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1. 发明申请

US20080095313A1 Method for scattered radiation correction 有权
标题翻译：散射辐射校正方法
公开(公告)号：US20080095313A1
公开(公告)日：2008-04-24
申请号：US11906068
申请日：2007-09-28
申请人： Ernst-Peter Ruhrnschopf , Philipp Bernhardt
发明人： Ernst-Peter Ruhrnschopf , Philipp Bernhardt
IPC分类号： H05G1/64
CPC分类号： A61B6/505 , A61B6/4035 , A61B6/4291 , A61B6/482 , A61B6/50 , A61B6/5282
摘要： For scattered radiation correction in dual X-ray absorptiometry it is proposed to use the additional information supplied by the attenuation images in different energy ranges in a correction image area with homogeneous attenuation coefficients in order to determine the respective scattered radiation fraction. Toward that end, the inverse of the primary radiation function is considered and a search conducted for that scatter-to-primary ratio which leads to consistent mass per unit areas for the attenuation images recorded in different energy ranges.
摘要翻译：对于双重X射线吸收测量中的散射辐射校正，建议在具有均匀衰减系数的校正图像区域中使用由不同能量范围内的衰减图像提供的附加信息，以确定相应的散射辐射分数。为此，考虑了初级辐射函数的倒数，并且对于该分散原理比进行了搜索，这导致在不同能量范围内记录的衰减图像的每单位面积的质量一致。

2. 发明申请

US20060182322A1 Generalized measure of image quality in medical X-ray imaging 失效
标题翻译：医学X光成像中图像质量的广义测量
公开(公告)号：US20060182322A1
公开(公告)日：2006-08-17
申请号：US11058025
申请日：2005-02-15
申请人： Philipp Bernhardt , Lothar Batz , Ernst-Peter Ruhrnschopf , Martin Hoheisel
发明人： Philipp Bernhardt , Lothar Batz , Ernst-Peter Ruhrnschopf , Martin Hoheisel
IPC分类号： G06K9/00
CPC分类号： G06T7/0002 , A61B5/02007 , A61B5/7257 , A61B6/12 , A61B6/4291
摘要： A method for defining image quality characteristics of X-ray based medical projection imaging devices is provided. A spatial frequency-dependent signal-to-noise ratio function includes image quality parameters of spatial resolution, object contrast and noise. The detectability of an object embedded into a defined background, such as a cardiac guide wire in a patient is determined. An X-ray system may be defined and set up for obtaining an optimized image quality to determine the best object detectability for a given patient dose.
摘要翻译：提供了一种用于定义基于X射线的医疗投影成像装置的图像质量特性的方法。空间频率相关信噪比函数包括空间分辨率，对象对比度和噪声的图像质量参数。确定嵌入到定义的背景中的对象的可检测性，例如患者中的心导丝。可以定义和设置X射线系统以获得优化的图像质量，以确定给定患者剂量的最佳对象检测能力。

3. 发明申请

US20100027867A1 Method for creating mass density images on the basis of attenuation images captured at different energy levels 有权
标题翻译：基于在不同能级捕获的衰减图像创建质量密度图像的方法
公开(公告)号：US20100027867A1
公开(公告)日：2010-02-04
申请号：US12148791
申请日：2008-04-22
申请人： Philipp Bernhardt , Ernst-Peter Ruhrnschopf
发明人： Philipp Bernhardt , Ernst-Peter Ruhrnschopf
IPC分类号： G06K9/00 , G01N23/04
CPC分类号： A61B6/00 , A61B6/4035 , A61B6/482 , A61B6/583
摘要： The invention relates to a method for creating scatter-corrected mass density image in dual energy X-ray absorptiometry. The mass density image is created using additional information provided by attenuation images at different energy levels in an inhomogeneous correction image area. A multi-dimensional mass density is found that is consistent for a plurality of the attenuation images by inverting a primary radiation function. A scatter fraction is determined on the basis of the multi-dimensional mass density.
摘要翻译：本发明涉及一种用于在双能X射线吸收测定法中产生散射校正质量密度图像的方法。使用由不均匀校正图像区域中的不同能量级别的衰减图像提供的附加信息来创建质量密度图像。发现通过反转主辐射函数对多个衰减图像是一致的多维质量密度。基于多维质量密度确定散射分数。

