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11.发明申请公开(公告)号：US20110293159A1
公开(公告)日：2011-12-01
申请号：US13111244
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been captured during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first image data is computed by the measurement data being modified to obtain a specific gray value characteristic of the first image data to be reconstructed and the first image data is computed by way of an iterative algorithm using the modified measurement data. Second image data is also computed by a series of chronologically-consecutive images being reconstructed and processing being carried out on the series of images to reduce temporal noise. Finally a combination of the first and the second image data is carried out.
摘要翻译： 公开了一种用于从测量数据重建被检查对象的图像数据的方法，其中测量数据已经在计算机断层摄影系统的辐射源与被检查物体之间的相对旋转运动期间被捕获。 在至少一个实施例中，通过修改的测量数据来计算第一图像数据，以获得要重建的第一图像数据的特定灰度特性，并且通过使用修改的测量数据的迭代算法来计算第一图像数据 。 还通过一系列按时间顺序重新连续的图像来计算第二图像数据，并且对该系列图像执行处理以减少时间噪声。 最后，执行第一和第二图像数据的组合。
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12.发明申请Method for scattered radiation correction in an X-ray computed tomography system, and method for generating a tomographic display corrected for scattered radiation, and/or an X-ray computed tomography system 审中-公开在X射线计算机断层摄影系统中的散射辐射校正方法以及用于产生针对散射辐射校正的断层显像的方法和/或X射线计算机断层摄影系统公开(公告)号：US20080292170A1
公开(公告)日：2008-11-27
申请号：US12153120
申请日：2008-05-14
IPC分类号： G06K9/00
CPC分类号： A61B6/4014 , A61B6/032
摘要： A method is disclosed for scattered radiation correction in an X-ray computed tomography system having at least two tube-detector systems. It is provided, according to at least one embodiment, to make use of a data record that includes data projections required for the reconstruction and a prescribed number of first scattered radiation projections. Respective scattered radiation components for the scattered radiation correction of all data projections are determined on the basis of the first scattered radiation projections and second scattered radiation projections determined therefrom.
摘要翻译： 公开了一种在具有至少两个管检测器系统的X射线计算机断层摄影系统中用于散射辐射校正的方法。 根据至少一个实施例，提供使用包括重建所需的数据投影和规定数量的第一散射辐射投影的数据记录。 基于从其确定的第一散射辐射投影和第二散射辐射投影来确定用于所有数据投影的散射辐射校正的散射辐射分量。
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公开(公告)号：US20100189213A1
公开(公告)日：2010-07-29
申请号：US12753960
申请日：2010-04-05
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4085 , A61B6/4241 , A61B6/482 , A61B6/5282 , G01N2223/206 , G01N2223/419
摘要： A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.
摘要翻译： 公开了一种多发射体计算机断层摄影扫描器，包括以彼此成角度偏移地设置的多个x射线发射器/检测器布置对。 在至少一个实施例中，对的检测器布置被设计为能量选择性的。
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公开(公告)号：US07440536B2
公开(公告)日：2008-10-21
申请号：US11543836
申请日：2006-10-06
IPC分类号： G01N23/00
CPC分类号： G03B42/02 , A61B6/032 , A61B6/4014 , A61B6/5282 , A61B6/583
摘要： A method for scattered radiation correction of a CT system, including at least two focus/detector systems operated angularly offset from one another, is disclosed. In the method, at at least one phantom, similar to the examined object at least in a subregion, for at least one of the focus/detector systems, the scattered radiation intensity occurring is determined in the detector of a focus/detector system during the operation of the at least one focus of at least one other focus/detector system. Further, the spatial distribution thereof is stored for a number of angles of rotation of the focus/detector systems. During scanning of the object, the scattered radiation intensities, determined with the aid of a similar phantom that originate from the at least one other focus/detector system, are subtracted from the measured intensities of the first focus/detector system while taking account of the spatial orientation of the focus/detector systems and the beam respectively considered. Finally, absorption values are calculated with the aid of the intensity values thus corrected, and CT pictures or CT volume data are thereby reconstructed.
