专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明申请

US20080273656A1 Advanced Convergence for Multiple Iterative Algorithm 有权
标题翻译：多重迭代算法的高级收敛
公开(公告)号：US20080273656A1
公开(公告)日：2008-11-06
申请号：US12096911
申请日：2006-12-04
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： G06T11/005 , G06T2211/424
摘要： Iterative methods for reconstructing of three-dimensional images based on projection data signals obtained by a computer tomography system often result in wrong absorption coefficients in particular for regions including a hollow space of an object under examination. Furthermore iterative methods show a slow convergence for calculating such absorption coefficients. According to embodiments of the present invention there is provided a method for an advanced reconstruction of three-dimensional images based on modified projection data signals. The modification includes an addition of a constant absorption value to the measured projection data. Advantageously the constant absorption value is an absorption line integral through a virtual body having the spatial constant absorption coefficient of water. The virtual body preferably has a volume which is slightly bigger than the object of interest.
摘要翻译：基于由计算机断层摄影系统获得的投影数据信号重建三维图像的迭代方法通常导致错误的吸收系数，特别是对于包括被检查物体的中空空间的区域。此外，迭代方法显示计算这种吸收系数的缓慢收敛。根据本发明的实施例，提供了一种基于经修改的投影数据信号对三维图像进行高级重建的方法。修改包括对所测量的投影数据添加恒定的吸收值。有利地，恒定吸收值是通过具有水的空间常数吸收系数的虚拟体积分的吸收线。虚拟体优选地具有比感兴趣对象略大的体积。

32. 发明申请

US20080253502A1 Method and Device for the Iterative Reconstruction of Cardiac Images 有权
标题翻译：心脏图像迭代重建方法与装置
公开(公告)号：US20080253502A1
公开(公告)日：2008-10-16
申请号：US11908415
申请日：2006-03-09
申请人： Andy Ziegler , Michael Grass , Thomas Koehler
发明人： Andy Ziegler , Michael Grass , Thomas Koehler
IPC分类号： H05G1/60
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/424
摘要： The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneous].
摘要翻译：本发明涉及一种用于基于来自不同方向的投影（P 1，...，P 5）迭代重建病人心脏（7）的横截面图像的方法和装置，其例如用螺旋锥束CT扫描仪。心脏重量函数（f）基于同时记录的心电图信号（ECG）量化投影（P 1，...）附近到心脏周期的给定观察阶段（To）的距离。整个投影组（P 1，...）被划分成子集（S 1，...），每个子集仅包含对应于类似心脏重量（f）的投影，并且像ART这样的迭代重建算法在一个更新或迭代步骤同步所有这样的子集（S 1，...）的投影。

33. 发明申请

US20080205729A1 Method And Device For The Iterative Reconstruction Of Tomographic Ilmages 有权
标题翻译：沉积层析迭代重建方法与装置
公开(公告)号：US20080205729A1
公开(公告)日：2008-08-28
申请号：US11908294
申请日：2006-03-07
申请人： Andy Ziegler , Thomas Kohler , Roland Proksa
发明人： Andy Ziegler , Thomas Kohler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.
摘要翻译：本发明涉及一种用于从投射测量m 1 i中的对象（1）的断层图像中迭代重建衰减系数μn j i i的装置和方法。在第n次迭代期间，对于mu n 的更新等式，反向投影的误差（m i）通过体素依赖因子公式（I）加权 - （mu＆lt; j＆lt; n＆gt; n＆gt;））。这种体素相关更新可以特别地包括在ART或ML的算法中。

