JP2009509694A - 不安定プラークの検出 - Google Patents
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Abstract
Description
本発明は、同一プローブ内で、赤外分光法と表面下撮像(例えばOTC)という2つの検出様式を組み合わせると、不安定プラークなどの病変を検出するプローブの能力が向上するという認識に基づいている。
light source)(例えば広帯域光源)の干渉包絡線に従って計測対象の様々な深さからの情報を与える。更に、処理モジュール140は、特定の群遅延の中央に位置する信号のフーリエ変換(FT)を用いて、動脈壁104の特定の厚さにおける累積吸光度を得る(すなわち、分光情報)。
100Cは、それぞれプローブ106内に延伸する第1光導波路108及び第2光導波路114並びに第1ビームスプリッター152を介して第2光導波路114の一部に結合した第3光導波路118を含む。VPDS
100Cは、第2ビームスプリッター154を介して第1光導波路108の一部に結合した第4光導波路150も含む。第1及び第2ビームスプリッターそれぞれは、50%のパワー分割率を持ち、1つの入力ポート及び2つの出力ポート、又は2つの入力ポート及び1つの出力ポートとを備えた50/50融着型ファイバ1×2カプラである。
100Bの場合と同様に、処理モジュール140は、例えば、光源122と、光カプラ128と、光学検出器126との組合せ特性に基づいて、表面下撮像情報及び分光情報を得ることができる。
100A及びVPDS 100B)、プローブ106は送出及び収集用の光導波路を1つのみ含むことができ、この同一光導波路を用いて分光分析及び表面下撮像用の光放射を収集する。こうした実施形態は、別法として、分光分析及び表面下撮像用の光放射を別々に収集するため複数の光導波路を含むこともできる。表面下撮像用の光放射が1つの光導波路から送出され別の光導波路内に収集される実施形態では(例えば、VPDS
100C及びVPDS 100D)、プローブ106は少なくとも2つの光導波路を含む。
100B及びVPDS 100C)では、ガラス又はプラスチック製の光ファイバを散乱光の収集のために使用できる。分光分析のための集光には別の光導波路を用いる実施形態(例えば、VPDS
100A及びVPDS 100D)では、分光分析用のこの光導波路は、ガラス又はプラスチック製の光ファイバ或いはそうしたファイバの束を使用できる。一実施形態では、このプローブは、それぞれが直径0.005ミリメートルの25本の光ファイバ束を含む。これらファイバは、露出したままでも、生体適合性材料層及び/又はポリテトラフルオロエチレン(「PTFE」)などの潤滑性層で被覆しても、コイルワイヤ・ジャケットで包囲してもよい。ファイバ上に設けるこのオプションの被覆又はジャケットは、丸みをつけることであらゆる方向に屈曲可能とするか、望ましくない方向への屈曲を防止するため平坦としてもよい。
他の実施形態
Claims (20)
- 管腔内壁によって画定される管腔内の不安定プラークを検出するための装置であって、
遠位部と近位部とを備えたプローブと、
前記プローブに沿って延伸する光導波路であって、前記遠位部と前記近位部との間で光放射を伝達するよう構成され、前記管腔内壁と連通する遠位端を備えた光導波路と、
前記光導波路に結合されると共に前記管腔内壁の表面下撮像に関する干渉信号を与えるよう構成された干渉計と、
前記管腔内壁から収集される光の検出強度から分光情報を与えるよう構成された処理モジュールとを含む、装置。 - 前記処理モジュールは、前記光導波路により前記管腔内壁から収集される光の前記検出強度を受け取るように構成されている、請求項1に記載の装置。
- 前記プローブに沿って延伸する第2光導波路であって、前記遠位部と前記近位部との間で光放射を伝達するよう構成され、前記管腔内壁と連通する遠位端を備えた第2光導波路を更に含む、請求項1に記載の装置。
- 前記処理モジュールは、前記第2光導波路により前記管腔内壁から収集される光の前記検出強度を受け取るように構成されている、請求項3に記載の装置。
- 前記干渉計は、光コヒーレンス断層撮影法を行うことによって表面下撮像に関する干渉信号を与えるよう構成されている、請求項1に記載の装置。
- 前記干渉計は、光周波数領域反射測定法を行うことによって表面下撮像に関する干渉信号を与えるよう構成されている、請求項1に記載の装置。
- 管腔内壁によって画定される管腔内の不安定プラークを検出するための装置であって、
遠位部と近位部とを備えたプローブと、
前記プローブに沿って延伸する第1光導波路であって、前記遠位部と前記近位部との間で光放射を伝達するよう構成され、前記管腔内壁と連通する遠位端を備えた第1光導波路と、
前記プローブに沿って延伸する第2光導波路であって、前記遠位部と前記近位部との間で光放射を伝達するよう構成され、前記管腔内壁と連通する遠位端を備えた第2光導波路と、
前記第2光導波路の一部に結合した第3光導波路とを含む、装置。 - 前記第1光導波路の前記遠位部に光学連通した光カプラであって、前記第1光導波路と前記管腔内壁との間で光放射を伝達するよう構成された光カプラを更に含む、請求項7に記載の装置。
- 前記第2光導波路の前記遠位部に光学連通した光カプラであって、前記第2光導波路と前記管腔内壁との間で光放射を伝達するよう構成された光カプラを更に含む、請求項7に記載の装置。
- 前記第1光導波路の一部に結合した第4光導波路を更に含む、請求項7に記載の装置。
- 前記第3光導波路から光放射を前記第4光導波路へ可変光群遅延を与えつつ結合するよう構成された可変遅延カプラを更に含む、請求項10に記載の装置。
- 前記可変遅延カプラは、光放射の光源のコヒーレンス長に対応した量で前記可変光群遅延を走査するように構成されている、請求項11に記載の装置。
- 光放射を前記第2及び第3光導波路に結合するよう構成された光源を更に含む、請求項10に記載の装置。
- 光放射を前記第1及び第4光導波路から受け取るよう構成された光学検出器を更に含む、請求項10に記載の装置。
- 前記第3光導波路内で光放射が伝播する方向を、可変光群遅延を与えつつ反転するよう構成された可変遅延反射器を更に含む、請求項7に記載の装置。
- 前記可変遅延反射器は、光放射の光源のコヒーレンス長に対応した量で前記可変光群遅延を走査するように構成されている、請求項15に記載の装置。
- 光放射を前記第2及び第3光導波路に結合するよう構成された光源と、
光放射を前記第2及び第3光導波路から受け取るよう構成された第1光学検出器とを更に含む、請求項7に記載の装置。 - 光放射を前記第1光導波路から受け取るよう構成された第2光学検出器を更に含む、請求項17に記載の装置。
- 前記光カプラは、前記管腔内壁に非外傷的に接触するよう構成された非外傷性光カプラを含む、請求項8に記載の装置。
- 管腔内壁によって画定される管腔内の不安定プラークを検出するための方法であって、
プローブの遠位部を前記管腔に挿入する段階と、
前記プローブに沿って延伸する光導波路に沿って光放射を管腔内壁に伝える段階と、
前記管腔内壁の表面下撮像に関する干渉信号を与えるために、参照光放射を、前記管腔内壁から散乱すると共に前記光導波路を介して戻る光放射に結合させる段階と、
分光情報を抽出するために、前記管腔内壁から収集される光の検出強度を処理する段階とを含む、方法。