4. 发明申请

US20080095302A1 Method for hardening correction in medical imaging 有权
标题翻译：医学影像硬化矫正的方法
公开(公告)号：US20080095302A1
公开(公告)日：2008-04-24
申请号：US11973471
申请日：2007-10-09
申请人： Ernst-Peter Ruhrnschopf , Bernhard Scholz
发明人： Ernst-Peter Ruhrnschopf , Bernhard Scholz
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： G01N23/04 , A61B6/583 , G06T11/005
摘要： The invention relates to a method for beam hardening correction in medical image. Beam hardening within the context of medical imaging projection image profiles are split up into a basic profile which is assigned to a homogeneous object area and into a detailed profile which is assigned to an inhomogeneous object area. On the basis of the basic profile and of the difference profile the mass occupancy of the different components in the object to be examined can be approximately determined. On the basis of the approximately determined mass occupancy the correction of the beam hardening can then be performed directly on the projection data.
摘要翻译：本发明涉及医用图像中的束硬化校正方法。在医学成像投影图像轮廓的上下文中的光束硬化被分割成基本轮廓，其被分配给均匀的对象区域和分配给不均匀对象区域的详细轮廓。基于基本轮廓和差异轮廓，可以近似地确定待检查对象中的不同部件的质量占有率。基于大致确定的质量占有率，可以直接对投影数据执行光束硬化的校正。

5. 发明申请

US20080089468A1 Method for reconstructing a three-dimensional image volume and x-ray devices 有权
标题翻译：重建三维图像体积和x射线装置的方法
公开(公告)号：US20080089468A1
公开(公告)日：2008-04-17
申请号：US11897348
申请日：2007-08-30
申请人： Benno Heigl , Stefan Hoppe , Joachim Hornegger , Ernst-Peter Ruhrnschopf , Holger Scherl , Bernhard Scholz , Michael Zellerhoff
发明人： Benno Heigl , Stefan Hoppe , Joachim Hornegger , Ernst-Peter Ruhrnschopf , Holger Scherl , Bernhard Scholz , Michael Zellerhoff
IPC分类号： A61B6/03
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4458 , G01N2223/419 , G01N2223/612
摘要： To enable an artifact free reconstruction even in the case of large regions of interest and with scanning paths of below 360°, provision is made for a method, with which a three-dimensional image volume is reconstructed from a number of two-dimensional projection images of a region of interest, which were recorded about the region of interest during a rotation of a recording system, comprising an x-ray source with a focal point and a detector, by calculating the gray scale values of the voxels of the image volume by back projection of the projection images, with which each two-dimensional projection images is composed in each instance from at least two individual projection images to form an extended two-dimensional projection image, with the respectively at least two individual projection images being recorded with a constant relative position between the focal point and the region of interest.
摘要翻译：为了即使在感兴趣的大区域和360度以下的扫描路径的情况下也能够实现无伪影重建，提供一种方法，利用该方法从多个二维投影图像重建三维图像体积通过计算图像体积的体素的灰度值，通过计算图像体积的体素的灰度值，记录关于记录系统旋转期间的感兴趣区域的感兴趣区域，其包括具有焦点和检测器的x射线源投影图像的背投影，每个二维投影图像在每个实例中由至少两个单独的投影图像组成，以形成扩展的二维投影图像，分别具有至少两个单独的投影图像被记录有焦点和感兴趣区域之间的常数相对位置。

