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    AUTOMATIC STENT DETECTION
    4.
    发明申请
    AUTOMATIC STENT DETECTION 审中-公开
    自动检测

    公开(公告)号：US20140100449A1

    公开(公告)日：2014-04-10

    申请号：US14044441

    申请日：2013-10-02

    Applicant: Volcano Corporation

    Inventor： Elizabeth Begin ,  Nathaniel J. Kemp ,  Jason Sproul ,  Badr Elmaanaoui

    IPC: A61B5/06 ,  A61B5/00

    CPC classification number: G06T7/0012 ,  A61B5/0066 ,  A61B5/0073 ,  A61B5/061 ,  A61B5/6852 ,  A61B8/0841 ,  A61B8/12 ,  A61B8/14 ,  A61B8/4416 ,  A61B8/5223 ,  A61B8/5261 ,  A61B34/20 ,  G06K9/6247 ,  G06K9/6274 ,  G06T7/0014 ,  G06T7/70 ,  G06T7/74 ,  G06T2207/10072 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10101 ,  G06T2207/10132 ,  G06T2207/10136 ,  G06T2207/20048 ,  G06T2207/20076 ,  G06T2207/20081 ,  G06T2207/30021 ,  G06T2207/30101

    Abstract: This invention relates generally to the detection of objects, such as stents, within intraluminal images using principal component analysis and/or regional covariance descriptors. In certain aspects, a training set of pre-defined intraluminal images known to contain an object is generated. The principal components of the training set can be calculated in order to form an object space. An unknown input intraluminal image can be obtained and projected onto the object space. From the projection, the object can be detected within the input intraluminal image. In another embodiment, a covariance matrix is formed for each pre-defined intraluminal image known to contain an object. An unknown input intraluminal image is obtained and a covariance matrix is computed for the input intraluminal image. The covariances of the input image and each image of the training set are compared in order to detect the presence of the object within the input intraluminal image.

    Abstract translation: 本发明一般涉及使用主成分分析和/或区域协方差描述符检测在腔内图像内的物体，例如支架。 在某些方面，生成已知包含对象的预定义的管腔内图像的训练集。 可以计算训练集的主要组成部分以形成对象空间。 可以获得未知的输入管腔内图像并将其投影到对象空间上。 从投影中可以在输入的管腔内图像中检测物体。 在另一个实施例中，为已知含有对象的每个预定义的管腔内图像形成协方差矩阵。 获得未知的输入管腔内图像，并为输入的管腔内图像计算协方差矩阵。 比较输入图像和训练集合的每个图像的协方差，以便检测输入管腔内图像中物体的存在。

    Systems and methods for amplifying light
    7.
    发明授权
    Systems and methods for amplifying light 有权
    用于放大光的系统和方法

    公开(公告)号：US09478940B2

    公开(公告)日：2016-10-25

    申请号：US14045909

    申请日：2013-10-04

    Applicant: VOLCANO CORPORATION

    Inventor： David Welford ,  Badr Elmaanaoui

    IPC: H01S5/028 ,  H01S5/50 ,  G01N21/47 ,  H01S5/022

    CPC classification number: H01S5/0287 ,  G01N21/4795 ,  H01S5/02216 ,  H01S5/0288 ,  H01S5/50 ,  H01S2301/02

    Abstract: The invention relates to optical system including light sources that amplify light using a gain medium. Systems and method of the invention are provided for amplifying light while inhibiting reflections at a peak gain of the gain medium, thereby suppressing parasitic lasing. This allows a system to use a broad range of wavelengths without parasitic lasing, thereby increasing the useable range of a tunable optical filter. In this manner, light at wavelengths not at a peak gain can be used effectively, and the gain medium of an optical amplifier does not limit use of a system to a narrow range of wavelengths associated with a peak gain of the gain medium. A single optical system according to the invention can thus be used for applications that require a broad range of wavelengths.

    Abstract translation: 本发明涉及包括使用增益介质放大光的光源的光学系统。 提供本发明的系统和方法用于放大光，同时抑制增益介质的峰值增益处的反射，从而抑制寄生激光。 这允许系统使用宽范围的波长而没有寄生激光，从而增加可调谐滤光器的可用范围。 以这种方式，可以有效地使用不具有峰值增益的波长的光，并且光放大器的增益介质不将系统的使用限制在与增益介质的峰值增益相关联的窄波长范围内。 因此，根据本发明的单个光学系统可以用于需要宽波长范围的应用。

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