KR101384553B1 - 주파수 영역 간섭법을 이용하여 광 영상화를 수행하는 방법 및 장치 - Google Patents
주파수 영역 간섭법을 이용하여 광 영상화를 수행하는 방법 및 장치 Download PDFInfo
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Abstract
Description
도 1은 시간 영역 광 간섭성 단층 촬영(optical coherence tomography;"OCT") 시스템의 블록도이다.
도 2는 스펙트럼 레이더 기술을 이용하여 주파수 영역 영상화를 수행하는 시스템의 블록도이다.
도 3A는 본 발명의 일 실시예에 따른 간섭성 단일 주파수 조정 소스를 사용하여 주파수 영역 영상화를 수행하는 시스템의 블록도이다.
도 3B 및 도 3C는 도 3A의 시스템에 의해 생성된 주파수 편이의 발생을 나타내는 파장 대 진폭의 그래프들이다.
도 3D는 도 3A의 시스템에 의해 생성된 비트 신호의 그래프이다.
도 4A는 본 발명의 다른 실시예에 따른 다수의 종방향 모드 파장 스위프 소스(multiple-longitudinal-mode wavelength-swept source)를 이용하여 주파수 영역 영상화를 수행하는 시스템의 블록도이다.
도 4B 및 도 4C는 도 4A의 시스템에 의해 생성된 스펙트럼내의 편이의 발생을 나타내는 파장 스펙트럼의 그래프들이다.
도 4D는 도 4A의 시스템에 의해 생성된 비트 신호의 그래프이다.
도 5는 본 발명의 다른 실시예에 따른 파장 스위프 소스를 이용하여 주파수 영역 영상화를 수행하는 시스템의 블록도이다.
도 6은 본 발명의 일 실시예에 따른 광 파장 가변 필터 장치의 블록도이다.
도 7은 본 발명의 일 실시예에 따른 파장 스위프 레이저 장치의 블록도이다.
도 8A는 도 7의 파장 스위프 레이저의 출력에서 측정된 레이저 출력 스펙트럼의 예시적 그래프이다.
도 8B는 도 7의 파장 스위프 레이저의 출력에서 측정된 레이저 출력의 예시적 그래프이다.
도 9A는 본 발명의 또 다른 실시예에 따른 다면경(polygonal mirror)을 구비한 파장 가변 필터 장치의 블록도이다.
도 9B는 본 발명의 또 다른 실시예에 따른 반사 디스크를 구비한 파장 가변 필터 장치의 블록도이다.
도 10A는 본 발명의 또 다른 실시예에 따른 파장 스위프 레이저 및 편향 다이버시티 평형 검출(polarization diversity-balanced detection; "PDBD")회로를 포함하는 광 주파수 영역 영상화(optical frequency domain imaging; "OFDI") 시스템의 블록도이다.
도 10B는 도 10A에 도시된 예시적 프로브 장치의 블록도이다.
도 10C는 도 10A의 시스템을 이용한 반송 주파수 헤테로다인 검출의 예시적 출력들을 나타내는 복수의 그래프들이다.
도 11은 본 발명의 예시적 실시예들을 이용하여 획득한 사람의 손가락 끝(finger tip)의 예시적 생체 영상을 나타낸 도면이다.
도 12는 본 발명의 일 실시예에 따른 위상 추적 장치의 블로도이다.
도 13은 상기 위상 추적기를 구비한 본 발명에 따른 OFDI 시스템의 일 실시예의 블록도이다.
도 14A-14C는 본 발명에 따른 위상 추적기 동작을 위한 예시적 기술을 나타내는 흐름도이다.
도 15는 본 발명의 다른 실시예에 따른 OFDI 시스템의 개략도이다.
도 16(a) 및 도 16(b)은 본 발명에 따른 주파수 편이의 효과에 대한 즉, 깊이 대 신호 주파수의 그래프이다.
도 17은 본 발명의 또 다른 예시적 실시예에 따른 2개의 음향 광학 주파수 편이기들을 이용한 OFDI 시스템의 블록도이다.
도 18(a) 및 도 18(b)은 본 발명에 따른 매핑 처리를 하지 않고 측정된 포인트 확산(point spread) 함수들의 그래프들이다.
도 18(b) 및 도 18(c)은 본 발명에 따른 매핑 장치로 측정된 포인트 확산 함수들의 그래프들이다.
