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31 条记录 (耗时 0.042 秒)

    Overlay image contrast enhancement
    4.
    发明授权
    Overlay image contrast enhancement 有权
    覆盖图像对比度增强

    公开(公告)号：US08275449B2

    公开(公告)日：2012-09-25

    申请号：US11595047

    申请日：2006-11-10

    申请人： Christopher A. White ,  Desmond Hirson ,  Stanley Poon ,  James Mehi

    发明人： Christopher A. White ,  Desmond Hirson ,  Stanley Poon ,  James Mehi

    IPC分类号： A61B6/00

    CPC分类号： G06T5/50 ,  A61B6/00 ,  A61B6/507 ,  A61B6/508 ,  A61B8/481 ,  A61B8/483 ,  G06T5/009 ,  G06T2207/10132 ,  G06T2207/30004 ,  G06T2207/30048 ,  G06T2207/30084

    摘要： A method of creating an image difference overlay comprises identifying a loop of reference images of a subject and identifying a loop of data images of the subject. The loop of image data can be identified after an event, such as the administration of contrast agent to the subject. A reference loop image frame is compared to one or more data loop image frames and the reference loop frame is associated with a data loop image frame which closely resembles the data loop image frame. Each of the associated frames can then be processed and used to create an image difference overlay frame.

    摘要翻译： 创建图像差异覆盖的方法包括识别对象的参考图像的循环并且识别对象的数据图像的循环。 可以在事件之后识别图像数据的循环，诸如向对象施用造影剂。 将参考循环图像帧与一个或多个数据循环图像帧进行比较，并且参考循环帧与数据循环图像帧相关联，数据循环图像帧非常类似于数据循环图像帧。 然后可以对每个相关联的帧进行处理并用于创建图像差分叠加帧。

    OVERLAY IMAGE CONTRAST ENHANCEMENT
    6.
    发明申请
    OVERLAY IMAGE CONTRAST ENHANCEMENT 审中-公开
    重叠图像对比增强

    公开(公告)号：US20130083981A1

    公开(公告)日：2013-04-04

    申请号：US13626826

    申请日：2012-09-25

    申请人： Christopher A. White ,  Desmond Hirson ,  Stanley Poon ,  James Mehi

    发明人： Christopher A. White ,  Desmond Hirson ,  Stanley Poon ,  James Mehi

    IPC分类号： G06T5/50

    CPC分类号： G06T5/50 ,  A61B6/00 ,  A61B6/507 ,  A61B6/508 ,  A61B8/481 ,  A61B8/483 ,  G06T5/009 ,  G06T2207/10132 ,  G06T2207/30004 ,  G06T2207/30048 ,  G06T2207/30084

    摘要： A method of creating an image difference overlay comprises identifying a loop of reference images of a subject and identifying a loop of data images of the subject. The loop of image data can be identified after an event, such as the administration of contrast agent to the subject. A reference loop image frame is compared to one or more data loop image frames and the reference loop frame is associated with a data loop image frame which closely resembles the data loop image frame. Each of the associated frames can then be processed and used to create an image difference overlay frame.

    摘要翻译： 创建图像差异覆盖的方法包括识别对象的参考图像的循环并且识别对象的数据图像的循环。 可以在事件之后识别图像数据的循环，诸如向对象施用造影剂。 将参考循环图像帧与一个或多个数据循环图像帧进行比较，并且参考循环帧与数据循环图像帧相关联，数据循环图像帧非常类似于数据循环图像帧。 然后可以对每个相关联的帧进行处理并用于创建图像差分叠加帧。

    METHOD FOR NONLINEAR IMAGING OF ULTRASOUND CONTRAST AGENTS AT HIGH FREQUENCIES
    7.
    发明申请
    METHOD FOR NONLINEAR IMAGING OF ULTRASOUND CONTRAST AGENTS AT HIGH FREQUENCIES 审中-公开
    超高频超声波对比剂非线性成像方法

    公开(公告)号：US20100298709A1

    公开(公告)日：2010-11-25

    申请号：US12763053

    申请日：2010-04-19

    申请人： Andrew Needles ,  James I. Mehi ,  Desmond Hirson

    发明人： Andrew Needles ,  James I. Mehi ,  Desmond Hirson

    IPC分类号： A61B8/14

    CPC分类号： G01S7/52038 ,  A61B8/06 ,  A61B8/13 ,  A61B8/14 ,  A61B8/481 ,  A61B8/543 ,  G01S7/52039 ,  G01S15/108 ,  G01S15/8956 ,  G01S15/8959

    摘要： This invention employs multiple ultrasound pulse firings of either alternating phase and/or amplitude to detect nonlinear fundamental and subharmonic signals from microbubble contrast agents within living tissue, at high frequencies (≧15 MHz), e.g., with a linear array transducer. It can be shown that the contrast-to-tissue ratio (CTR) decreases with increasing ultrasound frequency because of nonlinear ultrasound propagation in tissue. However, using the subharmonic signal in addition to the nonlinear fundamental harmonic component, rather than the conventional second harmonic used at lower frequencies, provides appreciable signal strength to overcome the limitations of nonlinear tissue propagation. Additionally, the method provides for the ability to switch, at some desired frequency above 20 MHz, into a purely alternating phase inversion acquisition, in combination with bandpass filtering of the subharmonic frequency band, minimizing the losses in CTR as the frequency increases. This maintains contrast sensitivity for more limited fields of view, as penetration depth will be limited at higher frequencies. Thus, within the same micro-ultrasound imaging system, many applications of microbubble detection can be achieved with a wide range of frequencies that covers both resolution and sensitivity requirements.

