公开(公告)号：US20090266994A1

公开(公告)日：2009-10-29

申请号：US12446766

申请日：2007-10-24

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： G01T1/24

CPC分类号： G01T1/2985 ,  A61B6/4241 ,  A61B6/482 ,  Y10S378/901

摘要： The present invention relates to an imaging system for imaging an object (20) comprising a polychromatic radiation source (2) and an energy resolving radiation detector (6). The imaging system comprises further a driving device for moving the object (20) and the radiation source (2) relatively to each other, in order to acquire truncated projections from different directions. A calculation unit determines a k-edge component at least of one of the object (20) and a substance within the object (20) from the truncated projections and determines non-truncated projections from the determined k-edge component. A reconstruction unit constructs the object using the non-truncated projections.

摘要翻译： 本发明涉及一种用于对包括多色辐射源（2）和能量分辨放射线检测器（6）的物体（20）成像的成像系统。 成像系统还包括用于相对于彼此移动物体（20）和辐射源（2）的驱动装置，以便从不同方向获取截断的投影。 计算单元从截断的投影确定对象（20）中的一个物体和物体（20）中的至少一个的k边缘分量，并从确定的k边缘分量确定非截断的投影。 重建单元使用非截断的投影构建对象。

公开(公告)号：US07596202B2

公开(公告)日：2009-09-29

申请号：US10596470

申请日：2004-12-06

申请人： Tim Nielsen ,  Roland Proksa

发明人： Tim Nielsen ,  Roland Proksa

IPC分类号： A61B6/03

CPC分类号： G06T11/006 ,  A61B6/037 ,  G06T2211/421 ,  Y10S378/901

摘要： The invention relates to an imaging method, in which a projection data record of an examination area to be reconstructed is generated by acquiring projections from different projection directions, in particular with the aid of a computer tomograph. For each projection direction, a filter operator is determined that is optimally adapted to a projection geometry allocated to the respective projection direction. An image of the examination area is reconstructed from the projection data record by filtering the projections with the filter operators determined and by back projection of these filtered projections.

摘要翻译： 本发明涉及一种成像方法，其中特别是借助于计算机断层摄影机，通过从不同的投影方向获取投影来产生待重建的检查区域的投影数据记录。 对于每个投影方向，确定最佳地适应于分配给相应投影方向的投影几何的过滤器操作器。 通过用确定的滤波器运算和通过这些滤波的投影的反投影过滤投影来从投影数据记录重建检查区域的图像。

公开(公告)号：US20090232379A1

公开(公告)日：2009-09-17

申请号：US12471511

申请日：2009-05-26

申请人： Thomas Kohler ,  Michael Grass ,  Michael Harald Kuhn ,  Roland Proksa

发明人： Thomas Kohler ,  Michael Grass ,  Michael Harald Kuhn ,  Roland Proksa

IPC分类号： G06K9/00

CPC分类号： G06T7/20 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/30048 ,  G06T2211/404 ,  G06T2211/412

摘要： In the CT imaging of non-homogeneously moving objects such as the heart or the coronary vessel tree, there is a problem that different parts of the objects are at rest at different points in time. Thus, a gated reconstruction with a globally selected time point does not yield a sharp image of such objects. According to the present invention, a motion of the object is estimated, describing the motion of selected regions of these objects. Then, on the basis of the estimated motion, time points are determined, where these areas have minimal motion. Then, an image is reconstructed, wherein the data from which the respective regions are reconstructed, correspond to the respective time points, where the regions have minimal motion. Due to this, an improved image quality may be provided.

摘要翻译： 在诸如心脏或冠状血管树之类的非均匀运动物体的CT成像中，存在不同部分的物体在不同时间点处于静止状态的问题。 因此，具有全局选择的时间点的门控重构不会产生这样的对象的清晰图像。 根据本发明，估计对象的运动，描述这些对象的选定区域的运动。 然后，在估计运动的基础上，确定这些区域具有最小运动的时间点。 然后，重建图像，其中各个区域被重构的数据对应于各个时间点，其中区域具有最小的运动。 由此，可以提供改善的图像质量。

公开(公告)号：US20080285708A1

公开(公告)日：2008-11-20

申请号：US12090772

申请日：2006-10-11

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： G01N23/04 ,  A61B6/03

CPC分类号： A61B6/503 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028

摘要： A short scan uses only data from about 180° gantry rotation instead of a full 360° turn. In the provided short scan cardiac CT, a periodical axial focal spot movement is performed during gantry rotation, wherein the acquired data used for image reconstruction results from a 180° rotation of the gantry. After the data acquisition, an approximate reconstruction is performed. In a preferred embodiment the focal spot moves on a short scan saddle trajectory.

