剤の蛍光放射スペクトルにおける濃度媒介変化を利用することによって決定される、請求項10に記載の方法、または、請求項1から8のいずれか一項に記載の装置、または、請求項9に記載のキット。
- 前記濃度媒介変化は、前記蛍光剤の前記蛍光放射スペクトルにおけるスペクトルシフトを含む、請求項11に記載の方法、装置、または、キット。
- 前記利用することは、
前記蛍光剤の前記蛍光放射スペクトルにおける第1及び第2のスペクトル帯域を選択することと、
前記第1及び第2のスペクトル帯域のそれぞれについての波長で積分した蛍光放射の第1及び第2の強度を取得することと、
前記第1及び第2の強度の比率を計算することと、
前記比率からCの値を導出することと、を含む、請求項11または12に記載の方法、装置、または、キット。 - 前記第1及び第2のスペクトル帯域を選択することは、
(i)前記第1及び第2の強度の一方はCと共に単調に変化し、前記第1及び第2の強度の一方はCと共に変化しない
(ii)前記第1及び第2の強度はCと共に単調増加するが、異なる速度である、または
(iii)前記第1の強度はCと共に単調増加し、前記第2の強度はCと共に単調減少する、ものである請求項13に記載の方法、装置、または、キット。 - 前記第1のスペクトル帯域は、約780nmから約835nmまで、または、その一部分の範囲の波長を含み、前記第2のスペクトル帯域は、約835nmから約1000nmまで、または、その一部分の範囲の波長を含む、請求項13または14に記載の方法、装置、または、キット。
- 前記蛍光剤は、インドシアニングリーン(ICG)である、請求項1から8のいずれか一項に記載の装置、請求項9に記載のキット、または、請求項10から15のいずれか一項に記載の方法。
- Cは約2μMから約10mMの範囲である、請求項16に記載の方法、装置、または、キット。
- 対象の組織体内の血液量の経時変化を測定する方法において使用するための蛍光剤であって、前記方法は、
前記血液中の蛍光剤を励起させることと、
前記組織体を通る前記血液の拍動流の間に、経時変化する光強度信号を取得することであって、前記拍動流は拡張期と収縮期とを有し、従来の光電式容積脈波記録法に類似している、取得することと、
前記組織体内の前記血液量の前記経時変化の測定を得るために、前記取得された経時変化する光強度信号を処理することと、を含み、
修正ベール・ランベルトの法則を、前記拡張期及び前記収縮期に適用して、
ΔLは、所与の組織体内の凝縮した血液層の厚さの変化、
Ieは、前記血液中の前記蛍光剤を励起させる励起光の強度、
Φは、前記蛍光剤の量子効率、
Imは、前記組織体を通る前記血液の前記拍動流の前記拡張期最小期間の前記経時変化する光強度信号の強度、
Ipは、前記組織体を通る前記血液の前記拍動流の前記収縮期最大期間の前記経時変化する光強度信号の強度、
εは、前記蛍光剤のモル吸光係数、
Cは、前記血液中の前記蛍光剤の瞬間モル濃度、
を得る、蛍光剤。 - 前記蛍光剤は、インドシアニングリーン(ICG);フルオレセインイソチオシアネート; ローダミン、フィコエリトリン;フィコシアニン;アロフィコシアニン; オルトフタルアルデヒド; フルオレサミン; ローズベンガル; トリパンブルー; フルオロゴールドから成る前記群より選択される、1または複数の蛍光色素、または類似体、またはその誘導体を含む、請求項18に記載の蛍光剤。
- 前記方法は、前記対象に前記蛍光剤を投与する前記ステップを含む、請求項18または19に記載の蛍光剤。
- 前記方法は、前記組織体内の前記血液量の前記経時変化の測定を、生理学的パラメータ、診断パラメータ、病理学的パラメータ、または、それらの組み合わせに相関させることを含む、請求項18から20のいずれか一項に記載の蛍光剤。
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EP3203902A4 (en) | 2018-06-20 |
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AU2014408488A1 (en) | 2017-04-20 |
EP3915467A1 (en) | 2021-12-01 |
AU2019250179A1 (en) | 2019-11-07 |
US12036011B2 (en) | 2024-07-16 |
AU2014408488B2 (en) | 2019-07-18 |
CA2963450A1 (en) | 2016-04-14 |
KR101955134B1 (ko) | 2019-03-06 |
KR20190022940A (ko) | 2019-03-06 |
CN107427247A (zh) | 2017-12-01 |
WO2016055837A1 (en) | 2016-04-14 |
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JP6487544B2 (ja) | 2019-03-20 |
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