-
公开(公告)号：US06643392B1
公开(公告)日：2003-11-04
申请号：US09667067
申请日：2000-09-21
申请人： Régis Vaillant , Yves Trousset , Jean Lienard , Francisco Sureda
发明人： Régis Vaillant , Yves Trousset , Jean Lienard , Francisco Sureda
IPC分类号： G06K900
CPC分类号： G06T11/005 , G06T11/006 , G06T2211/404 , G06T2211/412 , G06T2211/424
摘要： A process for reconstructing a tridimensional image of an object moving with a substantially cyclic motion, for example the vessels of the human heart, in which, for an acquisition duration extending over several cycles of the movement of the object, an acquisitio of a plurality of initial digital radiographic images is performed using a snapshot apparatus rotating around the object. Initial images having the same temporal occurrence in the course of each cycle are selected respectively in successive cycles so as to form a group of images which is associated with this same temporal occurrence. Several different groups of initial images corresponding respectively to several different temporal occurrences are formed. An intermediate tridimensional representation of the object is reconstructed on the basis of each group of initial images and of an iterative image reconstruction algorithm. A law of spatial deformation between two intermediate tridimensional representations is formulated on the basis of the two intermediate tridimensional representations corresponding to two successive temporal occurrences, and a final tridimensional representation of the object is reconstructed on the basis of the initial images successively acquired, of the spatial deformation laws successively formulated and of an iterative image reconstruction algorithm.
摘要翻译： 一种用于重建以基本循环运动（例如人类心脏的血管）移动的物体的三维图像的过程，其中，对于在物体的运动的几个周期延伸的获取持续时间，获取多个 使用绕物体旋转的快照设备执行初始数字放射照相图像。 分别在连续循环中选择在每个周期的过程中具有相同时间出现的初始图像，以形成与该相同时间出现相关联的一组图像。 形成了分别对应于几个不同时间事件的几组不同的初始图像。 在每组初始图像和迭代图像重建算法的基础上重建对象的中间三维表示。 基于对应于两个连续时间出现的两个中间三维表示来形成两个中间三维表示之间的空间变形规律，并且基于连续获取的初始图像重建对象的最终三维表示 相继制定的空间变形规律和迭代图像重建算法。
-
公开(公告)号：US06549606B1
公开(公告)日：2003-04-15
申请号：US09666999
申请日：2000-09-21
申请人： Régis Vaillant , Francisco Sureda , Jean Lienard , Laurent Launay
发明人： Régis Vaillant , Francisco Sureda , Jean Lienard , Laurent Launay
IPC分类号： A61B603
CPC分类号： G06T11/005 , G06T2211/404 , Y10S378/901
摘要： Several acquisitions of digital radiographic images of an element of interest are made, by using a moving camera rotating around the element of interest in a plane parallel to the plane of a section, a matching stage is carried out in which projected elements are located in all the acquired images, corresponding respectively to the projections of the element of interest in those acquired images. The width of each projected element is determined and the section of the element of interest is reconstructed from the different widths determined.
摘要翻译： 通过使用在平行于部分的平面的平面中围绕感兴趣的元件旋转的移动相机来进行对感兴趣的元件的数字放射照相图像的几次采集，执行匹配阶段，其中投影元素位于所有 所获取的图像分别对应于那些获取的图像中的感兴趣元素的投影。 确定每个投影元素的宽度，并从所确定的不同宽度重建感兴趣元素的部分。
-
3.发明授权公开(公告)号：US06385285B1
公开(公告)日：2002-05-07
申请号：US09667210
申请日：2000-09-21
申请人： Régis Vaillant , Laurent Launay , Jean Lienard , Francisco Sureda
发明人： Régis Vaillant , Laurent Launay , Jean Lienard , Francisco Sureda
IPC分类号： A61B603
CPC分类号： G06T11/006 , G06T2211/424
摘要： Method of reconstruction of a three-dimensional image of an element of interest comprises a phase of acquisition of digital radiographic images by rotation of an camera around the organ, a phase of marking the position of the element of interest from image to image, and a phase of reconstruction of the three-dimensional image of the element of interest from acquired images and positions of the element of interest successively located in the successive images.