摘要翻译： 短扫仅使用大约180°机架旋转的数据，而不是360°全旋转。 在所提供的短扫心脏CT中，在机架旋转期间执行周期性轴向焦点运动，其中用于图像重建的所获取的数据由机架的180°旋转导致。 数据采集​​后，进行近似重构。 在优选实施例中，焦斑在短扫描马鞍轨迹上移动。

公开(公告)号：US20080187195A1

公开(公告)日：2008-08-07

申请号：US11911214

申请日：2006-04-10

申请人： Thomas Kohler ,  Roland Proksa ,  Andy Ziegler

发明人： Thomas Kohler ,  Roland Proksa ,  Andy Ziegler

IPC分类号： G06K9/00

CPC分类号： G06T11/008 ,  G06T11/006

摘要： The invention relates to an examination apparatus with an X-ray device (10) for circular or helical cone-beam CT acquisition of projections images (Pi(E1), Pi(E2)) of a patient (1) with different energy spectra (E1, E2) and/or with an energy-resolved detection. By a combination of the projections, images (Ibone,i, Itissue,i) can be calculated that show predominantly the bone structure and the soft tissue, respectively. Therefore, a 3D model (Mbone) of the bone structure and a 3D model (Mtissue) of the tissue can be reconstructed separately. After removal of artifacts from the bone-structure model (Mbone), both separate 3D models can be integrated to a combined model (M) of the body volume with a high image quality.

摘要翻译： 本发明涉及一种具有X射线装置（10）的检查装置，用于对投影图像进行圆形或螺旋锥束CT采集（P 1） 具有不同能量谱的患者（1）的患者（1）的患者（E 2） >）和/或能量分辨检测。 通过投影的组合，可以分别计算主要表现为骨骼结构和软组织的图像（I骨，I，I，I组织，i）。 因此，可以分别重建组织的骨骼结构的3D模型（M＆gt;骨头）和3D模型（M＆gt;组织）。 在从骨结构模型（骨骼）中去除人造物之后，两个分开的3D模型可以被整合到具有高图像质量的身体体积的组合模型（M）上。

公开(公告)号：US20060159327A1

公开(公告)日：2006-07-20

申请号：US10560454

申请日：2004-06-07

申请人： Thomas Kohler ,  Roland Proksa

发明人： Thomas Kohler ,  Roland Proksa

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/416

摘要： The invention relates to a computer tomography method in which a radiation source moves relative to an examination region along, in particular, a helical or circular trajectory. Measured values are acquired by a detector unit and a CT image of the examination region is reconstructed from these measured values. In the reconstruction, a complementary measured value, whose ray is oriented parallel to the ray of the respective measured value that has been acquired but in the opposite direction thereto, is determined for each of at least some measured values that lie within a reconstruction window. Redundant measured values are used to calculate the complementary measured values, with the help in particular of John's equation. The measured values for which complementary measured values have been determined are each replaced by a sum comprised a measured value that has been weighted and a complementary measured value that has been weighted, and a CT image is reconstructed, in particular by an exact method of reconstruction, from the replacement measured values, and where appropriate from acquired measured values, that lie within the reconstruction window.

摘要翻译： 本发明涉及一种计算机断层摄影方法，其中辐射源相对于沿着特别是螺旋或圆形轨迹的检查区域移动。 通过检测器单元获取测量值，并从这些测量值重建检查区域的CT图像。 在重建中，对于位于重建窗口内的至少一些测量值中的每一个确定其光线平行于已经获取但与其相反方向的相应测量值的射线的互补测量值。 冗余测量值用于计算补充测量值，特别是约翰方程式的帮助。 已经确定了互补测量值的测量值各自被包括被加权的测量值和已经加权的测量值和重建CT图像的和，特别是通过重建的精确方法 ，从替换测量值，并在适当时从获得的测量值，位于重建窗口内。

公开(公告)号：US06879655B2

公开(公告)日：2005-04-12

申请号：US10325467

申请日：2002-12-20

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： G01T1/161 ,  A61B6/00 ,  A61B6/03

CPC分类号： A61B6/541 ,  A61B6/027 ,  A61B6/032

摘要： The invention relates to a computed tomography apparatus in which measuring data of a patient is acquired along a helical trajectory by means of a conical radiation beam. The size of the detector window is then a factor of 3, 5, 7 . . . larger than the distance between neighboring turns of the helix. In order to select from among the acquired redundant data the data which is suitable for completely filling the Radon domain so as to achieve exact reconstruction, in accordance with the invention it is proposed to provide a cardiac motion signal detection device for the detection of a cardiac motion signal representing the cardiac motion and to arrange the reconstruction unit so as to select such measuring data from among the measuring data regionally redundantly filling the Radon domain that the Radon domain is completely and homogeneously filled with measuring data from cardiac motion phases with as little motion as possible.