34. 发明授权

US09488574B2 Device for imaging the interior of an optically turbid medium and receptacle unit for such a device 有权
标题翻译：用于对用于这种装置的光学混浊介质和插座单元的内部进行成像的装置
公开(公告)号：US09488574B2
公开(公告)日：2016-11-08
申请号：US12682939
申请日：2008-10-13
申请人： Thomas Koehler , Tim Nielsen , Bernhard Brendel , Andy Ziegler , Ronny Ziegler , Levinus Pieter Bakker , Martinus Bernardus Van Der Mark
发明人： Thomas Koehler , Tim Nielsen , Bernhard Brendel , Andy Ziegler , Ronny Ziegler , Levinus Pieter Bakker , Martinus Bernardus Van Der Mark
IPC分类号： G01N21/47 , A61B5/00 , G01N21/17
CPC分类号： G01N21/4795 , A61B5/0073 , A61B5/0091 , A61B5/4312 , A61B2562/146 , G01N2021/1787 , G01N2201/0826 , G01N2201/0833
摘要： A device (1) for imaging the interior of an optically turbid medium is provided. The device comprises a receptacle (3; 103) structured to accommodate an optically turbid medium for examination and an optically matching medium filling a space between an inner surface (6; 106) of the receptacle (3; 103) and the optically turbid medium. The device comprises at least one light source generating light to be coupled into the receptacle (3; 103) and at least one detector for detecting light emanating from the receptacle (3; 103). A coupling surface (10; 110) optically coupled to the inner surface (6; 106) of the receptacle and a coupling member (11; 111) optically coupled to the light source and the detector are provided. The coupling surface (10; 110) and the coupling member (11; 111) are movable to a plurality of different positions relative to each other and structured to establish an optical connection from the light source to the inner surface (6; 106) of the receptacle and from the inner surface (6; 106) of the receptacle to the at least one detector in the plurality of different positions.
摘要翻译：提供了用于对光学混浊介质的内部成像的装置（1）。该装置包括构造成容纳用于检查的光学混浊介质的容器（3; 103）和填充容器（3; 103）的内表面（6; 106）与光学混浊介质之间的空间的光学匹配介质。所述装置包括至少一个光源，其产生要耦合到所述插座（3; 103）中的光和至少一个用于检测从所述插座（3; 103）发出的光的检测器。光耦合到容器的内表面（6; 106）的耦合表面（10; 110）和光学耦合到光源和检测器的耦合构件（11; 111）。联接表面（10; 110）和联接构件（11; 111）可以相对于彼此移动到多个不同的位置，并被构造成建立从光源到内表面（6; 106）的光学连接所述容器和所述容器的内表面（6; 106）到所述多个不同位置中的所述至少一个检测器。

35. 发明授权

US08520921B2 Method for reconstructing a fluorescent image of the interior of a turbid medium and device for imaging the interior of a turbid medium 有权
标题翻译：用于重建浑浊介质内部的荧光图像的方法和用于对浑浊介质的内部进行成像的装置
公开(公告)号：US08520921B2
公开(公告)日：2013-08-27
申请号：US12933887
申请日：2009-03-20
申请人： Ronny Ziegler , Andy Ziegler , Tim Nielsen
发明人： Ronny Ziegler , Andy Ziegler , Tim Nielsen
IPC分类号： G06K9/00
CPC分类号： A61B5/4312 , A61B5/0091 , G01N21/4795 , G01N21/6428
摘要： A method for reconstructing a fluorescence image of the interior of a turbid medium is provided. The method comprises the step: accommodating a turbid medium (1) to which a fluorescent contrast agent has been administered in a measurement volume (4). The fluorescent contrast agent is capable of emitting light in a first range of wavelengths upon irradiation with light. The method further comprises: performing attenuation measurements at a plurality of different wavelengths (λi, . . . , λk) by subsequently irradiating the turbid medium (1) with light from a plurality of different source positions and detecting light emanating from the turbid medium (1) in a plurality of detection positions for each source position; reconstructing absorption properties (μa(r, λ) as a function of the position in the interior of the turbid medium (1) for the plurality of different wavelengths from the attenuation measurements; calculating absorption properties as a function of the position in the interior of the turbid medium (1) for wavelengths of the first range of wavelengths; performing a fluorescence measurement by subsequently irradiating the turbid medium (1) with light causing the fluorescent contrast agent to emit light in the first range of wavelengths from the plurality of source positions and detecting the light emanating from the fluorescent contrast agent in the plurality of detection positions for each source position; and reconstructing a fluorescence image of the spatial distribution of the fluorescent contrast agent in the interior of the turbid medium (1) from the fluorescence measurement using the calculated absorption properties.
摘要翻译：提供了一种用于重建浑浊介质内部的荧光图像的方法。该方法包括以下步骤：在测量体积（4）中容纳已投与荧光造影剂的混浊介质（1）。荧光造影剂能够在照射光时在第一波长范围内发光。该方法还包括：通过随后用来自多个不同源位置的光照射浑浊介质（1）并检测从浑浊介质发出的光，以多个不同波长（兰德，兰布克）进行衰减测量 1）在每个源位置的多个检测位置; 根据衰减测量重建吸收性质（mu（r，λ））作为多个不同波长的混浊介质（1）内部的位置的函数;计算作为内部位置的函数的吸收特性用于波长第一波长范围的混浊介质（1）;通过随后用引起荧光对比剂的光在多个源位置发射第一波长范围内的光来照射浑浊介质来进行荧光测量以及在每个源位置的多个检测位置中检测从荧光对比剂发出的光;以及从所述荧光测量中使用所述荧光测量重建所述浑浊介质（1）内的荧光对比剂的空间分布的荧光图像，使用计算吸收性能。