摘要翻译： 重建感兴趣元件的三维图像的方法包括通过相机围绕器官的旋转来获取数字放射照相图像的阶段，将图像元素的位置标记到图像的相位，以及 从所获取的图像中重建感兴趣元素的三维图像和依次位于连续图像中的感兴趣元素的位置的相位。
-
4.发明授权公开(公告)号：US06766048B1
公开(公告)日：2004-07-20
申请号：US09694229
申请日：2000-10-23
申请人： Laurent Launay , Yves Trousset , Régis Vaillant
发明人： Laurent Launay , Yves Trousset , Régis Vaillant
IPC分类号： G06K900
CPC分类号： G06T11/006 , G06T2211/404
摘要： The invention concerns a method of three-dimensional image reconstruction from a set of acquired two-dimensional images. A subsampling is taken of the set of acquired two-dimensional images so as to reduce their resolution. A first analytical algorithm of three-dimensional image reconstruction from low-resolution (LR) acquired two-dimensional images is applied in order to obtain a low-resolution three-dimensional image. A reconstruction support is determined by selecting in the low-resolution three-dimensional image a set of particular voxels. One then applies a second analytical algorithm of three-dimensional image reconstruction from acquired two-dimensional images and considering only the voxels of the reconstruction support in order to obtain the high-resolution (HR) three-dimensional image.
摘要翻译： 本发明涉及从一组获取的二维图像中的三维图像重建的方法。 对所获取的二维图像集进行子采样，以便降低它们的分辨率。 应用低分辨率（LR）获取的二维图像的三维图像重建的第一个分析算法，以获得低分辨率三维图像。 通过在低分辨率三维图像中选择一组特定的体素来确定重建支持。 然后，从采集的二维图像应用三维图像重建的第二分析算法，并且仅考虑重建支持的体素，以获得高分辨率（HR）三维图像。
-
公开(公告)号：US07327903B2
公开(公告)日：2008-02-05
申请号：US10860725
申请日：2004-06-03
CPC分类号： G06T11/005
摘要： A method and apparatus for imaging including reconstruction of an image of an object from a set of projections acquired for different positions of an acquisition apparatus around the object to be imaged and in which a projection source is situated at a finite distance relative to the acquisition apparatus. The method includes undertaking a set of rectifications of projections acquired for different positions of the acquisition apparatus, rectifications comprising transforming the data of the projection acquired projection into projection data on a virtual rectification support placed in a preset orientation in concordance with a set of reconstruction calculation points distributed over the image to be reconstructed.
摘要翻译： 一种用于成像的方法和装置，包括从针对待成像对象的采集设备的不同位置获取的一组投影中重建物体，并且其中投影源相对于采集设备位于有限的距离 。 该方法包括对采集装置的不同位置采集的投影进行一整套校正，整改包括将投影获取的投影的数据变换为以预定方向放置的虚拟整流支持的投影数据，这与重建计算集 分布在要重建的图像上的点。
-
6.发明授权Method and apparatus for determining functional parameters in a radiological apparatus 有权用于确定放射学装置中的功能参数的方法和装置公开(公告)号：US07123682B2
公开(公告)日：2006-10-17
申请号：US10721686
申请日：2003-11-25
IPC分类号： A61B6/02
CPC分类号： A61B6/4441 , A61B6/481 , A61B6/504 , A61B6/507 , A61B6/56
摘要： A method and apparatus for determining a set of functional parameters using a fluoroscopic radiography apparatus of the type comprising an X-ray source, a detector or recorder of the radiation facing the source, the source and the detector or recorder being installed on a mobile support capable of movement with respect to a table placed between the source and the detector or recorder on which a patient with a region of interest to be X-rayed will be placed. The method comprises a) movement of the support following a given movement with respect to the table, repeated during a given time; b) acquisition by the detector or recorder of a series of images of the region of interest during movement of the support with respect to the table; c) reconstitution of a series of three-dimensional models of the region of interest, starting from a series of acquired images; and d) determination of all functional parameters.
摘要翻译： 一种用于使用包括X射线源，面向源的辐射的检测器或记录器，源和检测器或记录器的类型的荧光透视摄影装置来确定一组功能参数的方法和装置，其被安装在移动支架 能够相对于放置在源和检测器或记录器之间的桌子的移动，其上将放置要被X射线照射的区域的患者。 该方法包括：a）在给定时间内重复的给定运动后支撑件相对于桌子移动; b）在支撑件相对于工作台运动期间，检测器或记录器获取感兴趣区域的一系列图像; c）从一系列获取的图像开始重构一系列感兴趣区域的三维模型; 和d）确定所有功能参数。
-
公开(公告)号：US07066646B2
公开(公告)日：2006-06-27
申请号：US10737078
申请日：2003-12-16
IPC分类号： G01D18/00
CPC分类号： A61B6/583
摘要： In the field of medical imaging minimizing the number of acquisitions required to calibrate a radiological device. Calibration of the radiological imaging device is provided by moving the device with respect to a calibration object and performing a series of acquisitions, each acquisition being associated to a calibration position of the device. Based on the acquisitions performed, determining the projection parameters associated to each calibration position of the device. For an additional position that has not been taken by the device during the acquisition, determining the projection parameter values associated to this additional position according to the parameters associated to the calibration positions.
