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1. 发明申请

US20090154787A1 IMAGE RECONSTRUCTION DEVICE AND METHOD 审中-公开
标题翻译：图像重建装置和方法
公开(公告)号：US20090154787A1
公开(公告)日：2009-06-18
申请号：US11719554
申请日：2005-11-22
申请人： Matthias Bertram , Til Aach , Georg Hans Rose , Dirk Schaefer
发明人： Matthias Bertram , Til Aach , Georg Hans Rose , Dirk Schaefer
IPC分类号： G06K9/00
CPC分类号： G06T11/005
摘要： The present invention relates to an image reconstruction device and a corresponding method for reconstructing a 3D image of an object (7) from projection data of said object (7). In order to obtain 3D images having sharp high-contrast structures and almost no image blur, and in which streak artifacts (and noise in tissue-like regions) are strongly reduced, an image reconstruction device is proposed comprising: a first reconstruction unit (30) for reconstructing a first 3D image of said object (7) using the original projection data, an interpolation unit (31) for calculating interpolated projection data from said original projection data, —a second reconstruction unit (32) for reconstructing a second 3D image of said object (7) using at least the interpolated projection data, a segmentation unit (33) for segmentation of the first or second 3D image into high-contrast and low-contrast areas, a third reconstruction unit (34) for reconstructing a third 3D image from selected areas of said first and said second 3D image, wherein said segmented 3D image is used to select image values from said first 3D image for high-contrast areas and image values from said second 3D image for low-contrast areas.
摘要翻译：本发明涉及一种从所述物体（7）的投影数据重建物体（7）的3D图像的图像重建装置和相应的方法。为了获得具有锐利的高对比度结构并且几乎没有图像模糊的3D图像，并且其中强烈减少了条纹伪影（和组织样区域中的噪声），提出了一种图像重建装置，包括：第一重建单元（30 ），用于使用原始投影数据重建所述对象（7）的第一3D图像;内插单元（31），用于从所述原始投影数据计算内插投影数据;第二重建单元（32），用于重建第二3D图像使用至少内插投影数据的分割单元（33），用于将第一或第二3D图像分割为高对比度和低对比度区域的分割单元（33），用于重建第三或第二3D图像的第三重建单元所述第一和第二3D图像的所选区域的3D图像，其中所述分割的3D图像用于从所述第一3D图像中选择用于高对比度区域的图像值，并且来自所述第二3D图像的图像值 D图像用于低对比度区域。

2. 发明申请

US20050207538A1 Method of determining an image from an image sequence 审中-公开
标题翻译：从图像序列确定图像的方法
公开(公告)号：US20050207538A1
公开(公告)日：2005-09-22
申请号：US10509457
申请日：2003-04-01
申请人： Sabine Mollus , Ingo Stuke , Kai Eck , Til Aach
发明人： Sabine Mollus , Ingo Stuke , Kai Eck , Til Aach
IPC分类号： A61B6/00 , A61B8/08 , G06T7/00 , G06T7/20 , H01J35/10 , H01J35/24 , H01J35/28
CPC分类号： A61B6/541 , G06T7/38 , G06T2207/30048
摘要： The invention relates to a method of determining a corresponding image of a moving object for a reference image from an image sequence which represents the motion as a sequence of states of motion. To this end, two motion signals, representing the development of the relevant motions, are examined for similarities. Using the similarity function thus obtained, that image in the image sequence can be determined which represents at least approximately the state of motion of the object which is represented in the reference image. Furthermore, the invention relates to a system which is suitable for carrying out the method as well as to a computer program and a computer program product enabling a data processing unit to carry out the method.
摘要翻译：本发明涉及一种从表示运动的图像序列确定参考图像的移动物体的对应图像的方法，该图像序列是运动状态序列。为此，审查了相关动议的两个运动信号，以表达相似的动议。使用如此获得的相似度函数，可以确定图像序列中的至少近似表示在参考图像中的对象的运动状态的图像。此外，本发明涉及一种适合于执行该方法的系统，以及一种能使数据处理单元执行该方法的计算机程序和计算机程序产品。

