公开(公告)号：US20090097732A1

公开(公告)日：2009-04-16

申请号：US12284979

申请日：2008-09-26

申请人： Stefan Bohm ,  Peter Durlak ,  Boris Stowasser

发明人： Stefan Bohm ,  Peter Durlak ,  Boris Stowasser

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： G01N23/04 ,  A61B6/583 ,  A61B6/585 ,  G06K9/40 ,  G06T5/002 ,  G06T5/10 ,  G06T5/50 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/10116 ,  G06T2207/20064 ,  G06T2207/30004

摘要： The invention relates to a method for presentation of medical images by a reproduction facility of a diagnostic device with suppression of the noise with the following steps: one-off calibration of the signal-dependent noise; separation of the signal and noise components in the image; adaptation of the two components according to set parameters; and composition of the signals.

摘要翻译： 本发明涉及一种用于通过具有抑制噪声的诊断装置的再现设施呈现医学图像的方法，其具有以下步骤：信号相关噪声的一次性校准; 分离图像中的信号和噪声分量; 根据设定参数对两个部件进行调整; 和信号的组成。

公开(公告)号：US08126248B2

公开(公告)日：2012-02-28

申请号：US12284979

申请日：2008-09-26

申请人： Stefan Böhm ,  Peter Durlak ,  Boris Stowasser

发明人： Stefan Böhm ,  Peter Durlak ,  Boris Stowasser

IPC分类号： G06K9/00

CPC分类号： G01N23/04 ,  A61B6/583 ,  A61B6/585 ,  G06K9/40 ,  G06T5/002 ,  G06T5/10 ,  G06T5/50 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/10116 ,  G06T2207/20064 ,  G06T2207/30004

摘要： The invention relates to a method for presentation of medical images by a reproduction facility of a diagnostic device with suppression of the noise with the following steps: one-off calibration of the signal-dependent noise; separation of the signal and noise components in the image; adaptation of the two components according to set parameters; and composition of the signals.

摘要翻译： 本发明涉及一种用于通过具有抑制噪声的诊断装置的再现设施呈现医学图像的方法，其具有以下步骤：信号相关噪声的一次性校准; 分离图像中的信号和噪声分量; 根据设定参数对两个部件进行调整; 和信号的组成。

公开(公告)号：US20090080728A1

公开(公告)日：2009-03-26

申请号：US12229663

申请日：2008-08-26

申请人： Richard Socher ,  Adrian Barbu ,  Bogdan Georgescu ,  Wei Zhang ,  Peter Durlak ,  Stefan Bohm ,  Dorin Comaniciu

发明人： Richard Socher ,  Adrian Barbu ,  Bogdan Georgescu ,  Wei Zhang ,  Peter Durlak ,  Stefan Bohm ,  Dorin Comaniciu

IPC分类号： G06K9/00

CPC分类号： G06K9/6256 ,  G06K2009/00932 ,  G06T7/12 ,  G06T7/162 ,  G06T2207/10121 ,  G06T2207/30048 ,  G06T2207/30101

摘要： A method and system for vessel segmentation in fluoroscopic images is disclosed. Hierarchical learning-based detection is used to perform the vessel segmentation. A boundary classifier is trained and used to detect boundary pixels of a vessel in a fluoroscopic image. A cross-segment classifier is trained and used to detect cross-segments connecting the boundary pixels. A quadrilateral classifier is trained and used to detect quadrilaterals connecting the cross segments. Dynamic programming is then used to combine the quadrilaterals to generate a tubular structure representing the vessel.

