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公开(公告)号：US08693636B2
公开(公告)日：2014-04-08
申请号：US13293379
申请日：2011-11-10
申请人： Ute Feuerlein , Sebastian Gehrsitz , Christiane Koch , Gerd Mayer , Stefan Muehleck , Rainer Raupach
发明人： Ute Feuerlein , Sebastian Gehrsitz , Christiane Koch , Gerd Mayer , Stefan Muehleck , Rainer Raupach
IPC分类号： H05G1/32
摘要： In a method and x-ray device to determine the value of an x-ray tube voltage to generate at least one image of defined tissue to be examined, at least one provided parameter is used that establishes or describes the desired image quality; based on the dependency of the contrast of the defined tissue to be examined on the spectrum of the x-ray radiation or on the value of the tube voltage of the x-ray tube. The tube voltage is determined also based on a contrast-to-noise ratio that is constantly maintained under consideration of the aforementioned parameter such that the dose of x-ray radiation applied to the patient is optimally low upon setting the value of the tube voltage at the x-ray tube and the acquisition of at least one x-ray projection of the defined tissue.
摘要翻译： 在用于确定x射线管电压的值以产生待检查的限定组织的至少一个图像的方法和x射线装置中，使用至少一个提供的参数来建立或描述所需的图像质量; 基于要检查的所确定组织的对比度对X射线辐射的光谱或X射线管的管电压的值的依赖性。 管电压还基于在考虑上述参数下不断保持的对比噪声比来确定，使得施加到患者的x射线辐射的剂量在将管电压的值设置在 X射线管和获取所定义组织的至少一个X射线投影。
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公开(公告)号：US08687763B2
公开(公告)日：2014-04-01
申请号：US13293366
申请日：2011-11-10
IPC分类号： H05G1/30
摘要： The value of a tube voltage of an x-ray tube, used to acquire x-ray projections of a patient in order to generate at least one image in each phase of a multiphase examination, is determined from a contrast-to-noise ratio that establishes the desired image quality of the image in each phase, and the tube current for each tube voltage for each phase is determined given a constantly maintained contrast-to-noise ratio for different tube voltages. For each phase, a value for the dose of x-ray radiation is defined for each different tube voltage and the associated determined tube current. From among the different tube voltages, a tube voltage is set that causes the total dose of x-ray radiation applied to the patient to be as low as possible for all phases of the examination.
摘要翻译： 用于获取患者的x射线投影以便在多相检查的每个阶段中产生至少一个图像的X射线管的管电压的值由对比度 - 在各相中建立图像的期望图像质量，并且针对不同的管电压确定针对每个相的每个管电压的管电流，给定恒定的对比噪声比。 对于每个相，针对每个不同的管电压和相关的确定的管电流来定义X射线辐射剂量的值。 从不同的管电压中，设置管电压，其使得施加到患者的X射线辐射的总剂量尽可能低于检查的所有阶段。
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公开(公告)号：US20120201344A1
公开(公告)日：2012-08-09
申请号：US13360964
申请日：2012-01-30
申请人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
发明人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/405 , A61B6/481 , A61B6/5258 , A61B6/545 , A61B6/583 , G06T5/009 , H05G1/32
摘要： In a method and x-ray device to adapt the width and the position of a central value of a greyscale windowing for imaging with the x-ray device based on CT values determined with said x-ray device, the adaptation takes place within the scope of a determination and adjustment of an acquisition tube voltage of an x-ray tube of the x-ray device for an examination of a defined tissue of a patient, assuming a reference tube voltage for the examination of the defined tissue of the patient, and in which a width and position of a central value of the greyscale windowing that are associated with the reference tube voltage are automatically adapted to the acquisition tube voltage.
摘要翻译： 在一种方法和x射线装置中，根据由所述X射线装置确定的CT值，使用X射线装置进行成像的灰度窗口的中心值的宽度和位置，以适应范围 确定和调整x射线装置的X射线管的采集管电压，用于检查患者的确定的组织，假设用于检查患者的确定的组织的参考管电压，以及 其中与参考管电压相关联的灰度窗口的中心值的宽度和位置自动适应于采集管电压。
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公开(公告)号：US08218721B2
公开(公告)日：2012-07-10
申请号：US12570197
申请日：2009-09-30
申请人： Rainer Raupach , Bernhard Schmidt
发明人： Rainer Raupach , Bernhard Schmidt
CPC分类号： G21K1/10 , A61B6/032 , A61B6/06 , A61B6/4035 , G21K1/02
摘要： A diaphragm and diaphragm device for the specific manipulation of x-ray radiation that emanates from an x-ray focus of a CT apparatus and serves for scanning an examination subject, wherein the x-ray focus and the diaphragm arranged relatively near to the focus can be rotated together around a system axis (z-axis), and the diaphragm has movable diaphragm elements that dynamically adjust a diaphragm aperture (and therefore the spatial divergence of the x-rays passing through the diaphragm aperture). The diaphragm elements have a transmission factor for x-ray radiation that is different than zero. With such a diaphragm or diaphragm device the acquisition of the projection data necessary for the reconstruction of an artifact-free image of a region of interest (ROI) is possible with lower radiation exposure of the examination subject.
