公开(公告)号：US09549713B2

公开(公告)日：2017-01-24

申请号：US12563754

申请日：2009-09-21

申请人： Shashidhar Sathyanarayana ,  Wenguang Li

发明人： Shashidhar Sathyanarayana ,  Wenguang Li

IPC分类号： A61B8/00 ,  A61B8/08 ,  A61B5/02 ,  A61B5/00 ,  A61B8/12 ,  G06K9/00

CPC分类号： A61B8/08 ,  A61B5/02007 ,  A61B5/7264 ,  A61B5/7267 ,  A61B8/12 ,  G06K9/00147

摘要： A method of evaluating at least one tissue type includes providing a tissue classifier comprising multiple detector arrays for each of multiple tissue types. Each detector array comprises multiple detectors and each detector comprises multiple tissue type-assigned intravascular ultrasound (IVUS) spectra. For each of the detector arrays, an input IVUS spectrum of the tissue region is compared to the tissue type-assigned IVUS spectra of each of the detectors in the detector array and it is determined whether the input spectrum corresponds to the tissue type of the detector. The results for the detector. The results for the detector arrays are combined to provide a tissue characterization of the tissue region from the multiple tissue types. One or more IVUS images can be displayed with the tissue characterization and an indication of the size of at least one of the tissue types in a selected portion of the image that is displayed.

摘要翻译： 评估至少一种组织类型的方法包括提供包括用于多种组织类型中的每一种的多个检测器阵列的组织分类器。 每个检测器阵列包括多个检测器，每个检测器包括多个组织类型分配的血管内超声（IVUS）光谱。 对于每个检测器阵列，将组织区域的输入IVUS光谱与检测器阵列中每个检测器的组织类型分配的IVUS光谱进行比较，并且确定输入光谱是否对应于检测器的组织类型 。 检测器的结果。 组合检测器阵列的结果以从多种组织类型提供组织区域的组织表征。 一个或多个IVUS图像可以与组织表征一起显示，并且显示所显示的图像的所选部分中的组织类型中的至少一个的尺寸的指示。

公开(公告)号：US08529455B2

公开(公告)日：2013-09-10

申请号：US13227337

申请日：2011-09-07

申请人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

发明人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

IPC分类号： A61B8/00

CPC分类号： A61B8/463 ,  A61B8/12

摘要： The field of the invention relates to medical imaging systems, and more particularly to systems and methods for estimating the size and position of a stent or other medical device within a patient. In one embodiment, a medical imaging system includes an elongated tubular member having distal and proximal ends, configured to be inserted into a vessel of a patient, an imaging device coupled to the distal end of the elongated tubular member, and a console electrically coupled to the imaging device, wherein the console includes a computer-usable medium, electrically coupled to the imaging device, having a sequence of instructions which, when executed by a processor, causes said processor to execute a process including generating an image of the vessel, and overlay one or more shapes onto the image age to provide a visual approximation of the size and position of a medical device to be applied within the patient.

摘要翻译： 本发明的领域涉及医学成像系统，更具体地涉及用于估计患者内的支架或其他医疗装置的尺寸和位置的系统和方法。 在一个实施例中，医学成像系统包括具有远端和近端的细长管状构件，构造成插入患者容器中，耦合到细长管状构件的远端的成像装置和电耦合到 成像装置，其中所述控制台包括电耦合到所述成像装置的计算机可用介质，所述计算机可用介质具有指令序列，所述指令序列在由处理器执行时使所述处理器执行包括生成所述容器的图像的处理，以及 将一个或多个形状覆盖到图像时代上以提供将要施加在患者体内的医疗装置的尺寸和位置的视觉近似。