36. 发明授权

US07970195B2 Method and device for the iterative reconstruction of tomographic images 有权
标题翻译：断层图像迭代重建的方法和装置
公开(公告)号：US07970195B2
公开(公告)日：2011-06-28
申请号：US11908294
申请日：2006-03-07
申请人： Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.
摘要翻译：本发明涉及一种用于从投影测量mi在物体（1）的断层图像中迭代重建衰减系数μj的装置和方法。在第n次迭代期间的μjn的更新方程中，反投影误差（mi-mi-（μjn））由体素因子因子公式（I）加权。这种体素相关更新可以特别地包括在ART或ML的算法中。

37. 发明授权

US07961839B2 Advanced convergence for multiple iterative algorithm 有权
标题翻译：多重迭代算法的高级收敛
公开(公告)号：US07961839B2
公开(公告)日：2011-06-14
申请号：US12096911
申请日：2006-12-04
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： A61B6/00
CPC分类号： G06T11/005 , G06T2211/424
摘要： Iterative methods for reconstructing of three-dimensional images based on projection data signals obtained by a computer tomography system often result in wrong absorption coefficients in particular for regions including a hollow space of an object under examination. Furthermore iterative methods show a slow convergence for calculating such absorption coefficients. According to embodiments of the present invention there is provided a method for an advanced reconstruction of three-dimensional images based on modified projection data signals. The modification includes an addition of a constant absorption value to the measured projection data. Advantageously the constant absorption value is an absorption line integral through a virtual body having the spatial constant absorption coefficient of water. The virtual body preferably has a volume which is slightly bigger than the object of interest.
摘要翻译：基于由计算机断层摄影系统获得的投影数据信号重建三维图像的迭代方法通常导致错误的吸收系数，特别是对于包括被检查物体的中空空间的区域。此外，迭代方法显示计算这种吸收系数的缓慢收敛。根据本发明的实施例，提供了一种基于经修改的投影数据信号对三维图像进行高级重建的方法。修改包括对所测量的投影数据添加恒定的吸收值。有利地，恒定吸收值是通过具有水的空间常数吸收系数的虚拟体积分的吸收线。虚拟体优选地具有比感兴趣对象略大的体积。