摘要翻译： 公开了一种用于荧光镜图像中血管分割的方法和系统。 使用基于层次学习的检测来执行血管分割。 边界分类器被训练并用于检测透视图像中血管的边界像素。 训练跨段分类器，用于检测连接边界像素的交叉段。 四边形分类器被训练并用于检测连接横截面的四边形。 然后使用动态规划来组合四边形以产生代表该容器的管状结构。

公开(公告)号：US20090169088A1

公开(公告)日：2009-07-02

申请号：US12401295

申请日：2009-03-10

申请人： Stefan Bohm ,  Peter Durlak ,  Volker Heer ,  Martin Kolarjk

发明人： Stefan Bohm ,  Peter Durlak ,  Volker Heer ,  Martin Kolarjk

IPC分类号： G06K9/00

CPC分类号： G06T7/0002 ,  A61B6/504 ,  A61B6/583 ,  H04N5/325 ,  Y10S128/922

摘要： A method for checking an x-ray diagnostic apparatus is provided. Fluoroscopic series of x-ray images of a technical phantom are digitally acquired and stored. Difference between a dynamic image and a background image is calculated. A measuring field is predicted. Priori information about the shape of a clinically relevant object is determined. Hough transformation on a gray value image corresponding to the difference is applied. Contrast of the object from the Hough-transformed gray value image is determined. A square of the determined contrast is calculated. A noise variance is calculated by determining a sum of a noise variance of a homogenous image region and a variance of the background image. A contrast-to-noise ratio of the determined contrast and the calculated noise variance is determined. A square of the contrast-to-noise ratio is dynamically averaged. A Clinical Relevant Fluoroscopy Performance index for the x-ray diagnostic apparatus is determined.

摘要翻译： 提供了一种用于检查x射线诊断装置的方法。 数字获取和存储技术幻像的荧光系列X射线图像。 计算动态图像和背景图像之间的差异。 预测测量场。 确定关于临床相关对象的形状的优先信息。 应用与差异对应的灰度值图像上的霍夫变换。 确定来自霍夫变换灰度值图像的对象的对比度。 计算确定的对比度的平方。 通过确定均匀图像区域的噪声方差和背景图像的方差的和来计算噪声方差。 确定所确定的对比度和所计算的噪声方差的对比噪声比。 动态平均对比噪声比的平方。 确定X线诊断仪的临床相关荧光检查性能指标。

公开(公告)号：US20090080756A1

公开(公告)日：2009-03-26

申请号：US12283357

申请日：2008-09-11

申请人： Ti-chiun Chang ,  Yunqiang Chen ,  Tong Fang ,  Sandra Martin ,  Stefan Bohm ,  Peter Durlak

发明人： Ti-chiun Chang ,  Yunqiang Chen ,  Tong Fang ,  Sandra Martin ,  Stefan Bohm ,  Peter Durlak

IPC分类号： G06K9/00

CPC分类号： G06K9/346 ,  G06K2209/05 ,  G06T5/005 ,  G06T5/20 ,  G06T2207/10116 ,  G06T2207/20012 ,  G06T2207/20076 ,  G06T2207/30004

摘要： A method and system for correcting butting artifacts in x-ray images is disclosed. In order to correct a butting artifact in an x-ray image, a butting artifact region in the x-ray image is normalized. Multiple intensity shift estimators are calculated for each pixel of each line of the butting artifact. Confidence intervals are calculated for each intensity shift estimator. A multiple hypothesis hidden Markov model (MH-HMM) is formulated based on the intensity shift operators and confidence measures subject to a smoothness constraint, and the MH-HMM is solved to determine intensity shift values for each pixel. A corrected image is generated by adjusting the intensity of each pixel of the butting artifact based on the intensity shift value for that pixel.