6. 发明授权

US4065397A Planigraphic X-ray apparatus for the preparation of tomographic images 失效
标题翻译：用于准备断层图像的平面X射线装置
公开(公告)号：US4065397A
公开(公告)日：1977-12-27
申请号：US751204
申请日：1976-12-16
申请人： Ernst-Peter Ruhrnschopf , Gerhard Linke
发明人： Ernst-Peter Ruhrnschopf , Gerhard Linke
IPC分类号： A61B6/03 , G01N23/08 , G03B41/16
CPC分类号： G01N23/083 , A61B6/4071
摘要： A planigraphic X-ray apparatus for the preparation of transverse tomographic or planigraphic images of an exposure object, which consists of an X-ray measuring arrangement including an X-ray source generating a polyenergetic X-ray beam penetrating through the exposure object, with a radiation receiver which determines the radiation intensity of the X-radiation as a reference value prior to its ingress into the object, and a further radiation receiver which determines the radiation intensity behind the object in the direction of the radiation as attenuated values, through scanning of the projected X-ray beam at sequential equidistant points, a comparator element which forms a measured magnitude from the two values, as well as a drive arrangement for the measuring arrangement, consisting of a pivot mounting for producing rotational movements of the X-ray measuring arrangement through small equidistant angular amounts about a rotational axis generally coincident with the symmetrical longitudinal axis of the exposure object in an alternating sequence with each respective scan and, a measured value converter for the transformation of the measured values into a tomographic image wherein a function stage applies a proximation function to the results obtained with polyenergetic X-ray energy so as to convert the results to values suitable for processing based on the assumption of monoenergetic radiation.
摘要翻译：一种用于制备曝光对象的横断层图像或平面图像的平面X射线装置，其包括X射线测量装置，该X射线测量装置包括产生穿透曝光对象的多能X射线束的X射线源，辐射接收器，其将X射线的辐射强度确定为其入射到物体之前的参考值;以及另外的辐射接收器，其通过扫描扫描来确定辐射方向上的物体在辐射方向上的辐射强度作为衰减值在连续等距点处的投影X射线束，从两个值形成测量的量值的比较器元件以及用于测量装置的驱动装置，包括用于产生X射线测量的旋转运动的枢轴安装通过大体上与对称隆起重合的旋转轴线的小的等距角度的排列曝光对象的尾部轴线与每个相应扫描交替的顺序，以及用于将测量值变换成断层图像的测量值转换器，其中功能阶段对由多能X射线能量获得的结果应用近似函数，将结果转换为适合于基于单能辐射假设的处理值。

7. 发明申请

US20070230652A1 Method for correcting truncation artifacts 有权
标题翻译：截断伪影的校正方法
公开(公告)号：US20070230652A1
公开(公告)日：2007-10-04
申请号：US11729526
申请日：2007-03-29
申请人： Bernhard Scholz , Ernst-Peter Ruhrnschopf
发明人： Bernhard Scholz , Ernst-Peter Ruhrnschopf
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G01N23/046 , A61B6/583 , G01N2223/419
摘要： A method is claimed for correcting truncation artifacts in a tomography method, wherein internal checkpoints having a low level of attenuation are selected within the projection image and external checkpoints are defined by extrapolation based on the internal checkpoints. An adaptation function is then tailored to the internal checkpoints and the external checkpoints. This allows truncation artifacts to be effectively suppressed during the reconstruction of sectional images.
摘要翻译：要求一种用于在断层摄影方法中校正截断伪像的方法，其中在投影图像内选择具有低水平衰减的内部检查点，并且外部检查点通过基于内部检查点的外推来定义。然后，将适应功能定制到内部检查点和外部检查点。这允许在重建截面图像期间有效地抑制截断伪像。