    摘要翻译： 本发明采用交替相位和/或幅度的多个超声波脉冲发射来检测来自微生物组织内的微泡造影剂的非线性基频和次谐波信号，在高频（≥15MHz），例如利用线性阵列换能器。 可以看出，由于组织中的非线性超声传播，对比组织比（CTR）随着超声频率的增加而降低。 然而，除了非线性基本谐波分量之外，使用次谐波信号，而不是在较低频率下使用的常规二次谐波，提供了明显的信号强度来克服非线性组织传播的限制。 另外，该方法提供了能够在20MHz以上的某个所需频率下，将它们转换为纯交替的相位反相采集，结合频带分频带的带通滤波，使频率增加时CTR的损耗最小化。 这对于更有限的视场保持对比灵敏度，因为穿透深度将在较高频率下受到限制。 因此，在相同的微超声成像系统中，可以在涵盖分辨率和灵敏度要求的宽范围的频率范围内实现微泡检测的许多应用。

    PHOTOACOUSTIC TRANSDUCER AND IMAGING SYSTEM
    8.
    发明申请
    PHOTOACOUSTIC TRANSDUCER AND IMAGING SYSTEM 审中-公开
    光电传感器和成像系统

    公开(公告)号：US20130190591A1

    公开(公告)日：2013-07-25

    申请号：US13695275

    申请日：2011-04-29

    申请人： Desmond Hirson ,  Andrew Needles ,  Pinhas Ephrat ,  Nicholas Christopher Chaggares

    发明人： Desmond Hirson ,  Andrew Needles ,  Pinhas Ephrat ,  Nicholas Christopher Chaggares

    IPC分类号： A61B5/00

    CPC分类号： A61B5/0095 ,  A61B5/742 ,  A61B8/4416 ,  A61B8/4444 ,  A61B8/4488 ,  A61B8/483 ,  A61B2562/0233

    摘要： The invention disclosed herein features a photoacoustic scan head that includes laser fibers integrated into the housing of an arrayed ultrasound transducer using an optically transparent epoxy or other resin. The light-emitting ends of the fibers are positioned adjacent to the front surface of the transducer and direct laser light onto a subject being scanned by the transducer. The light beams generated by the fibers may be angled to intersect the acoustic field generated by the transducer so as to generate a photoacoustic effect in the region scanned by the transducer.

    摘要翻译： 本文公开的本发明特征在于一种光声扫描头，其包括使用光学透明的环氧树脂或其它树脂集成到排列的超声换能器的壳体中的激光光纤。 光纤的发光端位于传感器前表面附近，并将激光直接照射到由传感器扫描的被摄物体上。 由光纤产生的光束可以成角度以与由换能器产生的声场相交，以便在由换能器扫描的区域中产生光声效应。

    Ultrasonic matching layer and transducer
    10.
    发明授权
    Ultrasonic matching layer and transducer 有权
    超声波匹配层和传感器

    公开(公告)号：US07808156B2

    公开(公告)日：2010-10-05

    申请号：US11366144

    申请日：2006-03-02

    申请人： N. Chris Chaggares ,  James Mehi ,  Desmond Hirson

    发明人： N. Chris Chaggares ,  James Mehi ,  Desmond Hirson

    IPC分类号： H04R17/00

    CPC分类号： G10K11/02 ,  A61B8/4281 ,  A61B8/4444 ,  B06B1/067

    摘要： In one aspect, matching layers for an ultrasonic transducer stack having a matching layer comprising a matrix material loaded with a plurality of micron-sized and nano-sized particles. In another aspect, the matrix material is loaded with a plurality of heavy and light particles. In another aspect, an ultrasound transducer stack comprises a piezoelectric layer and at least one matching layer. In one aspect, the matching layer comprises a composite material comprising a matrix material loaded with a plurality of micron-sized and nano-sized particles. In a further aspect, the composite material can also comprise a matrix material loaded with a plurality of heavy and light particles. In a further aspect, a matching layer can also comprise cyanoacrylate.

    摘要翻译： 在一个方面，用于具有匹配层的超声波换能器叠层的匹配层包括装载有多个微米尺寸和纳米尺寸颗粒的基质材料。 在另一方面，基质材料装载有多个重和轻的颗粒。 在另一方面，超声换能器叠层包括压电层和至少一个匹配层。 在一个方面，匹配层包括复合材料，其包含负载有多个微米级和纳米尺寸颗粒的基质材料。 在另一方面，复合材料还可以包含装载有多个重和轻颗粒的基质材料。 在另一方面，匹配层还可以包含氰基丙烯酸酯。