公开(公告)号：US07636415B2

公开(公告)日：2009-12-22

申请号：US12071108

申请日：2008-02-15

申请人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

发明人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

IPC分类号： G01N23/00

CPC分类号： A61B6/032 ,  A61B6/405 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5282

摘要： A method and an X-ray CT system are disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system.

摘要翻译： 公开了一种借助X射线CT系统产生断层图像的方法和X射线CT系统，X射线CT系统包括布置在具有角度偏移的台架上的至少两个X射线源以扫描检查对象。 在该方法的至少一个实施例中，为了确定散射辐射分布，进行预扫描，其中X射线源围绕检查对象旋转，并且剂量率作为旋转角度的函数被调制， 在大部分转速下不产生辐射剂量，在特定的预扫描角度下，通过焦点/检测器系统的X射线源短暂地和单独地产生剂量率，同时测量接收的散射辐射 通过至少一个其它焦点/检测器系统的检测器。

公开(公告)号：US20080198965A1

公开(公告)日：2008-08-21

申请号：US12071108

申请日：2008-02-15

申请人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

发明人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

IPC分类号： H05G1/60

CPC分类号： A61B6/032 ,  A61B6/405 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5282

摘要： A method is disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system. Moreover, at least one embodiment of the invention also relates to an X-ray CT system having at least two focus/detector systems and an arithmetic and control unit with a memory for program code that carries out during operation the method steps being stored.

摘要翻译： 公开了一种借助于X射线CT系统来生产断层图像的方法，所述X射线CT系统包括布置在具有角度偏移的台架上的至少两个X射线源以扫描检查对象。 在该方法的至少一个实施例中，为了确定散射辐射分布，进行预扫描，其中X射线源围绕检查对象旋转，并且剂量率作为旋转角度的函数被调制， 在大部分转速下不产生辐射剂量，在特定的预扫描角度下，通过焦点/检测器系统的X射线源短暂地和单独地产生剂量率，同时测量接收的散射辐射 通过至少一个其它焦点/检测器系统的检测器。 此外，本发明的至少一个实施例还涉及具有至少两个焦点/检测器系统的X射线CT系统和具有用于程序代码的存储器的算术和控制单元，所述存储器在操作期间在存储方法步骤期间执行。

公开(公告)号：US06744846B2

公开(公告)日：2004-06-01

申请号：US10255356

申请日：2002-09-26

申请人： Stefan Popescu ,  Christoph Suess ,  Heiko Wolf ,  Dietmar Hentschel

发明人： Stefan Popescu ,  Christoph Suess ,  Heiko Wolf ,  Dietmar Hentschel

IPC分类号： A61B600

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/542 ,  A61B6/544 ,  H05G1/34

摘要： In a computed tomography apparatus and a method for automatic exposure control in computed tomography scanning, an exposure controller, during a first half of a revolution of an X-ray focus around a subject, calculates an actual attenuation profile of a slice of the subject from electrical signals generated by the radiation detector in the first half of the revolution, and calculates an extrapolated attenuation profile of the slice for a second half of the revolution from the actual attenuation profile, and adjusts an operating parameter of the X-ray source, such as the tube current, to modify the radiation dose emitted by the X-ray source during the second half of the revolution dependent on the extrapolated attenuation profile.

摘要翻译： 在计算机断层摄影装置和计算机断层摄影扫描中的自动曝光控制的方法中，曝光控制器在被摄体周围的X射线焦点的旋转的前半部分期间计算被摄体的切片的实际衰减曲线 在旋转的前半部分由辐射检测器产生的电信号，并且根据实际衰减曲线计算出旋转的后半部分的切片的外推衰减曲线，并且调整X射线源的操作参数， 作为管电流，根据外推的衰减分布来修改在旋转的后半段期间由X射线源发射的辐射剂量。

公开(公告)号：US5604778A

公开(公告)日：1997-02-18

申请号：US541175

申请日：1995-10-11

申请人： Arkadiusz Polacin ,  Christoph Suess

发明人： Arkadiusz Polacin ,  Christoph Suess

IPC分类号： A61B6/03 ,  G01N23/04

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4014 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： A spiral scan computed tomography apparatus has multiple x-ray sources with their respective foci symmetrically arranged on a circle concentric with a measurement field around which the x-ray sources are rotated in order to spirally scan an examination subject while a relative motion between the x-ray sources and a patient support is produced along a longitudinal direction of the patient support. X-rays attenuated by the examination subject are detected by a stationary detector ring, or by a number of detector arrays which co-rotate with the x-ray sources on the gantry. The scan time can thereby be decreased in comparison to known systems or, within the same scan time a higher x-ray power can be achieved.

摘要翻译： 螺旋扫描计算机断层摄影装置具有多个X射线源，其各自的焦点对称地布置在与测量场同心的圆上，X射线源周围旋转X射线源以螺旋扫描检查对象，同时X轴之间的相对运动 沿着患者支架的纵向方向产生射线源和患者支架。 由检查对象衰减的X射线由固定检测器环或通过与台架上的x射线源共同旋转的多个检测器阵列来检测。 因此与已知的系统相比，扫描时间可以减少，或者在相同的扫描时间内可以实现更高的x射线功率。

公开(公告)号：US06490336B1

公开(公告)日：2002-12-03

申请号：US09831543

申请日：2001-07-23

申请人： Christoph Suess ,  Willi Kalender

发明人： Christoph Suess ,  Willi Kalender

IPC分类号： A61B600

CPC分类号： A61B6/583 ,  A61B6/032

摘要： A phantom for measuring slice thicknesses, slice sensitivity profiles and the axial modulation transfer function in an X-ray computed tomography apparatus contains a foil of a material that highly attenuates X-radiation that is arranged parallel to the image plane of the X-ray computed tomography apparatus given employment of the phantom and which had an axial expanse that is small compared to the thinnest slice to be measured. The expanse of the foil in the direction of the image plane is on the order of magnitude of a few millimeters.

摘要翻译： 用于测量X射线计算机断层摄影装置中的切片厚度，切片灵敏度分布和轴向调制传递函数的体模包含高度衰减X射线的材料箔，其平行于X射线计算机的图像平面 给出使用体模的断层摄影装置，其与具有待测量的最薄切片相比具有小的轴向宽度。 在图像平面方向上的箔片的宽度在数毫米数量级上。

公开(公告)号：US4651335A

公开(公告)日：1987-03-17

申请号：US698852

申请日：1985-02-06

申请人： Willi Kalender ,  Guenter Schmitt ,  Christoph Suess

发明人： Willi Kalender ,  Guenter Schmitt ,  Christoph Suess

IPC分类号： A61B5/055 ,  A61B6/03 ,  A61B6/04 ,  A61G13/12 ,  G01N23/04 ,  G01N23/00

CPC分类号： A61B6/032 ,  A61B5/055 ,  A61B6/4035 ,  A61G13/12 ,  G01N23/046 ,  A61G13/121 ,  A61G13/1235 ,  A61G13/1245 ,  G01N2223/419 ,  G01N2223/612

摘要： Patient support elements, such as pillows, are disposed on opposite sides of an examination subject lying on a supporting bed in a tomographic apparatus. The patient support bodies include one or more reference elements having known composition and characteristics which are reproduced in the image at a display unit. Standardization of the measured values is thereby achieved in a manner which is independent of the apparatus itself.

摘要翻译： 诸如枕头的患者支撑元件设置在位于断层摄影装置中的支撑床上的检查对象的相对侧上。 患者支撑体包括具有已知组成和特征的一个或多个参考元件，其在显示单元的图像中再现。 从而以独立于设备本身的方式实现测量值的标准化。