8. 发明申请

US20090135993A1 Computed tomography method 有权
标题翻译：计算机断层扫描法
公开(公告)号：US20090135993A1
公开(公告)日：2009-05-28
申请号：US12313638
申请日：2008-11-21
申请人： Wolfgang Harer , Alois Nottling , Ernst-Peter Ruhrnschopf
发明人： Wolfgang Harer , Alois Nottling , Ernst-Peter Ruhrnschopf
IPC分类号： H05G1/60
CPC分类号： A61B6/032 , A61B6/4291 , A61B6/5282 , A61B6/585 , A61B6/589
摘要： The invention relates to a computed tomography method. The airgap associated with a projection direction is determined by determining, in the projection images, edge pixels which map object edges on a detector. By back-projecting the edge pixels in an object image space it is possible to determine an envelope polygon for an outline contour of the examination object. The width of the airgap associated with a specific projection direction can then be determined on the basis of the envelope polygon. Exact knowledge of the current airgap serves to improve the scattered radiation correction.
摘要翻译：本发明涉及一种计算机断层摄影方法。通过在投影图像中确定在检测器上映射物体边缘的边缘像素来确定与投影方向相关联的气隙。通过将边缘像素反投影在对象图像空间中，可以确定检查对象的轮廓轮廓的包络多边形。然后可以基于包络多边形来确定与特定投影方向相关联的气隙的宽度。对当前气隙的准确了解有助于改善散射辐射校正。

9. 发明申请

US20080159469A1 Method for combined bone hardening and scattered radiation correction in X-ray computed tomography 有权
标题翻译： X线计算机断层扫描中组合骨硬化和散射辐射矫正的方法
公开(公告)号：US20080159469A1
公开(公告)日：2008-07-03
申请号：US11903800
申请日：2007-09-25
申请人： Ernst-Peter Ruhrnschopf , Bernhard Scholz
发明人： Ernst-Peter Ruhrnschopf , Bernhard Scholz
IPC分类号： G01N23/00 , G06K9/00
CPC分类号： A61B6/505 , A61B6/032 , A61B6/4291
摘要： The invention relates to a method for combined bone hardening and scattered radiation correction in X-ray computed tomography of a heterogeneous object with a CT system comprising an X-ray source moved around an object, a flat detector with a large number of distributed detector elements which detect measuring beams from a focal point of the X-ray tube, and a control and arithmetic-logic unit—by iterative reconstruction and segmented vectorial reprojection calculation, wherein a scattered radiation correction and a radiation hardening correction are carried out in each iteration cycle for at least two different material components of the object being examined. The invention also relates to an X-ray CT system for carrying out this method.
摘要翻译：本发明涉及一种用于具有CT系统的X射线计算机断层摄影中的组合骨硬化和散射辐射校正的方法，所述CT系统包括围绕物体移动的X射线源，具有大量分布式检测器元件的平面检测器其检测来自X射线管的焦点的测量光束，以及控制和算术逻辑单元 - 通过迭代重建和分段矢量重新投影计算，其中在每个迭代循环中执行散射辐射校正和辐射硬化校正对于被检查物体的至少两种不同的材料成分。本发明还涉及一种用于执行该方法的X射线CT系统。

10. 发明申请

US20060008046A1 Device and method for x-ray scatter correction in computer tomography 有权
标题翻译：计算机断层扫描中X射线散射校正的装置和方法
公开(公告)号：US20060008046A1
公开(公告)日：2006-01-12
申请号：US11154727
申请日：2005-06-16
申请人： Ernst-Peter Ruhrnschopf
发明人： Ernst-Peter Ruhrnschopf
IPC分类号： A61B6/00 , G01N23/00
CPC分类号： G06T11/005 , A61B6/032 , A61B6/4291 , A61B6/5282 , G01N23/046 , G01N2223/419
摘要： A device (1) for computer tomography, which is set up for x-ray scatter correction, features an evaluation unit (17) which evaluates values stored as a table in a data memory for x-ray scatter correction, which have been determined in advance with the aid of a Monte Carlo simulation which take account of interactions of the photons with the object (2) to be investigated.
摘要翻译：用于计算机断层摄影的用于X射线散射校正的装置（1）具有评估单元（17），其评估在用于X射线散射校正的数据存储器中作为表存储的值，其已经在借助蒙特卡罗模拟，考虑到光子与被调查物体（2）的相互作用。

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