公开(公告)号：US06307918B1

公开(公告)日：2001-10-23

申请号：US09140112

申请日：1998-08-25

申请人： Thomas L. Toth ,  Carmine F. Vara ,  Willi W. Hampel

发明人： Thomas L. Toth ,  Carmine F. Vara ,  Willi W. Hampel

IPC分类号： G21K300

CPC分类号： A61B6/032 ,  A61B6/4035 ,  G21K1/10

摘要： The present invention, in one form, is an imaging system which, in one embodiment, utilizes a filter assembly including a plurality of filter portions for altering the intensity and quality of an x-ray beam. Specifically, in one embodiment, by positioning the filter assembly so that the x-ray beam is filtered by the first portion of the filter assembly, the x-ray beam is altered to perform a body portion scan. By positioning the filter assembly to the second portion, the x-ray beam is altered to perform a head portion scan.

摘要翻译： 本发明在一种形式中是一种成像系统，其在一个实施例中利用包括多个滤光器部分的滤光器组件来改变X射线束的强度和质量。 具体地说，在一个实施例中，通过将过滤器组件定位成使得X射线束被过滤器组件的第一部分过滤，改变x射线束以执行身体部位扫描。 通过将过滤器组件定位到第二部分，改变X射线束以执行头部扫描。

公开(公告)号：US06173039B2

公开(公告)日：2001-01-09

申请号：US09140108

申请日：1998-08-25

申请人： Willi W. Hampel ,  Russell W. Hum ,  Carmine F. Vara, Jr. ,  Steven J. Woloschek

发明人： Willi W. Hampel ,  Russell W. Hum ,  Carmine F. Vara, Jr. ,  Steven J. Woloschek

IPC分类号： A61B603

CPC分类号： A61B6/5205 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4021 ,  A61B6/4085 ,  A61B6/542

摘要： Methods and apparatus for dose reduction in a computed tomography (CT) system are described. In one embodiment, the CT system includes a pre-patient collimator and a configurable multislice detector array. The pre-patient collimator includes a plurality of eccentric cams and a filtration device for altering the x-ray beam radiated from a x-ray source. The eccentric cams are positioned to collimate the x-ray beam and may be independently positioned to provide z-axis correction of the x-ray beam. The filtration device includes a plurality of filters for altering the x-ray beam. In operation, an operator selects the type of test and the quantity and thickness of the slices. After altering the detector and collimator configuration, slice data for each slice is gathered.

摘要翻译： 描述了计算机断层摄影（CT）系统中剂量减少的方法和装置。 在一个实施例中，CT系统包括患者前准直仪和可配置多层检测器阵列。 患者前准直仪包括多个偏心凸轮和用于改变从x射线源辐射的X射线束的过滤装置。 偏心凸轮被定位成准直x射线束，并且可以独立地定位以提供x射线束的z轴校正。 过滤装置包括用于改变X射线束的多个过滤器。 在操作中，操作者选择测试的类型以及切片的数量和厚度。 在更改检测器和准直器配置后，收集每个切片的切片数据。

公开(公告)号：US06298117B1

公开(公告)日：2001-10-02

申请号：US09693367

申请日：2000-10-20

申请人： Willi W. Hampel ,  Russell W. Hum ,  Carmine F. Vara, Jr. ,  Steven J. Woloschek

发明人： Willi W. Hampel ,  Russell W. Hum ,  Carmine F. Vara, Jr. ,  Steven J. Woloschek

IPC分类号： A61B603

CPC分类号： A61B6/5205 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4021 ,  A61B6/4085 ,  A61B6/542

摘要： Methods and apparatus for dose reduction in a computed tomography (CT) system are described. In one embodiment, the CT system includes a pre-patient collimator and a configurable multislice detector array. The pre-patient collimator includes a plurality of eccentric cams and a filtration device for altering the x-ray beam radiated from a x-ray source. The eccentric cams are positioned to collimate the x-ray beam and may be independently positioned to provide z-axis correction of the x-ray beam. The filtration device includes a plurality of filters for altering the x-ray beam. In operation, an operator selects the type of test and the quantity and thickness of the slices. After altering the detector and collimator configuration, slice data for each slice is gathered.