摘要翻译： 公开了一种用于CT系统的散射辐射校正的方法，其包括彼此角度偏移地操作的至少两个焦点/检测器系统。 在该方法中，至少在至少一个子区域中的被检查对象的至少一个体模，对于焦点/检测器系统中的至少一个，在焦点/检测器系统的检测器期间确定发生的散射辐射强度 操作至少一个其它焦点/检测器系统的至少一个焦点。 此外，其空间分布被存储为聚焦/检测器系统的多个旋转角度。 在扫描对象期间，借助于来自至少一个其它焦点/检测器系统的类似幻影确定的散射辐射强度从所测量的第一焦点/检测器系统的强度中减去，同时考虑到 分别考虑了焦点/探测器系统和光束的空间取向。 最后，借助于如此校正的强度值来计算吸收值，由此重建CT图像或CT体积数据。
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公开(公告)号：US08081732B2
公开(公告)日：2011-12-20
申请号：US12753960
申请日：2010-04-05
IPC分类号： G01N23/00
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4085 , A61B6/4241 , A61B6/482 , A61B6/5282 , G01N2223/206 , G01N2223/419
摘要： A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.
摘要翻译： 公开了一种多发射体计算机断层摄影扫描器，包括以彼此成角度偏移地设置的多个x射线发射器/检测器布置对。 在至少一个实施例中，对的检测器布置被设计为能量选择性的。
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公开(公告)号：US20090129540A1
公开(公告)日：2009-05-21
申请号：US12289566
申请日：2008-10-30
IPC分类号： H05G1/60
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4085 , A61B6/4241 , A61B6/482 , A61B6/5282 , G01N2223/206 , G01N2223/419
摘要： A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.
摘要翻译： 公开了一种多发射体计算机断层摄影扫描器，包括以彼此成角度偏移地设置的多个x射线发射器/检测器布置对。 在至少一个实施例中，对的检测器布置被设计为能量选择性的。
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公开(公告)号：US20070086561A1
公开(公告)日：2007-04-19
申请号：US11543836
申请日：2006-10-06
CPC分类号： G03B42/02 , A61B6/032 , A61B6/4014 , A61B6/5282 , A61B6/583
摘要： A method for scattered radiation correction of a CT system, including at least two focus/detector systems operated angularly offset from one another, is disclosed. In the method, at at least one phantom, similar to the examined object at least in a subregion, for at least one of the focus/detector systems, the scattered radiation intensity occurring is determined in the detector of a focus/detector system during the operation of the at least one focus of at least one other focus/detector system. Further, the spatial distribution thereof is stored for a number of angles of rotation of the focus/detector systems. During scanning of the object, the scattered radiation intensities, determined with the aid of a similar phantom that originate from the at least one other focus/detector system, are subtracted from the measured intensities of the first focus/detector system while taking account of the spatial orientation of the focus/detector systems and the beam respectively considered. Finally, absorption values are calculated with the aid of the intensity values thus corrected, and CT pictures or CT volume data are thereby reconstructed.
摘要翻译： 公开了一种用于CT系统的散射辐射校正的方法，其包括彼此角度偏移地操作的至少两个焦点/检测器系统。 在该方法中，至少在至少一个子区域中的被检查对象的至少一个体模，对于焦点/检测器系统中的至少一个，在焦点/检测器系统的检测器期间确定发生的散射辐射强度 操作至少一个其它焦点/检测器系统的至少一个焦点。 此外，其空间分布被存储为聚焦/检测器系统的多个旋转角度。 在扫描对象期间，借助于来自至少一个其它焦点/检测器系统的类似幻影确定的散射辐射强度从所测量的第一焦点/检测器系统的强度中减去，同时考虑到 分别考虑了焦点/探测器系统和光束的空间取向。 最后，借助于如此校正的强度值来计算吸收值，由此重建CT图像或CT体积数据。
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18.发明申请公开(公告)号：US20100195787A1
公开(公告)日：2010-08-05
申请号：US12695256
申请日：2010-01-28
申请人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
发明人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
摘要： A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at different X-ray energy spectra. In at least one embodiment of the process, CT images are firstly reconstructed in each case from a semi-rotation with the two recording systems, with irradiated lengths of the contrast agent-enriched structures and the soft tissue being calculated therefrom. Subsequently, a common X-ray energy is assumed and artificial measurement data records are calculated therefor, using the knowledge of the irradiated lengths for both recording systems at the same common X-ray energy. The artificial measurement data of respectively a quarter-rotation per recording system is then used to calculate the final CT image with a high time resolution. The method affords the use of dual-energy scans without losing the high time resolution available in dual-source systems.