3. 发明申请

US20110164127A1 METHOD AND ENDOSCOPE FOR IMPROVING ENDOSCOPE IMAGES 审中-公开
标题翻译：用于改善内窥镜图像的方法和内窥镜
公开(公告)号：US20110164127A1
公开(公告)日：2011-07-07
申请号：US12997432
申请日：2009-06-10
申请人： Thomas Stehle , Til Aach
发明人： Thomas Stehle , Til Aach
IPC分类号： H04N7/18
CPC分类号： H04N9/045 , A61B1/00009 , A61B1/042 , A61B1/043 , A61B5/0071 , A61B5/0084 , H04N9/67 , H04N2005/2255
摘要： A method for improving endoscope images of, in part, fluorescent tissue regions which are illuminated with background light, which images are recorded by a color video camera wherein the color pixels from the endoscope images are transformed from the color space of the video camera (3) into a color space in which a straight line which passes through the color space region of the fluorescent light and the color space region of the background light runs parallel to a coordinate axis describing the fluorescent component of the pixels, and in that, in this color space, the fluorescent component of the pixels is changed by a non-linear characteristic which at least in regions increases the fluorescent contrast, namely the difference between higher fluorescent values and lower fluorescent values, and in that, finally, the pixels are transformed into a color space suitable for imaging.
摘要翻译：一种用于改善部分由背景光照射的荧光组织区域的内窥镜图像的方法，所述图像由彩色摄像机记录，其中来自内窥镜图像的彩色像素从摄像机（3）的颜色空间）到通过荧光的颜色空间区域的直线和背景光的颜色空间区域的直线平行于描述像素的荧光分量的坐标轴延伸的颜色空间，并且在该空间中色彩空间中，像素的荧光成分被非线性特性改变，至少在区域增加了荧光对比度，即较高的荧光值和较低荧光值之间的差异，并且最终将像素转换成适合成像的色彩空间。

4. 发明申请

US20080284845A1 METHOD AND APPARATUS TO PROCESS ENDOSCOPE IMAGES 审中-公开
标题翻译：方法和装置处理内窥镜图像
公开(公告)号：US20080284845A1
公开(公告)日：2008-11-20
申请号：US12120446
申请日：2008-05-14
申请人： Til Aach , Thomas Stehle
发明人： Til Aach , Thomas Stehle
IPC分类号： A61B1/04 , H04N7/18
CPC分类号： H04N9/67 , A61B1/042 , G06T5/009 , G06T5/40 , G06T2207/10024 , G06T2207/10068
摘要： The invention relates to a method improving the images in an image processing unit (5) receiving images from an electronic color video camera (3) of a medical endoscope (1) and then transmitting them to an image display unit (7), and to an endoscope operating on the basis of the said method, where first the pixels of the color components (RGB) are individually mapped into a color space (HSL) wherein the color saturation (S) is independent of the other components (H, L), thereupon the saturation component (S) of each pixel to be mapped is converted by means of a nonlinear mapping function (11) which amplifies the color saturation differential between an upper zone (b->1) and a lower zone (0-b) of the color saturation, lastly the pixels being remapped into an (RGB) color space suitable for image display.
摘要翻译：本发明涉及一种改善图像处理单元（5）中的图像的方法，该图像处理单元（5）从医用内窥镜（1）的电子彩色摄像机（3）接收图像，然后将其发送到图像显示单元（7），并且基于所述方法操作的内窥镜，其中首先将颜色分量（RGB）的像素分别映射到颜色空间（HSL），其中色彩饱和度（S）与其他分量（H，L）无关，因此，通过非线性映射函数（11）来转换要映射的每个像素的饱和分量（S），该非线性映射函数放大上区（b→1）和下区（0-b）之间的色饱和度差）的颜色饱和度，最后将像素重新映射成适合于图像显示的（RGB）颜色空间。

5. 发明授权

US5654772A Method for change detection in moving images 失效
标题翻译：移动图像中变化检测的方法
公开(公告)号：US5654772A
公开(公告)日：1997-08-05
申请号：US360715
申请日：1994-12-12
申请人： Rudolf Mester , Til Aach
发明人： Rudolf Mester , Til Aach
IPC分类号： H04N5/232 , G06T1/00 , G06T7/20 , H04N7/18
CPC分类号： G06K9/00785 , G06T7/20 , G06T7/2013 , G06T7/2053 , G06T2207/10016
摘要： A method and system for detecting changes in moving images, wherein the system includes an image pick-up unit (3), an arithmetic unit (1), and a storage device (2). The image pick-up unit (3) records images by pixels. The arithmetic unit (1) files the video signals by pixels in the storage device (2). The arithmetic unit (1) calculates the change in the video signals of the blocks of the image n+1 with reference to the preceding image n. Different values are assigned to the blocks depending on whether the change is larger or smaller than a threshold, i.e., depending on whether the blocks are supposed to be treated further as changed or not changed. The threshold becomes all the lower the more adjacent blocks that have been designated as changed when compared to their thresholds.
摘要翻译： PCT No.PCT / DE94 / 00385 Sec。 371日期1994年12月12日第 102（e）日期1994年12月12日PCT 1994年4月7日PCT PCT。第WO94 / 24634号公报日期：1994年10月27日一种用于检测运动图像变化的方法和系统，其中系统包括图像拾取单元（3），运算单元（1）和存储装置（2）。图像拾取单元（3）以像素记录图像。算术单元（1）通过像素在存储装置（2）中记录视频信号。算术单元（1）参照前一图像n计算图像n + 1的块的视频信号的变化。取决于该变化是大于还是小于阈值，即取决于是否将块进一步处理为改变或不改变，将不同的值分配给块。阈值变为与其阈值相比被指定为更改的更邻近块的所有较低者。