摘要翻译： 公开了一种用于校正X射线图像中的伪像的方法和系统。 为了校正X射线图像中的对接伪影，对x射线图像中的对接伪影区域进行归一化。 针对对接工件的每一行的每个像素计算多个强度偏移估计量。 为每个强度偏移估计器计算置信区间。 基于强度偏移算子和基于平滑度约束的置信度度度，制定了多重假设隐马尔可夫模型（MH-HMM），并求解了MH-HMM，以确定每个像素的强度偏移值。 通过基于该像素的强度偏移值调整对接伪影的每个像素的强度来生成校正图像。

公开(公告)号：US20080275335A1

公开(公告)日：2008-11-06

申请号：US12150816

申请日：2008-05-01

申请人： Wei Zhang ,  Ying Zhu ,  Adrian Barbu ,  Richard Socher ,  Stefan Bohm ,  Peter Durlak ,  Dorin Comaniciu

发明人： Wei Zhang ,  Ying Zhu ,  Adrian Barbu ,  Richard Socher ,  Stefan Bohm ,  Peter Durlak ,  Dorin Comaniciu

IPC分类号： A61B5/05 ,  G06K9/00

CPC分类号： G06K9/3216 ,  A61B6/12 ,  A61B6/481 ,  A61B6/504 ,  G06K2009/00932 ,  G06K2209/05 ,  G06T7/12 ,  G06T2207/20044 ,  G06T2207/30101 ,  G06T2207/30172

摘要： A virtual map of vessels of interest in medical procedures, such as coronary angioplasty is created so that doses of contrasting agent given to a patient may be reduced. A position of a coronary guidewire is determined and locations of vessel boundaries are found. When the contrast agent has dissipated, virtual maps of the vessels are created as new images. The locations of the determined vessel boundaries are imported to a mapping system and an image obtained without using a contrast agent is modified based on the imported locations of vessel boundaries. This creates a virtual map of the vessels.

摘要翻译： 创建医疗程序感兴趣的血管的虚拟地图，例如冠状动脉血管成形术，以便减少给予患者的剂量的造影剂。 确定冠状导丝的位置并找到血管边界的位置。 当造影剂消散时，血管的虚拟地图被创建为新的图像。 确定的容器边界的位置被导入到映射系统，并且基于导入的容器边界的位置来修改不使用造影剂获得的图像。 这将创建一个血管的虚拟地图。

公开(公告)号：US20060126911A1

公开(公告)日：2006-06-15

申请号：US11293444

申请日：2005-12-02

申请人： Stefan Bohm ,  Peter Durlak ,  Volker Heer ,  Martin Kolarjk

发明人： Stefan Bohm ,  Peter Durlak ,  Volker Heer ,  Martin Kolarjk

IPC分类号： G06K9/00

CPC分类号： G06T7/0002 ,  A61B6/504 ,  A61B6/583 ,  H04N5/325 ,  Y10S128/922

摘要： The invention relates to an angiographic x-ray diagnostic apparatus with an x-ray radiator having an x-ray tube, with a patient positioning table having a radiation-transparent positioning plate and mattress, with an x-ray detector, with an imaging system, an image processing unit and a measuring device to which the output signals of the x-ray detector are fed and which has a first device for determining a value determining the reproduction quality of clinically relevant objects, a second device for determining local variances of the noise in a homogenous image region of different x-ray images and a device for taking the ratio of the output values of the two devices.

公开(公告)号：US08121367B2

公开(公告)日：2012-02-21

申请号：US12229663

申请日：2008-08-26

申请人： Richard Socher ,  Adrian Barbu ,  Bogdan Georgescu ,  Wei Zhang ,  Peter Durlak ,  Stefan Böhm ,  Dorin Comaniciu

发明人： Richard Socher ,  Adrian Barbu ,  Bogdan Georgescu ,  Wei Zhang ,  Peter Durlak ,  Stefan Böhm ,  Dorin Comaniciu

IPC分类号： G06K9/00

CPC分类号： G06K9/6256 ,  G06K2009/00932 ,  G06T7/12 ,  G06T7/162 ,  G06T2207/10121 ,  G06T2207/30048 ,  G06T2207/30101

摘要： A method and system for vessel segmentation in fluoroscopic images is disclosed. Hierarchical learning-based detection is used to perform the vessel segmentation. A boundary classifier is trained and used to detect boundary pixels of a vessel in a fluoroscopic image. A cross-segment classifier is trained and used to detect cross-segments connecting the boundary pixels. A quadrilateral classifier is trained and used to detect quadrilaterals connecting the cross segments. Dynamic programming is then used to combine the quadrilaterals to generate a tubular structure representing the vessel.