公开(公告)号：US08311614B2

公开(公告)日：2012-11-13

申请号：US12176990

申请日：2008-07-21

申请人： Shashidhar Sathyanarayana

发明人： Shashidhar Sathyanarayana

IPC分类号： A61B5/05

CPC分类号： G06T7/20 ,  G06T7/55 ,  G06T7/74 ,  G06T2207/10068 ,  G06T2207/30101

摘要： An improved method of tracking a catheter's position within a human body does not rely on x-rays, but instead calculates the position of the catheter's imaging head by analyzing image data. Such an analysis is able to determine the position of the imaging head in 3 dimensional space, relative to an arbitrarily selected reference image. An image is compared with the reference image, correlation data between corresponding points on the two images are gathered, and a correlation loss rate in a particular direction is determined. This correlation loss rate is modeled to an exponential function, which is evaluated to estimate an angle of separation between the image and the reference image. One or more angles of separation are used to determine a position in three dimensional space of the image, relative to the reference image. By repeating this process for a series of images being gathered by a catheter, the position of the catheter can be determined. Additionally, a 3 dimensional map of lumens in the human body can be created.

摘要翻译： 跟踪导管在人体内的位置的改进方法不依赖于x射线，而是通过分析图像数据来计算导管成像头的位置。 这样的分析能够相对于任意选择的参考图像来确定成像头在3维空间中的位置。 将图像与参考图像进行比较，收集两个图像上相应点之间的相关数据，并确定特定方向的相关损失率。 该相关损失率被建模为指数函数，其被评估以估计图像和参考图像之间的分离角度。 使用一个或多个分离角度来相对于参考图像来确定图像的三维空间中的位置。 通过对由导管收集的一系列图像重复该过程，可以确定导管的位置。 另外，可以创建人体内流明的三维图。

公开(公告)号：US08175362B2

公开(公告)日：2012-05-08

申请号：US12253471

申请日：2008-10-17

申请人： Shashidhar Sathyanarayana

发明人： Shashidhar Sathyanarayana

IPC分类号： G06K9/00 ,  G06K9/62

CPC分类号： G06T7/0012 ,  G06T7/90 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10132

摘要： Systems and methods are described for displaying classifier output and confidence measure in an image. The confidence measure advantageously provides additional information to the user indicating the accuracy of the classification result. Based on the classification accuracy, the user may accept or reject the classification result. In an exemplary embodiment, the classifier output is displayed on the image by color coding regions in the image based on their classifications. The confidence measure is displayed by adjusting the transparencies of the color coded regions according to their confidence measures. In one embodiment, only the classifications having confidence measures above a threshold are displayed. In other embodiments, the classifier output and confidence measure may be displayed separately, contour lines may be drawn through image regions having similar confidence measures, and the confidence measure may be displayed for a region under a pointer that the user can move within the image.

摘要翻译： 描述了系统和方法，用于在图像中显示分类器输出和置信度量度。 信心度量有利地向用户提供指示分类结果的准确性的附加信息。 根据分类准确性，用户可以接受或拒绝分类结果。 在示例性实施例中，基于分类器的分类，通过图像中的颜色编码区域在图像上显示分类器输出。 通过根据其置信度来调整颜色编码区域的透明度来显示置信度量。 在一个实施例中，仅显示具有高于阈值的置信度度量的分类。 在其他实施例中，可以分开地显示分类器输出和置信度量度，可以通过具有相似置信度测量的图像区域绘制轮廓线，并且可以针对用户可以在图像内移动的指针下的区域来显示置信度量度。

公开(公告)号：US20120004556A1

公开(公告)日：2012-01-05

申请号：US13227337

申请日：2011-09-07

申请人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

发明人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

IPC分类号： A61B8/12 ,  G06F3/048 ,  A61B8/14

CPC分类号： A61B8/463 ,  A61B8/12

摘要： The field of the invention relates to medical imaging systems, and more particularly to systems and methods for estimating the size and position of a stent or other medical device within a patient. In one embodiment, a medical imaging system includes an elongated tubular member having distal and proximal ends, configured to be inserted into a vessel of a patient, an imaging device coupled to the distal end of the elongated tubular member, and a console electrically coupled to the imaging device, wherein the console includes a computer-usable medium, electrically coupled to the imaging device, having a sequence of instructions which, when executed by a processor, causes said processor to execute a process including generating an image of the vessel, and overlay one or more shapes onto the image age to provide a visual approximation of the size and position of a medical device to be applied within the patient.