摘要翻译： 公开了一种用于使用计算机断层摄影扫描仪生成具有高时间分辨率的CT图像的方法和装置，该计算机断层摄影扫描仪具有在不同X射线能谱下操作的至少两个记录系统。 在该过程的至少一个实施例中，首先在两个记录系统的半旋转中重建CT图像，其中计算富含造影剂的结构和软组织的照射长度。 随后，假设使用常见的X射线能量，并且使用相同共同的X射线能量对两个记录系统的照射长度的知识来计算人造测量数据记录。 然后使用每个记录系统的四分之一旋转的人造测量数据来计算具有高时间分辨率的最终CT图像。 该方法提供双能量扫描的使用，而不会损失双源系统中可用的高时间分辨率。
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19.发明授权公开(公告)号：US07924970B2
公开(公告)日：2011-04-12
申请号：US12695256
申请日：2010-01-28
申请人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
发明人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
IPC分类号： A61B6/00
摘要： A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at different X-ray energy spectra. In at least one embodiment of the process, CT images are firstly reconstructed in each case from a semi-rotation with the two recording systems, with irradiated lengths of the contrast agent-enriched structures and the soft tissue being calculated therefrom. Subsequently, a common X-ray energy is assumed and artificial measurement data records are calculated therefor, using the knowledge of the irradiated lengths for both recording systems at the same common X-ray energy. The artificial measurement data of respectively a quarter-rotation per recording system is then used to calculate the final CT image with a high time resolution. The method affords the use of dual-energy scans without losing the high time resolution available in dual-source systems.
摘要翻译： 公开了一种用于使用计算机断层摄影扫描仪生成具有高时间分辨率的CT图像的方法和装置，该计算机断层摄影扫描仪具有在不同X射线能谱下操作的至少两个记录系统。 在该过程的至少一个实施例中，首先在两个记录系统的半旋转中重建CT图像，其中计算富含造影剂的结构和软组织的照射长度。 随后，假设使用常见的X射线能量，并且使用相同共同的X射线能量对两个记录系统的照射长度的知识来计算人造测量数据记录。 然后使用每个记录系统的四分之一旋转的人造测量数据来计算具有高时间分辨率的最终CT图像。 该方法提供双能量扫描的使用，而不会损失双源系统中可用的高时间分辨率。
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20.发明授权公开(公告)号：US07277524B2
公开(公告)日：2007-10-02
申请号：US11169913
申请日：2005-06-30
申请人： Herbert Bruder , Thomas Flohr , Ernst Klotz , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Ernst Klotz , Karl Stierstorfer
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B5/1075 , A61B6/027 , A61B6/4085 , A61B6/461 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： A method is disclosed for a multislice computer assisted tomograph, capable of carrying out a spiral scan of an object volume with a pitch p selected to be small enough that each slice of the object volume is multiply detected during the spiral scan. The method includes calculating, using measured data of two temporally consecutive at least one of revolutions and half revolutions, an image of the object volume from which a change inside the object volume between the two temporally consecutive at least one of revolutions and half revolutions is directly visible. An embodiment of the method can permit, for example, the detection and visualization of dynamic processes with an enhanced time resolution.
摘要翻译： 公开了一种用于多层计算机辅助断层摄影机的方法，其能够对所选择的节距p的物体体积进行螺旋扫描，所述间距p被选择为足够小，使得在螺旋扫描期间对对象体积的每个切片进行乘法检测。 该方法包括使用两个时间上连续的至少一个旋转和半圈的测量数据来计算在两个时间上连续的至少一个转和半转之间的对象体积内的变化直接在其中的对象体积的图像 可见。 该方法的实施例可以允许例如具有增强的时间分辨率的动态过程的检测和可视化。
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