摘要翻译： 公开了一种用于荧光镜图像中血管分割的方法和系统。 使用基于层次学习的检测来执行血管分割。 边界分类器被训练并用于检测透视图像中血管的边界像素。 训练跨段分类器，用于检测连接边界像素的交叉段。 四边形分类器被训练并用于检测连接横截面的四边形。 然后使用动态规划来组合四边形以产生代表该容器的管状结构。

公开(公告)号：US08073191B2

公开(公告)日：2011-12-06

申请号：US12283357

申请日：2008-09-11

申请人： Ti-chiun Chang ,  Yunqiang Chen ,  Tong Fang ,  Sandra Martin ,  Stefan Böhm ,  Peter Durlak

发明人： Ti-chiun Chang ,  Yunqiang Chen ,  Tong Fang ,  Sandra Martin ,  Stefan Böhm ,  Peter Durlak

IPC分类号： G06K9/00

CPC分类号： G06K9/346 ,  G06K2209/05 ,  G06T5/005 ,  G06T5/20 ,  G06T2207/10116 ,  G06T2207/20012 ,  G06T2207/20076 ,  G06T2207/30004

摘要： A method and system for correcting butting artifacts in x-ray images is disclosed. In order to correct a butting artifact in an x-ray image, a butting artifact region in the x-ray image is normalized. Multiple intensity shift estimators are calculated for each pixel of each line of the butting artifact. Confidence intervals are calculated for each intensity shift estimator. A multiple hypothesis hidden Markov model (MH-HMM) is formulated based on the intensity shift operators and confidence measures subject to a smoothness constraint, and the MH-HMM is solved to determine intensity shift values for each pixel. A corrected image is generated by adjusting the intensity of each pixel of the butting artifact based on the intensity shift value for that pixel.

摘要翻译： 公开了一种用于校正X射线图像中的伪像的方法和系统。 为了校正X射线图像中的对接伪影，对x射线图像中的对接伪影区域进行归一化。 针对对接工件的每一行的每个像素计算多个强度偏移估计量。 为每个强度偏移估计器计算置信区间。 基于强度偏移算子和基于平滑度约束的置信度度度，制定了多重假设隐马尔可夫模型（MH-HMM），并求解了MH-HMM，以确定每个像素的强度偏移值。 通过基于该像素的强度偏移值调整对接伪影的每个像素的强度来生成校正图像。

公开(公告)号：US08050482B2

公开(公告)日：2011-11-01

申请号：US11860588

申请日：2007-09-25

申请人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Dorin Comaniciu

发明人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Dorin Comaniciu

IPC分类号： G06K9/00

CPC分类号： A61B6/12 ,  G06T5/002 ,  G06T5/003 ,  G06T5/20 ,  G06T2207/10121 ,  G06T2207/30021 ,  G06T2207/30048 ,  G06T2207/30101

摘要： A method for online optimization of guidewire visibility in fluoroscopic images includes providing an digitized image acquired from a fluoroscopic imaging system, the image comprising an array of intensities corresponding to a 2-dimensional grid of pixels, detecting a guidewire in the fluoroscopic image, enhancing the visibility of the guidewire in the fluoroscopic image, calculating a visibility measure of the guidewire in the fluoroscopic image, and readjusting acquisition parameters of the fluoroscopic imaging system wherein the guidewire visibility is improved.

摘要翻译： 一种用于在荧光镜图像中在线优化导丝可视性的方法包括提供从荧光成像系统获取的数字化图像，所述图像包括对应于像素的二维网格的强度阵列，检测透视图像中的导丝，增强 在透视图像中的导丝的可视性，计算透视图像中的导丝的可见度测量，以及重新调整荧光镜成像系统的获取参数，其中导丝可视性得到改善。