摘要翻译： 本发明的领域涉及医学成像系统，更具体地涉及用于估计患者内的支架或其他医疗装置的尺寸和位置的系统和方法。 在一个实施例中，医疗成像系统包括具有远端和近端的细长管状构件，构造成插入患者容器中，联接到细长管状构件的远端的成像装置和电连接到 成像装置，其中所述控制台包括电耦合到所述成像装置的计算机可用介质，所述计算机可用介质具有指令序列，所述指令序列在由处理器执行时使所述处理器执行包括生成所述容器的图像的处理，以及 将一个或多个形状覆盖到图像时代上以提供将要施加在患者体内的医疗装置的尺寸和位置的视觉近似。

公开(公告)号：US07892177B2

公开(公告)日：2011-02-22

申请号：US11069206

申请日：2005-02-28

申请人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

发明人： Michael D. Rold ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

IPC分类号： A61B8/12

CPC分类号： A61B8/463 ,  A61B8/12

摘要： The field of the invention relates to medical imaging systems, and more particularly to systems and methods for estimating the size and position of a stent or other medical device within a patient. In one embodiment, a medical imaging system includes an elongated tubular member having distal and proximal ends, configured to be inserted into a vessel of a patient, an imaging device coupled to the distal end of the elongated tubular member and configured to emit one or more energy pulses and receive one or more echo signals, and a console electrically coupled to the imaging device, wherein the console includes a computer-usable medium, electrically coupled to the imaging device, having a sequence of instructions which, when executed by a processor, causes said processor to execute a process including generating an image of the vessel, and providing a graphical representation of a stent to be overlaid onto the image.

摘要翻译： 本发明的领域涉及医学成像系统，更具体地涉及用于估计患者内的支架或其他医疗装置的尺寸和位置的系统和方法。 在一个实施例中，医疗成像系统包括具有远端和近端的细长管状构件，构造成插入患者容器中;成像装置，其联接到细长管状构件的远端并且构造成发射一个或多个 能量脉冲并接收一个或多个回波信号，以及控制台，其电耦合到所述成像装置，其中所述控制台包括电耦合到所述成像装置的计算机可用介质，所述计算机可用介质具有指令序列，当由处理器执行时， 使得所述处理器执行包括生成血管图像的过程，以及提供要覆盖在图像上的支架的图形表示。

公开(公告)号：US20100113949A1

公开(公告)日：2010-05-06

申请号：US12686565

申请日：2010-01-13

申请人： Shashidhar Sathyanarayana

发明人： Shashidhar Sathyanarayana

IPC分类号： A61B5/0285

CPC分类号： A61B5/0261 ,  A61B5/0215 ,  A61B5/0285 ,  A61B5/0456 ,  A61B8/06 ,  A61B8/12

摘要： The systems and methods described herein allow measurement of the velocity of a pulse wave propagating within a body lumen using an intravascular elongate medical device. The elongate medical device can include a data collection device configured to collect pulse wave data at a location within the lumen. The data collection device is communicatively coupled with a velocity measurement system and configured to output the collected data to the velocity measurement system. The velocity measurement system is configured to calculate the velocity of the pulse wave based on the collection data. The velocity of a pulse wave over a region of the lumen can be used for tissue characterization, diagnosis and the like.

摘要翻译： 本文描述的系统和方法允许使用血管内细长医疗装置测量在体腔内传播的脉搏波的速度。 细长医疗装置可以包括数据收集装置，其被配置为在内腔内的位置收集脉搏波数据。 数据采集​​装置与速度测量系统通信耦合，并被配置为将收集的数据输出到速度测量系统。 速度测量系统被配置为基于收集数据计算脉搏波的速度。 在腔的区域上的脉搏波的速度可用于组织表征，诊断等。

公开(公告)号：US07502525B2

公开(公告)日：2009-03-10

申请号：US10352384

申请日：2003-01-27

申请人： Shashidhar Sathyanarayana

发明人： Shashidhar Sathyanarayana

IPC分类号： G06K9/40

CPC分类号： G06K9/4604 ,  G06T7/13 ,  G06T7/194 ,  G06T2207/10072 ,  G06T2207/10132 ,  G06T2207/30004

摘要： The improved system and method detects edges in an image defined by a data set. In one aspect, a plurality of arrays of pattern recognition classifiers are populated throughout an image. Each array may yield a value which indicates whether or not the array is on or near an edge to be detected. The edge may be interpolated between the arrays that are on or near an edge to be detected or extrapolated after an array on or near the edge. This edge detection method may result in more accurate edge detection.

