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    Systems and methods for swept-source optical coherence tomographic vibrography
    3.
    发明授权
    Systems and methods for swept-source optical coherence tomographic vibrography 有权

    公开(公告)号：US10729327B2

    公开(公告)日：2020-08-04

    申请号：US15758026

    申请日：2016-10-14

    申请人： DALHOUSIE UNIVERSITY

    发明人： Robert Adamson ,  Daniel Macdougall ,  Manohar Bance ,  Jeremy Brown

    IPC分类号： A61B5/00 ,  A61B5/12 ,  G01N29/06 ,  G01N29/24 ,  G01B9/02

    摘要： Systems and methods are provided for performing OCT vibrography based on the synchronization of components of the OCT vibrography system. An A-scan trigger is employed to synchronize the operation of the scanning subsystem that scans the sample beam and an acoustic stimulus source that generates an acoustic stimulus for vibrographic measurements. The acoustic stimulus source is controlled such that when the scanning subsystem dwells on an imaging line selected for vibrography measurements, the acoustic stimulus is generated over a plurality of A-scans and the phase of the acoustic stimulus is locked to the A-scan trigger, such that the phase of the acoustic stimulus is incrementally modified with each A-scan. The accumulation of the acoustic phase is therefore synchronized to the A-scan trigger. The synchronization, providing synchronized acoustic phase evolution during each acoustic phase waveform cycle, permits the use of the OCT vibrography system for simultaneous anatomical and functional imaging.

    ULTRASOUND IMAGING SYSTEM USING BEAMFORMING TECHNIQUES FOR PHASE COHERENCE GRATING LOBE SUPPRESSION
    4.
    发明申请
    ULTRASOUND IMAGING SYSTEM USING BEAMFORMING TECHNIQUES FOR PHASE COHERENCE GRATING LOBE SUPPRESSION 有权
    超声波成像系统使用波束形成技术进行相位相干光栅抑制

    公开(公告)号：US20150366542A1

    公开(公告)日：2015-12-24

    申请号：US14712698

    申请日：2015-05-14

    申请人： DALHOUSIE UNIVERSITY

    发明人： Jeremy Brown ,  Robert Adamson ,  Zahra Torbatian ,  Manohar Bance

    IPC分类号： A61B8/08 ,  A61B8/14 ,  A61B8/00

    CPC分类号： A61B8/5269 ,  A61B8/145 ,  A61B8/4483 ,  A61B8/5207 ,  G01S7/52047 ,  G01S15/8915 ,  G01S15/8927 ,  G01S15/8956 ,  G01S15/8997 ,  G10K11/346

    摘要： High-frequency ultrasound imaging can be performed with greater quality and suppressed grating lobes by using methods and systems for effectively reducing the temporal length of transmit grating lobe signals in received ultrasound echoes. Systems and methods are provided for improved high-frequency ultrasound imaging. In various aspects, the method of shortening the time domain of grating lobe signals comprises splitting an array of N transmit elements into K sub-apertures. In further aspects, the grating lobes are suppressed by performing signal processing of the shortened grating lobe signals. In certain aspects, the signal processing method comprises weighting the samples by a calculated phase coherence factor.

    摘要翻译： 可以通过使用用于有效地减少接收的超声回波中的发射光栅信号的时间长度的方法和系统，以更高的质量和抑制的光栅瓣来执行高频超声成像。 提供了用于改进的高频超声成像的系统和方法。 在各个方面，缩短光栅波瓣信号的时域的方法包括将N个发射元件的阵列分成K个子孔径。 在另外的方面，通过执行缩短的光栅叶信号的信号处理来抑制光栅瓣。 在某些方面，信号处理方法包括通过计算的相位相干因子对样本进行加权。