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1. 发明申请

US20090169088A1 METHOD FOR OPERATING AN X-RAY DIAGNOSTIC APPARATUS FOR DETERMINING QUALITY VALUES 有权
标题翻译：用于确定质量值的X射线诊断装置的方法
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。

2. 发明申请

US20060126911A1 X-ray diagnostic apparatus and method for operating an x-ray diagnostic apparatus for determining quality values 有权
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.

3. 发明授权

US07826651B2 Method for operating an x-ray diagnostic apparatus for determining quality values 有权
标题翻译：用于操作用于确定质量值的x射线诊断装置的方法
公开(公告)号：US07826651B2
公开(公告)日：2010-11-02
申请号：US12401295
申请日：2009-03-10
申请人： Stefan Böhm , Peter Durlak , Volker Heer , Martin Kolarjk
发明人： Stefan Böhm , 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。

4. 发明授权

US07539336B2 X-ray diagnostic apparatus and method for operating an x-ray diagnostic apparatus for determining quality values 有权
标题翻译：用于操作用于确定质量值的X射线诊断装置的X射线诊断装置和方法
公开(公告)号：US07539336B2
公开(公告)日：2009-05-26
申请号：US11293444
申请日：2005-12-02
申请人： Stefan Böhm , Peter Durlak , Volker Heer , Martin Kolarjk
发明人： Stefan Böhm , 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.
摘要翻译：本发明涉及具有x射线管的x射线辐射器的血管造影X射线诊断装置，其中患者定位台具有辐射透明的定位板和床垫，具有x射线检测器，具有成像系统，图像处理单元和测量装置，X射线检测器的输出信号被馈送到该图像处理单元和测量装置，并且具有用于确定确定临床相关对象的再现质量的值的第一装置，用于确定临床相关对象的再现质量的第二装置，在不同X射线图像的均匀图像区域中的噪声和用于获取两个装置的输出值的比率的装置。

5. 发明授权

US07469034B2 Method for analyzing and representing x-ray projection images and x-ray examination unit 有权
标题翻译：用于分析和表示X射线投影图像和X射线检查单元的方法
公开(公告)号：US07469034B2
公开(公告)日：2008-12-23
申请号：US11409419
申请日：2006-04-21
申请人： Philipp Bernhardt , Friedrich Koch , Martin Kolarjk , Ernst Peter Rührnschopf , Helmuth Schramm
发明人： Philipp Bernhardt , Friedrich Koch , Martin Kolarjk , Ernst Peter Rührnschopf , Helmuth Schramm
IPC分类号： G01N23/04 , G01T1/36 , G01T1/161
CPC分类号： G06T11/005
摘要： The invention relates to a method and an x-ray examination unit for analyzing and representing x-ray projection images with an x-ray examination unit, where the function relation bU=ƒU−1(J˜/J0) is established between the attenuation value and a material-equivalent value as a function of the energy spectrum used, and for the purposes of projection representation, the magnitude of the material-equivalent value bU of a specific material is represented as an image value.
摘要翻译：本发明涉及一种利用X射线检查单元分析和表示X射线投影图像的方法和X射线检查单元，其中在衰减之间建立了功能关系bU = fU-1（J〜/ J0）值和材料当量值作为所使用的能谱的函数，并且为了投影表示的目的，特定材料的材料等价值bU的大小被表示为图像值。

6. 发明申请

US20060245538A1 Method for analyzing and representing x-ray projection images and x-ray examination unit 有权
标题翻译：用于分析和表示X射线投影图像和X射线检查单元的方法
公开(公告)号：US20060245538A1
公开(公告)日：2006-11-02
申请号：US11409419
申请日：2006-04-21
申请人： Philipp Bernhardt , Friedrich Koch , Martin Kolarjk , Ernst Ruhrnschopf , Helmuth Schramm
发明人： Philipp Bernhardt , Friedrich Koch , Martin Kolarjk , Ernst Ruhrnschopf , Helmuth Schramm
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005
摘要： The invention relates to a method and an x-ray examination unit for analyzing and representing x-ray projection images with an x-ray examination unit, where the function relation bU=ƒU−1(J˜/J0) is established between the attenuation value and a material-equivalent value as a function of the energy spectrum used, and for the purposes of projection representation, the magnitude of the material-equivalent value bU of a specific material is represented as an image value.
摘要翻译：本发明涉及一种利用X射线检查单元分析和表示X射线投影图像的方法和X射线检查单元，其中函数关系b < 在衰减值和材料等价值之间建立起来作为/ 所使用的能量谱，并且为了投影表示的目的，特定材料的材料等价值b U U N的大小被表示为图像值。

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