38. 发明申请

US20100104161A1 PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS 审中-公开
标题翻译：用于生产衰减组件的投影系统
公开(公告)号：US20100104161A1
公开(公告)日：2010-04-29
申请号：US12529715
申请日：2008-03-03
申请人： Andy Ziegler , Ewald Roessl , Roland Proksa
发明人： Andy Ziegler , Ewald Roessl , Roland Proksa
IPC分类号： G06T5/00
CPC分类号： G06T11/005 , G06T5/002 , G06T5/20 , G06T2207/10081 , G06T2207/30004
摘要： The invention relates to a projection system for producing attenuation components of projection data of a region of interest. The projection system comprises a projection data providing unit (1, 2, 6, 7, 8) for providing energy-dependent projection data of the region of interest. The projection system further comprises a calculation unit (12) for calculating different attenuation components generated by different attenuation effects from the energy-dependent projection data, wherein the different attenuation components contribute to the projection data and a transformation unit (13) for transforming the attenuation components such that a correlation of the attenuations components is reduced. The invention relates further to a corresponding projection method and a corresponding computer program.
摘要翻译：本发明涉及用于产生感兴趣区域的投影数据的衰减分量的投影系统。投影系统包括用于提供感兴趣区域的与能量相关的投影数据的投影数据提供单元（1,2,6,7,8）。投影系统还包括计算单元（12），用于根据能量相关投影数据计算由不同衰减效应产生的不同衰减分量，其中不同的衰减分量有助于投影数据;以及变换单元（13），用于变换衰减使得衰减分量的相关性降低的组件。本发明进一步涉及相应的投影方法和相应的计算机程序。

39. 发明授权

US07676018B2 Efficient iterative four-dimensional cardiac cone-beam CT reconstruction 有权
标题翻译：高效迭代四维心脏锥束CT重建
公开(公告)号：US07676018B2
公开(公告)日：2010-03-09
申请号：US12065615
申请日：2006-09-01
申请人： Michael Grass , Andy Ziegler , Tim Nielsen
发明人： Michael Grass , Andy Ziegler , Tim Nielsen
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/541 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： The increasing cone angle of current high-end and future CT systems leads to a decrease in image quality if approximate cone-beam reconstruction methods are used. According to an exemplary embodiment of the present invention, an iterative four-dimensional cardiac CT reconstruction is provided, in which phase volumes are selected from the four-dimensional data set, each having the same spatial volume at different phase points. Corresponding voxels inside these phase volumes are then forward projected onto the same projection. After calculation of a different projection, these voxels are updated. This may provide for an efficient implementation of an iterative four-dimensional cardiac cone-beam CT reconstruction.
摘要翻译：目前高端和未来CT系统锥角的增加导致使用近似锥束重建方法时图像质量下降。根据本发明的示例性实施例，提供了一种迭代的四维心脏CT重建，其中从四维数据集中选择相位体积，每个四维数据集在不同相位处具有相同的空间体积。然后将这些相位体积内的相应体素向前投影到相同的投影上。在计算了不同的投影之后，这些体素被更新。这可以提供迭代四维心脏锥束CT重建的有效实施。

40. 发明申请

US20090310737A1 METHOD FOR COMPUTER TOMOGRAPHY, AND COMPUTER TOMOGRAPH 审中-公开
标题翻译：计算机图形学和计算机图形学的方法
公开(公告)号：US20090310737A1
公开(公告)日：2009-12-17
申请号：US11721543
申请日：2005-12-13
申请人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
发明人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503
摘要： According to the invention, there is provided a method of recording images of the heart in computer tomography, in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. Also provided is a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, said computer tomograph comprising a control device which controls a radiation source with different radiation intensities for different movement states. Furthermore provided is a computer program for a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, and for controlling a radiation source with different radiation intensities for different movement states.
摘要翻译：根据本发明，提供了一种在计算机断层摄影中记录心脏图像的方法，其中为了防止运动伪像，基于心脏的相似运动状态重建图像，并且使用不同的辐射强度对于不同的运动状态。还提供了一种用于在计算机断层摄影中记录心脏图像的计算机断层摄影装置，其通过显示相似的心脏运动状态以防止运动伪像的时间窗口，所述计算机断层摄影机包括控制具有不同辐射的辐射源的控制装置不同运动状态的强度。此外还提供了一种计算机断层摄影机的计算机程序，用于通过时间窗口在计算机断层摄影中记录心脏的图像，所述时间窗口表现出相似的心脏运动状态以便防止运动伪像，并且用于控制具有不同辐射强度的辐射源不同的运动状态。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式