6. 发明授权

US06760401B2 Apparatus and method for processing of digital images 失效
标题翻译：数字图像处理装置及方法
公开(公告)号：US06760401B2
公开(公告)日：2004-07-06
申请号：US10215692
申请日：2002-08-09
申请人： Georg Schmitz , Til Aach , Peter Maria Johannes Rongen , Herman Stegehuis
发明人： Georg Schmitz , Til Aach , Peter Maria Johannes Rongen , Herman Stegehuis
IPC分类号： G01N23083
CPC分类号： G06T5/50 , G06T7/0012 , G06T2207/30101
摘要： This invention relates to an apparatus and method for improved display of small dark structures such as in particular coronary blood vessels in digital X-ray images. A live image (S) is initially subjected to multiscale decomposition in which firstly multiple uses of low pass filtering with subsequent resolution reduction (RED), and secondly resolution increases using subsequent low pass filtration (EXP), give detailed images (D1, D2, D3, D4) of different resolution. In accordance with the first variant of the method, a mask (M) representative of the uninteresting image background is subtracted from the detailed image (D4) having the lowest degree of resolution. This ensures that the subtraction will only comprise correspondingly coarse structures with dimensions greater than the expected image motion. A further improvement can be achieved by applying a motion estimation (MOT EST) and motion compensation (MOT COMP) to the mask (M) and to the detailed image (D4) of the lowest degree of resolution. The detailed images (D1-D4) may be multiplied by factors (c2) before they are combined to form the overall image (G). For this purpose, asymmetrical intensification functions are preferably used, so that negative contrast values corresponding to small dark structures can be intensified and positive contrast values can be suppressed.
摘要翻译：本发明涉及一种用于改进数字X射线图像中特别是冠状血管的小黑暗结构的显示的装置和方法。实时图像（S）最初经受多尺度分解，其中首先多次使用低通滤波，随后进行分辨率降低（RED），其次分辨率随后的低通滤波（EXP）增加，给出详细图像（D1，D2， D3，D4）不同分辨率。根据该方法的第一变型，从具有最低分辨率的详细图像（D4）中减去代表不感兴趣的图像背景的掩码（M）。这确保了减法将仅包括具有大于预期图像运动的尺寸的对应粗略结构。另外，通过将运动估计（MOT EST）和运动补偿（MOT COMP）应用于最低分辨率的掩模（M）和详细图像（D4）可以实现进一步的改进。详细图像（D1-D4）可以在它们组合之前乘以因子（c2）以形成整体图像（G）。为此，优选使用非对称增强功能，从而可以增强对应于小暗结构的负对比度值，并且可以抑制正对比度值。

7. 发明授权

US6049623A Directional adaptive noise reduction 失效
标题翻译：定向自适应降噪
公开(公告)号：US6049623A
公开(公告)日：2000-04-11
申请号：US770389
申请日：1996-12-20
申请人： Miha Fuderer , Til Aach , Dietmar W. Kunz
发明人： Miha Fuderer , Til Aach , Dietmar W. Kunz
IPC分类号： A61B5/055 , G06T1/00 , G06T5/00 , G06T5/20 , G06T7/20 , G06K9/00
CPC分类号： G06T5/20 , G01R33/5608
摘要： An image is processed taking into account the direction of a predominant structure of the image. Said predominant direction is derived from image information in the image. In particular, the covariance matrix having matrix elements depending on products of differences between pixel-values in separate directions is calculated. The eigenvectors of the covariance matrix correspond with the predominant direction of the image structure and the eigenvalues of the covariance matrix represent the strength of the structure in the image. The covariance matrix is computed locally, i.e. for separate regions in the images so as to take variations of the direction of predominant structures into account.
摘要翻译：考虑到图像的主要结构的方向来处理图像。所述主要方向来源于图像中的图像信息。特别地，计算具有取决于分离方向上的像素值之间的差的乘积的矩阵元素的协方差矩阵。协方差矩阵的特征向量与图像结构的主要方向对应，协方差矩阵的特征值表示图像中结构的强度。局部计算协方差矩阵，即为图像中的单独区域计算，以便考虑主要结构方向的变化。