摘要翻译： 描述了计算机断层摄影（CT）系统中剂量减少的方法和装置。 在一个实施例中，CT系统包括患者前准直仪和可配置多层检测器阵列。 患者前准直仪包括多个偏心凸轮和用于改变从X射线源辐射的X射线束的过滤装置。 偏心凸轮被定位成准直x射线束，并且可以独立地定位以提供x射线束的z轴校正。 过滤装置包括用于改变X射线束的多个过滤器。 在操作中，操作者选择测试的类型以及切片的数量和厚度。 在更改检测器和准直器配置后，收集每个切片的切片数据。

公开(公告)号：US06198791B1

公开(公告)日：2001-03-06

申请号：US09140289

申请日：1998-08-25

申请人： Hui David He ,  Hui Hu ,  Robert F. Senzig ,  Gary R. Strong ,  Guy M. Besson ,  David M. Hoffman ,  George E. Seidenschnur ,  Armin H. Pfoh ,  Jonathan A. Murray ,  Thomas L. Toth ,  Willi W. Hampel

发明人： Hui David He ,  Hui Hu ,  Robert F. Senzig ,  Gary R. Strong ,  Guy M. Besson ,  David M. Hoffman ,  George E. Seidenschnur ,  Armin H. Pfoh ,  Jonathan A. Murray ,  Thomas L. Toth ,  Willi W. Hampel

IPC分类号： A61B600

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085

摘要： The present invention is, in one aspect, an imaging system having a detector that has multiple detector cells extending along a z-axis, the detector being configured to collect multiple slices of data; and a scalable data acquisition system configured to convert signals from the detector to digital form, the scalable data acquisition system having a plurality of converter boards each with a plurality of channels, the channels and detector cells having an interweaved coupling to reduce susceptibility to band artifact.

摘要翻译： 本发明在一个方面是一种具有检测器的成像系统，所述检测器具有沿z轴延伸的多个检测器单元，所述检测器被配置为收集多个数据片段; 以及可配置成将来自检测器的信号转换成数字形式的可伸缩数据采集系统，所述可伸缩数据采集系统具有多个转换器板，每个转换器板具有多个通道，所述通道和检测器单元具有交织耦合以减少对带状伪影的敏感性 。

公开(公告)号：US5054041A

公开(公告)日：1991-10-01

申请号：US495687

申请日：1990-03-19

申请人： Willi W. Hampel

发明人： Willi W. Hampel

IPC分类号： A61B6/03 ,  G21K1/02

CPC分类号： G21K1/02

摘要： An x-ray collimator for collimating an x-ray beam is constructed of a rotatable mandrel with a series of longitudinal slots of varying widths. The width of the collimated beam may be controlled by rotating the mandrel so that the correct slot lines up with the uncollimated x-ray beam. The angle of the beam may also be corrected by smaller angular rotations of the mandrel to offset the exit aperture of the slot. The entrance aperture of each slot is larger than the exit aperture so that such centerline adjustments do not affect the x-ray fan beam width. A very low backlash brake holds the mandrel against perturbing torques when collimator is in position. The brake includes a friction element and a means of reducing the torque of the positioning motor to reduce the effect of such perturbing torques.

公开(公告)号：US4975933A

公开(公告)日：1990-12-04

申请号：US498409

申请日：1990-03-26

申请人： Willi W. Hampel

发明人： Willi W. Hampel

IPC分类号： A61B6/03 ,  G21K1/10 ,  G21K3/00

CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/482 ,  G21K1/10

摘要： A polymer attenuation filter in a CT machine is mounted at its center and allowed to expand freely at its ends to prevent cracking of the filter as it expands with temperature and after it becomes brittle with x-ray exposure. Vertical expansion of the filter at its center is accommodated by a stress relief hole cut between the center fastening points. Relatively greater horizontal expansion is accommodated by means of spring clamping. Difference in expansion between a metallic strip filter and its support is accommodated by tightly affixing the ends of the filter to the support so that the metallic strip is always under tension and cannot buckle.