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US11/241,726 US7450241B2 (en) | 2005-09-30 | 2005-09-30 | Detecting vulnerable plaque |
PCT/US2006/038650 WO2007041591A2 (en) | 2005-09-30 | 2006-09-29 | Detecting vulnerable plaque |
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EP (1) | EP1928307A2 (ja) |
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JP4241038B2 (ja) | 2000-10-30 | 2009-03-18 | ザ ジェネラル ホスピタル コーポレーション | 組織分析のための光学的な方法及びシステム |
EP2333522A1 (en) * | 2001-04-30 | 2011-06-15 | The General Hospital Corporation | Method and apparatus for improving image clarity and sensitivity in optical coherence tomography using dynamic feedback to control focal properties and coherence gating |
EP1426411A1 (en) * | 2002-12-06 | 2004-06-09 | KRATON Polymers Research B.V. | Styrenic block copolymer compositions to be used for the manufacture of transparent, gel free films |
WO2004088361A2 (en) | 2003-03-31 | 2004-10-14 | The General Hospital Corporation | Speckle reduction in optical coherence tomography by path length encoded angular compounding |
US7761139B2 (en) * | 2003-01-24 | 2010-07-20 | The General Hospital Corporation | System and method for identifying tissue using low-coherence interferometry |
KR20130138867A (ko) | 2003-06-06 | 2013-12-19 | 더 제너럴 하스피탈 코포레이션 | 파장 동조 소스용 방법 및 장치 |
US20080252901A1 (en) * | 2003-09-26 | 2008-10-16 | School Jiridical Person Kitasato Gakuen | Wavelength-Tunable Light Source And Optical Coherence Tomography |
US7447408B2 (en) | 2004-07-02 | 2008-11-04 | The General Hospital Corproation | Imaging system and related techniques |
EP1793730B1 (en) * | 2004-08-24 | 2011-12-28 | The General Hospital Corporation | Process, system and software arrangement for determining elastic modulus |
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JP2008521516A (ja) * | 2004-11-29 | 2008-06-26 | ザ ジェネラル ホスピタル コーポレイション | サンプル上の複数の地点を同時に照射し検出することによって光学画像生成を実行する構成、装置、内視鏡、カテーテル、及び方法 |
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EP1875436B1 (en) * | 2005-04-28 | 2009-12-09 | The General Hospital Corporation | Evaluation of image features of an anatomical structure in optical coherence tomography images |
US9060689B2 (en) * | 2005-06-01 | 2015-06-23 | The General Hospital Corporation | Apparatus, method and system for performing phase-resolved optical frequency domain imaging |
US7783337B2 (en) * | 2005-06-06 | 2010-08-24 | Board Of Regents, The University Of Texas System | OCT using spectrally resolved bandwidth |
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US20070049833A1 (en) * | 2005-08-16 | 2007-03-01 | The General Hospital Corporation | Arrangements and methods for imaging in vessels |
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US7679754B2 (en) | 2010-03-16 |
US20070076212A1 (en) | 2007-04-05 |
WO2007041591B1 (en) | 2007-08-30 |
WO2007041591A2 (en) | 2007-04-12 |
US20090051923A1 (en) | 2009-02-26 |
US8035819B2 (en) | 2011-10-11 |
US7929145B2 (en) | 2011-04-19 |
US20110046490A1 (en) | 2011-02-24 |
US20100165353A1 (en) | 2010-07-01 |
EP1928307A2 (en) | 2008-06-11 |
US7450241B2 (en) | 2008-11-11 |
WO2007041591A3 (en) | 2007-06-21 |
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