8. 发明授权

US5825846A Noise reduction in an image 失效
标题翻译：图像中的降噪
公开(公告)号：US5825846A
公开(公告)日：1998-10-20
申请号：US770363
申请日：1996-12-20
申请人： Til Aach , Dietmar W. Kunz
发明人： Til Aach , Dietmar W. Kunz
IPC分类号： H04N5/21 , G06T5/20 , H05G1/64
CPC分类号： G06T5/20
摘要： In a method of processing an image the image is divided in one or more blocks. Separate blocks are spatially frequency transformed in that pixel-values of the blocks are transformed into spectral coefficients. A noise level of the image is estimated and reduced spectral coefficients are derived from spectral coefficients and the estimated noise level. Pixel-values for a processed block are synthesized from the reduced spectral coefficients and the processed blocks are assembled into a processed image. The noise level is estimated from the image information within the image. Preferably, a few parameters relating to the circumstances under which the image was acquired are also taken into account for estimating the noise level.
摘要翻译：在处理图像的方法中，图像被划分成一个或多个块。单独的块是空间频率变换的，因为块的像素值被变换为频谱系数。估计图像的噪声电平，并且从频谱系数和估计的噪声电平导出频谱系数的减小。经处理的块的像素值从缩小的频谱系数合成，并且处理的块被组合成经处理的图像。根据图像中的图像信息估计噪声水平。优选地，还考虑与获取图像的情况有关的几个参数，以估计噪声水平。

9. 发明申请

US20070003121A1 Automatic contrast medium control in images 审中-公开
标题翻译：图像自动造影剂控制
公开(公告)号：US20070003121A1
公开(公告)日：2007-01-04
申请号：US10596921
申请日：2005-01-06
申请人： Til Aach , Alexandru Condurache , Kai Eck , Jorg Bredno
发明人： Til Aach , Alexandru Condurache , Kai Eck , Jorg Bredno
IPC分类号： G06K9/00
CPC分类号： G06T7/0012 , G06T2207/10116 , G06T2207/30104
摘要： During catheter or guide wire intervention, a road map of, for example, the coronary vessel tree based on pre-interventional angiograms is displayed. This road map, however, is naturally static and hence not consistent with the instantaneous heart and respiration cycles in the life image, which may be displayed on the screen next to the road map. According to an exemplary embodiment of the present invention, images of a series of x-ray images of an object of interest are determined, where the object of interest is not sufficiently filled with the contrast agent. Advantageously, these images may be used to provide for an improved road map.
摘要翻译：在导管或导丝介入期间，显示例如基于介入前血管造影的冠状动脉血管树的路线图。然而，该路线图自然是静态的，因此与寿命图像中的瞬时心脏和呼吸周期不一致，其可以在路线图旁边的屏幕上显示。根据本发明的示例性实施例，确定感兴趣对象的一系列x射线图像的图像，其中感兴趣的对象没有被造影剂充分地填充。有利地，这些图像可以用于提供改进的路线图。

10. 发明授权

US06295336B1 X-Ray examination apparatus with dose control 失效
标题翻译：具有剂量控制的X射线检查仪
公开(公告)号：US06295336B1
公开(公告)日：2001-09-25
申请号：US09421344
申请日：1999-10-19
申请人： Til Aach , Dietmar W. Kunz
发明人： Til Aach , Dietmar W. Kunz
IPC分类号： H05G134
CPC分类号： A61B6/542 , A61B6/5211 , A61B6/545
摘要： An x-ray examination apparatus comprises an x-ray source for generating an x-ray image and an image analysis system derives brightness variations from the x-ray image and derives a dose control signal dependent on said brightness variations in order to control the x-ray source. The image analysis system derives a distribution of said brightness variations and derives the dose control signal from the distribution of brightness variations. Preferably, the image analysis system is arranged to derive the brightness variations from the processed image and a histogram analysis is employed to derive the dose control signal.
摘要翻译： X射线检查装置包括用于产生x射线图像的X射线源，并且图像分析系统从X射线图像导出亮度变化，并且导出取决于所述亮度变化的剂量控制信号，以便控制x 来源。图像分析系统导出所述亮度变化的分布，并从亮度变化的分布中导出剂量控制信号。优选地，图像分析系统被布置成从处理的图像导出亮度变化，并且采用直方图分析来导出剂量控制信号。

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