摘要翻译： 在医学成像领域，最小化校准放射性装置所需的采集次数。 通过相对于校准对象移动设备并且执行一系列获取来提供放射性成像设备的校准，每个采集与设备的校准位置相关联。 基于执行的获取，确定与设备的每个校准位置相关联的投影参数。 对于在采集期间设备尚未采取的附加位置，根据与校准位置相关联的参数确定与该附加位置相关联的投影参数值。
-
公开(公告)号：US07242402B1
公开(公告)日：2007-07-10
申请号：US09594873
申请日：2000-06-15
CPC分类号： G06T19/00 , G06T2219/008
摘要： The invention concerns a method of visualization of a part of a three-dimensional image. The part is defined by a finite predetermined volume, a sphere, for example, the center of which is located on an element of interest present in the three-dimensional image. In order to do so, a point is selected on the element of interest, a sphere is created in the three-dimensional image, the dimensions of which are predetermined and the center of which is the point on the element of interest, an intersection is made between the sphere and the three-dimensional image, and then the part of the three-dimensional image contained in the sphere is displayed.
摘要翻译： 本发明涉及一种可视化三维图像的一部分的方法。 该部分由有限的预定体积定义，球体例如其中心位于三维图像中存在的感兴趣元素上。 为了这样做，在感兴趣的元素上选择一个点，在三维图像中创建球体，其尺寸是预定的，其中心是感兴趣元素上的点，交点是 在球体和三维图像之间形成，然后显示包含在球体中的三维图像的一部分。
-
公开(公告)号：US06320928B1
公开(公告)日：2001-11-20
申请号：US09254094
申请日：1999-03-01
申请人： Régis Vaillant , Yves Trousset , Romain Boucherie , René Romeas
发明人： Régis Vaillant , Yves Trousset , Romain Boucherie , René Romeas
IPC分类号： A61B600
CPC分类号： G06T11/006 , A61B6/583 , G06T2211/404 , G06T2211/424
摘要： A set of digital two-dimensional projected images of an object is acquired for different positions of a camera rotating around an object. The projected images are calibrated into a volume containing the object and divided into voxels, the space coordinates of which are identified in a chosen calibration frame of reference. A pretreatment is applied on each acquired image in order to elaborate a rectified image having a predetermined spatial orientation selected as a function of a chosen specific axis of the calibration frame of reference, and an iterative algorithm of algebraic image reconstruction between each rectified image and the set of voxels is applied by successively treating the voxels in a predetermined order linked to the choice of said specific axis, which makes it possible to minimize the duration of reconstruction of the three-dimensional image.
摘要翻译： 对于围绕物体旋转的相机的不同位置，获取对象的一组数字二维投影图像。 将投影图像校准成包含对象的体积并且被分成体素，其体空间坐标在选定的校准参考系中被识别。 对每个获取的图像应用预处理，以便制定具有根据校准参考系的所选择的特定轴的函数选择的具有预定空间取向的整流图像，以及每个整流图像与第二图像之间的代数图像重建的迭代算法 通过以与所述特定轴的选择相关联的预定顺序连续处理体素来应用一组体素，这使得可以最小化三维图像的重建的持续时间。
-
10.发明授权Method for processing images in interventional radioscopy to detect guiding instrumentation equipment 有权介入放射检查图像处理方法，用于检测引导仪器设备公开(公告)号：US08160318B2
公开(公告)日：2012-04-17
申请号：US12139579
申请日：2008-06-16
申请人： Vincent Bismuth , Vincent Auvray , Jean Lienard , Régis Vaillant
发明人： Vincent Bismuth , Vincent Auvray , Jean Lienard , Régis Vaillant
IPC分类号： G06K9/00
CPC分类号： G06T5/20 , G06K9/4609 , G06K2209/057
摘要： A method for processing images in interventional radioscopy for detecting guiding instrumentation equipment. The method of the invention enables objects of longilinear or very curved shapes to be detected within the radioscopic image having very low contrast to noise ratios. In one embodiment, an algorithm enables the measured contrast to noise ratio of long or curved structures in the image to be considerably improved. To do this, an embodiment of the invention uses oriented, separable, recursive and rapid steerable detection filters. Said detection filters have a low calculation cost, even for long filters having several orientations.
摘要翻译： 用于检测导向仪器设备的介入式放射检查图像处理方法。 本发明的方法能够在具有非常低的对比度噪声比的放射线图像内检测到具有长线形或非常弯曲形状的物体。 在一个实施例中，算法使得能够显着改善图像中的长或弯曲结构的测量对比度与噪声比。 为此，本发明的实施例使用定向的，可分离的，递归的和快速的可操纵的检测滤波器。 所述检测滤波器具有低的计算成本，即使对于具有多个取向的长滤波器也是如此。
-
-
-
-
-
-
-
-
-
搜索结果
25 条记录 (耗时 0.017 秒)