摘要翻译： 一种隔膜和隔膜装置，用于对CT装置的x射线焦点产生的x射线辐射的特定操作，用于扫描检查对象，其中x射线焦点和相对靠近焦点布置的光阑可以 围绕系统轴线（z轴）旋转在一起，并且隔膜具有可动的膜片元件，其可动态地调节光阑孔径（因此通过光阑孔径的x射线的空间发散）。 隔膜元件具有不同于零的x射线辐射的透射系数。 使用这种隔膜或隔膜装置，可以在检查对象的较低的辐射照射下获取重建感兴趣区域（ROI）的无伪像图像所需的投影数据。
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公开(公告)号：US20120140893A1
公开(公告)日：2012-06-07
申请号：US13293366
申请日：2011-11-10
IPC分类号： H05G1/32
摘要： The value of a tube voltage of an x-ray tube, used to acquire x-ray projections of a patient in order to generate at least one image in each phase of a multiphase examination, is determined from a contrast-to-noise ratio that establishes the desired image quality of the image in each phase, and the tube current for each tube voltage for each phase is determined given a constantly maintained contrast-to-noise ratio for different tube voltages. For each phase, a value for the dose of x-ray radiation is defined for each different tube voltage and the associated determined tube current. From among the different tube voltages, a tube voltage is set that causes the total dose of x-ray radiation applied to the patient to be as low as possible for all phases of the examination.
摘要翻译： 用于获取患者的x射线投影以便在多相检查的每个阶段中产生至少一个图像的X射线管的管电压的值由对比度 - 在各相中建立图像的期望图像质量，并且针对不同的管电压确定针对每个相的每个管电压的管电流，给定恒定的对比噪声比。 对于每个相，针对每个不同的管电压和相关的确定的管电流来定义X射线辐射剂量的值。 从不同的管电压中，设置管电压，其使得施加到患者的X射线辐射的总剂量尽可能低于检查的所有阶段。
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106.发明申请公开(公告)号：US20110064292A1
公开(公告)日：2011-03-17
申请号：US12854341
申请日：2010-08-11
申请人： Yunqiang Chen , Tong Fang , Bernhard Schmidt , Rainer Raupach
发明人： Yunqiang Chen , Tong Fang , Bernhard Schmidt , Rainer Raupach
IPC分类号： G06T5/00
CPC分类号： G06T5/002 , G06T5/50 , G06T2207/10072 , G06T2207/20076 , G06T2207/20192 , G06T2207/30004 , G06T2207/30016
摘要： A method for enhancing a virtual non-contrast image, includes receiving a pair of dual scan CT images and calculating a virtual non-contrast image from the pair of CT images using known tissue attenuation coefficients. A conditional probability distribution is estimated for tissue at first and second points in each of the pair of CT images and the virtual non-contrast image as being the same type. A conditional probability distribution for tissue is estimated at the first and second points in each of the pair of CT images and the virtual non-contrast image as being of different types. An a posteriori probability of the tissue at the first and second points as being the same type is calculated from the conditional probability distributions, and an enhanced virtual non-contrast image is calculated using the a posteriori probability of the tissue at the first and second points as being the same type.
摘要翻译： 一种用于增强虚拟非对比度图像的方法，包括接收一对双扫描CT图像，并使用已知的组织衰减系数从所述一对CT图像计算虚拟非对比度图像。 对于一对CT图像和虚拟非对比度图像中的每一个中的第一和第二点处的组织估计为相同类型的条件概率分布。 在一对CT图像和虚拟非对比度图像中的每一个中的第一和第二点处估计组织的条件概率分布为不同类型。 根据条件概率分布计算第一和第二点处的组织作为相同类型的后验概率，并且使用在第一和第二点处的组织的后验概率来计算增强的虚拟非对比度图像 作为同一类型。
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公开(公告)号：US20100166277A1
公开(公告)日：2010-07-01
申请号：US12591871
申请日：2009-12-03
申请人： Rainer Raupach
发明人： Rainer Raupach
CPC分类号： A61B6/482 , A61B6/032 , G06T5/002 , G06T5/10 , G06T5/20 , G06T5/50 , G06T2207/10081 , G06T2207/20221 , G06T2207/30004
摘要： A method is disclosed for noise reduction of CT image data and an image processing system is disclosed. An object under examination is scanned and at least two CT image datasets are created, each being undertaken on the basis of a different x-ray generation process. Subsequently, the image datasets are split up into at least two split-up image datasets, with a lowest local frequency band and at least one high local frequency band. In at least one embodiment, this is followed by the determination of the noise in at least one of the image datasets for each x-ray spectrum and calculation of at least one new image dataset using an unchanged split-up image dataset in each case with the lowest frequency band and an image dataset created from a noise-minimized weighted combination of split-up image datasets, which originate from the scans with different x-ray energy spectrums.