摘要翻译： 改进的系统和方法检测由数据集定义的图像中的边缘。 在一个方面，在整个图像中填充多个模式识别分类器阵列。 每个阵列可以产生一个值，该值指示阵列是否在要检测的边缘上或附近。 在边缘上或附近的阵列之后，边缘可以在要被检测或外推的边缘上或附近的阵列之间插值。 该边缘检测方法可能导致更准确的边缘检测。

公开(公告)号：US07460716B2

公开(公告)日：2008-12-02

申请号：US10940359

申请日：2004-09-13

申请人： Shashidhar Sathyanarayana

发明人： Shashidhar Sathyanarayana

IPC分类号： G06K9/62

CPC分类号： G06K9/6292

摘要： The systems and methods can apply a plurality of different classifiers to a given input image instead of a single classifier. The plurality of classifiers produce a plurality of classified images based on the input image, which are sequentially displayed to a human observer. The sequential display of the classified images produces a dynamic classified image, in which the classification of the input image varies with time depending on which one of the classified image is displayed at a given instant. The dynamic classified image provides dynamic stimuli that encourages the human visual system to excuse occasional classification errors from a minority of the classified images and to retain generally correct classifications from a majority of the classified images.

摘要翻译： 系统和方法可以将多个不同的分类器应用于给定的输入图像而不是单个分类器。 多个分类器基于输入图像产生多个分类图像，其被依次显示给人类观察者。 分类图像的顺序显示产生动态分类图像，其中输入图像的分类根据在给定时刻显示分类图像中的哪一个而随时间变化。 动态分类图像提供动态刺激，其鼓励人类视觉系统从少数分类图像中排除偶尔的分类错误，并且从大多数分类图像中保留一般正确的分类。

公开(公告)号：US20080123911A1

公开(公告)日：2008-05-29

申请号：US11535441

申请日：2006-09-26

申请人： Duc Lam ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

发明人： Duc Lam ,  Shashidhar Sathyanarayana ,  Tat-Jin Teo

IPC分类号： G06K9/00

CPC分类号： A61B8/4461 ,  A61B5/02007 ,  A61B8/0858 ,  A61B8/12 ,  A61B8/445 ,  G01S7/5205 ,  G01S15/894 ,  G01S15/8977 ,  G06T5/006 ,  G06T2207/30101

摘要： The field of the invention relates to medical imaging systems, and more particularly to systems and methods for restoring a medical image affected by nonuniform rotational distortion. In one embodiment, an imaging system includes an imaging catheter having proximal and distal sections, an imaging device coupled to the distal section of the imaging catheter, said imaging device configured to rotate at a uniform angular velocity, and a processor electrically coupled to imaging device, said processor configured to generate a plurality of vectors as the imaging device rotates to form a medical image, estimate an instantaneous angular velocity of the imaging device as the imaging device rotates, and remap the plurality of vectors in the event that the estimated instantaneous angular velocity differs from the uniform angular velocity.

摘要翻译： 本发明的领域涉及医学成像系统，更具体地涉及用于恢复受不均匀旋转失真影响的医学图像的系统和方法。 在一个实施例中，成像系统包括具有近端部分和远端部分的成像导管，耦合到成像导管的远端部分的成像装置，所述成像装置被配置为以均匀的角速度旋转;以及处理器，电耦合到成像装置 所述处理器被配置为当成像设备转动以形成医学图像时生成多个向量，估计成像设备旋转时的成像设备的瞬时角速度，并且在估计的瞬时角度的情况下重映射多个向量 速度与均匀的角速度不同。