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    • 3. 发明申请
    • PHASE SENSITIVE FOURIER DOMAIN OPTICAL COHERENCE TOMOGRAPHY
    • 相敏感FOURIER域光学相干TOMOGRAPHY
    • WO2006100544A1
    • 2006-09-28
    • PCT/IB2005/050958
    • 2005-03-21
    • ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)LEITGEB, RainerBACHMANN, AdrianLASSER, Theo
    • LEITGEB, RainerBACHMANN, AdrianLASSER, Theo
    • G01B9/02A61B5/00
    • G01B9/02044A61B5/0066A61B5/0073A61B5/7257G01B9/02003G01B9/02069G01B9/02091G01B2290/45G01B2290/70
    • Optical Coherence Tomography (OCT) is an imaging technique with high axial resolution in the micro-meter-scale range combined with a high sensitivity allowing for example to probe weakly back-scattering structures beneath the surface of biological tissues up to several millimeters. A major improvement of this conventional technique represents Fourier Domain OCT with a further decrease in image acquisition time and additional sensitivity. The apparatus including appropriate signal processing reconstructs the depth profile from the spectrally resolved light signal generated by a broadband source and an interferometric imaging system. By frequency shifting the light fields with frequency shifting means in the reference and sample arm a phase resolved signal at high speed can be registered. Therefore the reference arm does not rely on arm length changes or delays. The beating signal generated in this way shows high phase stability. The phase of this beating signal is not wavelength dependent, as the frequency shift applied is the same for all wavelengths. Moreover this results in an additional suppression of unwanted auto-correlated distortion as well as an extended depth range.
    • 光学相干断层扫描(OCT)是一种成像技术,在微米尺度范围内具有高轴向分辨率,并具有高灵敏度,例如可以探测几毫米以下的生物组织表面之下的弱背散射结构。 这种常规技术的主要改进表现为傅立叶域OCT,图像获取时间和附加灵敏度进一步降低。 包括适当信号处理的装置根据由宽带源和干涉成像系统产生的光谱分辨光信号重构深度分布。 通过在参考和采样臂中使用频移装置对光场进行频移,可以登记高速的相位解析信号。 因此,参考臂不依赖于手臂长度的变化或延迟。 以这种方式产生的跳动信号显示出高相位稳定性。 这种跳动信号的相位不是波长相关的,因为施加的频移对于所有波长都是相同的。 此外,这导致额外的抑制不想要的自相关失真以及扩展的深度范围。
    • 5. 发明申请
    • FUNCTIONAL OPTICAL COHERENT IMAGING
    • 功能光学相干成像
    • WO2010004365A1
    • 2010-01-14
    • PCT/IB2008/052787
    • 2008-07-10
    • ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)LASSER, TheoVAN DE VILLE, DimitriMARTIN-WILLIAMS, EricaLEUTENEGGER, MarcelMAERKI, IwanFRIEDRICH, MichaelVILLIGER, Martin
    • LASSER, TheoVAN DE VILLE, DimitriMARTIN-WILLIAMS, EricaLEUTENEGGER, MarcelMAERKI, IwanFRIEDRICH, MichaelVILLIGER, Martin
    • A61B5/00A61B5/026A61B3/12
    • A61B5/0066A61B3/102A61B3/1233A61B5/0048A61B5/0059A61B5/02028A61B5/413A61B5/7203A61B5/726A61B5/7278A61B5/742
    • The present invention relates to a functional optical coherent imaging (fOCI) platform comprising at least one active camera unit (ACU) comprising a coherent and/or a partially coherent light source, and means for spectral filtering and imaging a selected body area of interest; an image processing unit (IPU) for pre-processing data received from an ACU; at least one stimulation unit (STU) transmitting a stimulation to a subject; at least one body function reference measurement unit (BFMU); a central clock and processing unit (CCU), with interconnections to the ACU, the IPU, the STU, for collecting pre-processed data from the IPU, stimuli from the STU body function reference data from the BFMU in a synchronized manner; a post-processing unit (statistical analysis unit, SAU); and an operator interface (HOI). Further the invention relates to a process for acquiring stimuli activated subject data comprising the steps of aligning a body function unit at a subject and monitoring pre-selected body function; selecting a stimulus or stimuli; imaging a body area of interest; exerting one or a series of stimuli on the subject; imaging the body area of interest synchronous with said stimuli and the preselected body functions; and transferring said synchronized image, stimuli and body function data to a statistical analysis unit (SAU) and performing calculations to generate results pertaining to body functions.
    • 功能性光学相干成像(fOCI)平台本发明涉及包括至少一个包括相干和/或部分相干光源的有源相机单元(ACU)的功能性光学相干成像(fOCI)平台,以及用于对感兴趣的所选择的身体区域进行频谱滤波和成像的装置; 用于预处理从ACU接收的数据的图像处理单元(IPU); 向受试者传送刺激的至少一个刺激单元(STU); 至少一个身体功能参考测量单元(BFMU); 中央时钟和处理单元(CCU),与ACU,IPU,STU的互连,用于从IPU收集预处理的数据,以同步方式从BFMU的STU主体功能参考数据的刺激; 后处理单位(统计分析单位,SAU); 和操作界面(HOI)。 此外,本发明涉及一种用于获取刺激激活的受试者数据的方法,包括以下步骤:对准受试者的身体功能单元并监测预先选择的身体功能; 选择刺激或刺激; 成像感兴趣的身体区域; 在该主题上施加一个或一系列刺激; 对与所述刺激同步的感兴趣的身体区域和预选的身体功能进行成像; 以及将所述同步图像,刺激和身体功能数据传送到统计分析单元(SAU)并执行计算以产生与身体功能有关的结果。