摘要翻译： 公开了一种降低CT图像数据的方法，并且公开了一种图像处理系统。 扫描被检查物体，并创建至少两个CT图像数据集，每个CT图像数据集基于不同的x射线生成过程进行。 随后，将图像数据集分成至少两个具有最低本地频带和至少一个高本地频带的分割图像数据集。 在至少一个实施例中，随后确定每个X射线谱的至少一个图像数据集中的噪声，并且使用未改变的分割图像数据集计算至少一个新的图像数据集， 最低频带和由分割图像数据集的噪声最小化加权组合创建的图像数据集，其来自具有不同x射线能谱的扫描。
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108.发明授权Method and computed tomography system for producing tomograms of an object 失效用于产生物体的断层图像的方法和计算机断层摄影系统公开(公告)号：US07599464B2
公开(公告)日：2009-10-06
申请号：US11377671
申请日：2006-03-17
申请人： Rainer Raupach , Otto Sembritzki
发明人： Rainer Raupach , Otto Sembritzki
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/466 , G06T11/005 , Y10S378/901
摘要： A method and a computed tomography system are disclosed for producing computed tomograms of an object. A set of detector output data that represent beams over a specific angular range and a scan of a specific subregion of the object, are divided into m≧2 complete partial detector output data records that respectively cover the same complete angular range, but are reduced with their sampling density by 1/m and have mutually independent data records. Intermediate image data records (m records) that represent the identical object region are reconstructed from the m complete partial detector output data records. A correlation analysis is carried out between the m intermediate image data records. Finally, an image data record is produced that consists only of correlated data and includes no uncorrelated data.
摘要翻译： 公开了一种用于产生物体的计算机断层图的方法和计算机断层摄影系统。 一组检测器输出数据，表示特定角度范围内的波束和物体的特定子区域的扫描，分为m≥2个完全部分检测器输出数据记录，分别覆盖相同的完整角度范围，但是减少 采样密度为1 / m，具有相互独立的数据记录。 从m个完全部分检测器输出数据记录重构表示相同对象区域的中间图像数据记录（m记录）。 在m个中间图像数据记录之间进行相关分析。 最后，产生仅由相关数据组成的图像数据记录，并且不包括不相关的数据。
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109.发明授权Radiation diaphragm in device having two diaphragms, and method for scanning a subject therewith 有权具有两个隔膜的装置中的辐射隔膜，以及用于扫描被检体的方法公开(公告)号：US07403597B2
公开(公告)日：2008-07-22
申请号：US11409141
申请日：2006-04-21
申请人： Rainer Raupach
发明人： Rainer Raupach
摘要： in a diaphragm device for an x-ray apparatus for scanning a subject with a radiation beam and a scanning method using such a diaphragm device, the diaphragm device has at least two diaphragms. For at least one segment of the scan, the radiation beam that has been adjusted with the first diaphragm can be at least partially dynamically masked by the second diaphragm. High adjustment precisions for precise exposure of a measurement field of detector and high adjustment speed for masking of a radiation beam that is not needed for reconstruction of an image, or for reduction of a radiation exposure of the subject can be implemented to equal degree with the two diaphragms that are separate from one another.
摘要翻译： 在用于使用辐射束扫描对象的X射线装置的隔膜装置和使用这种隔膜装置的扫描方法中，隔膜装置具有至少两个隔膜。 对于扫描的至少一个部分，已经用第一隔膜调节的辐射束可以被第二隔膜至少部分地动态地屏蔽。 用于精确曝光检测器的测量场的高调整精度和用于掩蔽重建图像所不需要的辐射束或用于减少对象的辐射照射的高调节速度可以与 两个彼此分开的隔膜。
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110.发明申请公开(公告)号：US20070019780A1
公开(公告)日：2007-01-25
申请号：US11491104
申请日：2006-07-24
申请人： Gabriel Haras , Rainer Raupach
发明人： Gabriel Haras , Rainer Raupach
摘要： A method is disclosed for production of computer-tomographic scans via a CT system of a patient during an intervention with an instrument. An X-ray tube is moved on a rotation plane around the patient in order to produce a beam cone, and a detector with a plurality of detector elements measuring the radiation intensity after passing through the patient. Computer-tomographic scans are reconstructed from the measured values in a computation unit. The central direction of the beams of the scanning beam cone is set at an angle to the intervention axis, and at least one slice plane which differs from the rotation plane of the beam cone is displayed on a display.
摘要翻译： 公开了一种用于在用仪器进行干预期间通过患者的CT系统生产计算机断层扫描的方法。 X射线管在围绕患者的旋转平面上移动以产生束锥，以及具有多个检测器元件的检测器，其在通过患者之后测量辐射强度。 从计算单元中的测量值重建计算机断层扫描。 扫描光束锥体的光束的中心方向设置成与介入轴成一定角度，并且在显示器上显示与光束锥体的旋转平面不同的至少一个切片平面。
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