摘要翻译： 本发明涉及一种计算机断层摄影装置，其中通过锥形辐射束沿着螺旋轨迹获取患者的测量数据。 检测器窗口的大小是因子3，5，7。 。 。 大于螺旋的相邻匝之间的距离。 为了从获取的冗余数据中选择适合于完全填充氡域以便实现精确重建的数据，根据本发明，提出了提供一种用于心脏检测的心脏运动信号检测装置 表示心脏运动的运动信号并且布置重建单元，以便从区域上的区域地选择这样的测量数据，从而从雷达域域中冗余地填充氡域完全并均匀地填充来自心脏运动相位的测量数据，同时运动量少 尽可能。

公开(公告)号：US06817762B2

公开(公告)日：2004-11-16

申请号：US10297855

申请日：2002-12-10

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： A61B608

CPC分类号： A61B6/032 ,  A61B6/12 ,  A61B6/4085

摘要： A fluoroscopy intervention method to obtain an image of an object (11) together with radiopaque intervention means (30), the method using a rotating cone-beam X-ray source (8,9) and a corresponding two-dimensional X-ray detector (6) with the object (11) and the intervention means (30) positioned between the X-ray source (8) and the X-ray detector (6). Due to a cone-beam acquisition and a multi-slice reconstruction (9′) the intervention means (30) can have a substantial angulation with respect to the image slices (9′), providing the operator's hand (4) being outside the primary X-ray beam (9). This reduces the X-ray dose the operator. By providing additional lighting means (60), delineating the primary X-ray source at its periphery, the operator is supplied with an information about the spatial position of the X-ray radiation. The lighting means (60) can be further used to position an X-ray shield (65) of a surface of the patient to reduce the X-ray dose due to scattered radiation.

摘要翻译： 一种用于获得物体（11）的图像以及不透射线干预装置（30）的透视干预方法，所述方法使用旋转锥形束X射线源（8,9）和相应的二维X射线检测器 （6）和位于X射线源（X）和X射线检测器（6）之间的干预装置（30）的物体（6）。 由于锥束获取和多切片重建（9'），干涉装置（30）可以相对于图像切片（9'）具有大的角度，从而提供操作者的手（4）在主要 X射线束（9）。 这降低了操作者的X射线剂量。 通过提供附加的照明装置（60），在其周边描绘主X射线源，向操作者提供关于X射线辐射的空间位置的信息。 照明装置（60）还可用于定位患者表面的X射线屏蔽（65）以减少由于散射辐射引起的X射线剂量。

公开(公告)号：US06480561B2

公开(公告)日：2002-11-12

申请号：US09759178

申请日：2001-01-12

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： A61B600

CPC分类号： A61B6/032 ,  A61B6/027

摘要： The invention relates to a method of forming a scannogram for a computed tomography apparatus. During the acquisition of the measured values for the scannogram, the scanning unit or the radiation source rotates about the examination zone and a 3D data set is reconstructed from the measured values acquired during the acquisition. A synthetic projection image which acts as the scannogram can be calculated from such a 3D data set.

摘要翻译： 本发明涉及一种形成计算机断层摄影装置的扫描图的方法。 在获取扫描图的测量值期间，扫描单元或辐射源围绕检查区域旋转，并且从获取期间获取的测量值重建3D数据集。 可以从这样的3D数据集计算用作扫描图的合成投影图像。

公开(公告)号：US06442230B1

公开(公告)日：2002-08-27

申请号：US09527199

申请日：2000-03-16

申请人： Jantje E. Wilting ,  Roland Proksa ,  John A. M. Verbruggen

发明人： Jantje E. Wilting ,  Roland Proksa ,  John A. M. Verbruggen

IPC分类号： A61B600

CPC分类号： A61B6/035 ,  A61B6/08 ,  A61B6/547

摘要： A computed tomography system includes a gantry provided with an examination opening. The computed tomography system is provided with a position measuring system for measuring the position of the gantry. Preferably, an optical position measuring system which includes a camera unit is employed. The camera unit is suspended from a suspension point above the gantry.

摘要翻译： 计算机断层摄影系统包括设有检查口的龙门架。 计算机断层摄影系统设置有用于测量台架位置的位置测量系统。 优选地，采用包括相机单元的光学位置测量系统。 摄像机单元从机架上方的悬挂点悬挂。