도면 전체에 걸쳐서 다르게 기술하지 않는 한 같은 번호 및 문자들은 예시한 실시예들의 유사한 특징들, 소자들, 구성요소들 또는 부분들을 나타내는데 사용된다. 또한 본 발명은 이제 본 발명을 도면들을 참조하여 기술하지만, 예시적 실시예들과 관련하여 설명된다.
Claims (11)
- 삭제
- 삭제
- 삭제
- 하나의 샘플에 적어도 하나의 제1 전자기 방사를 제공하고 기준물에 적어도 하나의 제2 전자기 방사를 제공하되, 상기 제1 전자기 방사와 제2 전자기 방사중 적어도 하나는 밀리 초당 100 테라 헤르츠 이상의 조정 속도에서 시간에 따라 변화하는 중심 주파수 스펙트럼을 가지도록 되어있는 적어도 상기 제1 전자기 방사와 제2 전자기 방사를 제공하는 제1 장치; 및
상기 적어도 샘플로부터 복귀된 적어도 하나의 제3 전자기 방사와 상기 기준물로부터 복귀된 적어도 하나의 제4 전자기 방사 사이의 간섭을 검출하는 적어도 하나의 제2 장치를 구비하는 것을 특징으로 하는 장치.
- 제4항에 있어서,
상기 중심 주파수는 5 킬로 헤르츠 이상의 반복율로 반복적으로 변화하는 것을 특징으로 하는 장치.
- 제4항에 있어서,
상기 중심 주파수는 10 테라 헤르츠 이상의 범위에 걸쳐 변화하는 것을 특징으로 하는 장치.
- 하나의 샘플에 적어도 하나의 제1 전자기 방사를 제공하고 기준물에 적어도 하나의 제2 전자기 방사를 제공하되, 상기 제1 전자기 방사와 제2 전자기 방사중 적어도 하나는 밀리 초당 100 테라 헤르츠 이상의 조정 속도에서 시간에 따라 변화하는 중심 주파수 스펙트럼을 가지도록 되어있는 단계; 및
상기 적어도 하나의 샘플로부터 복귀된 적어도 하나의 제3 전자기 방사와 상기 기준물로부터 복귀된 적어도 하나의 제4 전자기 방사 사이의 간섭을 검출하는 단계를 포함하는 것을 특징으로 하는 방법.
- 삭제
- 삭제
- 제4항에 있어서, 상기 중심 주파수는 시간에 따라 연속적으로 변화하는 것을 특징으로 하는 장치.
- 제7항에 있어서, 상기 중심 주파수는 시간에 따라 연속적으로 변화하는 것을 특징으로 하는 방법.
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| US51476903P | 2003-10-27 | 2003-10-27 | |
| US60/514,769 | 2003-10-27 | ||
| PCT/US2004/029148 WO2005047813A1 (en) | 2003-10-27 | 2004-09-08 | Method and apparatus for performing optical imaging using frequency-domain interferometry |
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| KR1020137003757A Expired - Lifetime KR101384553B1 (ko) | 2003-10-27 | 2004-09-08 | 주파수 영역 간섭법을 이용하여 광 영상화를 수행하는 방법 및 장치 |
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| US9295391B1 (en) | 2000-11-10 | 2016-03-29 | The General Hospital Corporation | Spectrally encoded miniature endoscopic imaging probe |
| DE10297689B4 (de) | 2001-05-01 | 2007-10-18 | The General Hospital Corp., Boston | Verfahren und Gerät zur Bestimmung von atherosklerotischem Belag durch Messung von optischen Gewebeeigenschaften |
| US7355716B2 (en) | 2002-01-24 | 2008-04-08 | The General Hospital Corporation | Apparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands |
| US7643153B2 (en) | 2003-01-24 | 2010-01-05 | The General Hospital Corporation | Apparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands |
| CA2519937C (en) | 2003-03-31 | 2012-11-20 | Guillermo J. Tearney | Speckle reduction in optical coherence tomography by path length encoded angular compounding |
| US7515626B2 (en) * | 2003-05-29 | 2009-04-07 | Novera Optics, Inc. | Light source capable of lasing that is wavelength locked by an injected light signal |
| EP2280257B1 (en) | 2003-06-06 | 2017-04-05 | The General Hospital Corporation | Process and apparatus for a wavelength tuned light source |
| EP3009815B1 (en) | 2003-10-27 | 2022-09-07 | The General Hospital Corporation | Method and apparatus for performing optical imaging using frequency-domain interferometry |
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