JP2010505582A - インドシアニングリーン血中濃度力学を使用した組織潅流分析システム - Google Patents
インドシアニングリーン血中濃度力学を使用した組織潅流分析システム Download PDFInfo
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Abstract
Description
以下、本発明を詳しく説明する。
1)光探知機からの信号を入力受けるための入力手段、2)前記入力された信号を関心地域での時間による蛍光強度で処理するための数値化手段、3)前記数値から組織の部位別に潅流程度を求めるための潅流程度演算手段及び、4)前記演算結果を出力するための出力手段で構成される。
1)生体内にインドシアニングリーン(ICG)を注射して、光源を使用して前記生体に光を照査した後、光探知機を使用して前記生体から発生される蛍光強度を測定することで、ICG濃度が充分に低くなる時間まで連続的にICG濃度を探知する工程、
2)時間によって探知された連続的な生体内ICG濃度変化を分析して、部位別に時間別ICG蛍光強度を数値化する、データ処理工程、及び
3)前記数値化されたデータから潅流程度を計算する工程とを含む組織潅流程度の測定方法を提供する。
<比較例1>ドップラー映像術による組織壊死予測
本発明者の実験データである図1の左側の図三つは、血液潅流低下モデルを作るためにネズミの片方の足の大腿部動脈と静脈を除去する手術の1〜4日後に、レーザードップラー映像術で得たデータであり、右側の図は、各々の一週間後の足組織の壊死程度を示している。組織の壊死程度は、Aの場合全くなく、Bは足裏の中間、Cは足首まで進行していて、壊死程度は組織の潅流程度と比例するが(Helisch,A.等,Arterioscler.Thromb.Vasc.Biol.,2006年,第26卷,520−526頁、Aは正常の160%、Bは正常の20%、Cは正常の5%の潅流)、各々に該当するレーザードップラー映像術データは、全く各個体間の組織潅流の差を示すことができなかった。
<実施例1>ICGによる潅流測定方法確立
本発明者等は、血液内ICG濃度力学による潅流測定方法を確立するために下記のような工程を経て数式を導出した。
<実施例2>インドシアニングリーンを使用した潅流測定及び相関係数による潅流マップの作成と組織壊死確率マップ作成
本発明者等は、実際の虚血組織でのICGイメージを得るために血液潅流低下モデルを作った。50匹のヌードマウス(Charlse liver Japan,Inc.)の片方の足の大腿部動脈と静脈を除去する手術を施行して、手術当日の4時間後、図2に示した測定装置を使用してICG映像を得て、前記方法を通じて組織の潅流程度を求めた。
Claims (18)
- インドシアニングリーン(ICG)蛍光イメージを使用した組織潅流程度分析装置。
- 1)光探知機からの信号入力を受けるための入力手段、2)前記入力された信号を関心地域での時間による蛍光強度に処理するための数値化手段、3)前記数値から組織の部位別に潅流程度を求めるための潅流程度演算手段及び、4)前記演算結果を出力するための出力手段からなることを特徴とする、請求項1に記載の組織潅流程度分析装置。
- 前記潅流程度が、特定時間で測定した組織での蛍光強度力学を通じて計算されることを特徴とする、請求項2に記載の組織潅流程度分析装置。
- 光の透過が可能な生体台、その上に載せられたICGが注入された生体に光を照射することができるように位置調整可能な光源、該光源によって生体から出る蛍光信号中で800〜850nmの近赤外線波長のみが通過するように位置調整されたフィルター、該フィルターを通過した蛍光光を探知する探知機及び該探知機と作動可能に連結されて前記探知機で感知した光を映像化して時間に対するICG力学分析を通じて組織潅流の程度を測定するための請求項1の分析装置を含む組織潅流測定装置。
- 前記光源が、770+/−30nmの発光ダイオード(LED)や白色光に770+/−30nmのフィルターを付着した光源、または、770+/−30nmのレーザー光源であることを特徴とする、請求項6に記載の組織潅流測定装置。
- 探知機が、赤外線感知カメラや分光測定機であることを特徴とする、請求項6に記載の組織潅流測定装置。
- 1)生体内でインドシアニングリーン(ICG)を注射して光源を使用して前記生体に光を照査した後、光探知機を使用して前記生体から発生する蛍光強度を測定することで、ICG濃度が充分に低くなる時間まで連続的にICG濃度を探知する工程と、
2)時間によって探知された連続的な生体内ICG濃度変化を分析して、部位別に時間別ICG蛍光強度を数値化するデータ処理工程、及び
3)前記数値化されたデータから潅流程度を計算する工程とを含む、組織潅流程度の測定方法。 - 前記計算された潅流程度を潅流マップ(perfusion map)に出力する工程をさらに含む、請求項9に記載の測定方法。
- 前記潅流マップが、グラジエント色マップ(colorgradient map)によって、前記分析されたデータを総合して計算された潅流程度に該当する色を該当のピクセルに被せることで作成されることを特徴とする、請求項10に記載の測定方法。
- 1)生体内でインドシアニングリーン(ICG)を注射して光源を使用して前記生体に光を照査した後、光探知機を使用して前記生体から発生する蛍光強度を測定することで、ICG濃度が充分に低くなる時間まで連続的にICG濃度を探知する工程と、
2)時間によって得られたICG血管映像図で各ピクセル別にICG蛍光強度力学を分析してTmaxを得る工程、及び
3)Tmaxによる潅流程度を計算する工程とを含む、組織の潅流程度測定方法。 - 前記計算された潅流程度を潅流マップに出力する工程をさらに含む、請求項12に記載の測定方法。
- 前記潅流マップが、グラジエント色マップによって、前記分析されたデータを総合して計算された潅流程度に該当する色を該当のピクセルに加えることにより作成されることを特徴とする、請求項13に記載の測定方法。
- 請求項9または請求項12の測定方法を通じて導出された組織の潅流程度を基に、組織の壊死する確率を提示する組織壊死確率マップを結果として表示する工程を含む、組織の壊死程度予測方法。
- 前記潅流程度が、測定組織での蛍光力学パターンを使用して得たICG蛍光強度が最高になる時の時間を使用して計算されることを特徴とする、請求項9または請求項12に記載測定方法。
- 前記潅流マップが、関心部分(Region of interest,ROI)を、1)特定部分のピクセルの平均的なデータ、2)ピクセル単位または、3)各関心部分別に潅流程度を求めてその値に対してそれぞれ決まった色を指定して領域別に彩色して、部分別に潅流程度を図示する方法を選択的に導入することを特徴とする、請求項10または請求項13に記載の測定方法。
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KR1020060099033A KR100867977B1 (ko) | 2006-10-11 | 2006-10-11 | 인도시아닌 그린 혈중 농도 역학을 이용한 조직 관류 분석장치 및 그를 이용한 조직 관류 분석방법 |
PCT/KR2007/003355 WO2008044822A1 (en) | 2006-10-11 | 2007-07-11 | System for analyzing tissue perfusion using concentration of indocyanine green in blood |
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EP2073706A4 (en) | 2010-07-28 |
EP2073706B1 (en) | 2011-10-19 |
US20100036217A1 (en) | 2010-02-11 |
KR100867977B1 (ko) | 2008-11-10 |
EP2073706A1 (en) | 2009-07-01 |
JP4989728B2 (ja) | 2012-08-01 |
ATE529037T1 (de) | 2011-11-15 |
KR20080032916A (ko) | 2008-04-16 |
US8285353B2 (en) | 2012-10-09 |
WO2008044822A1 (en) | 2008-04-17 |
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