公开(公告)号：US20070101982A1

公开(公告)日：2007-05-10

申请号：US11540926

申请日：2006-09-30

申请人： Kenlip Ong ,  Kwok Tam ,  Tai Lee

发明人： Kenlip Ong ,  Kwok Tam ,  Tai Lee

IPC分类号： F41B11/00

CPC分类号： F41B11/646 ,  F41B11/54 ,  F41B11/643 ,  F41B11/89

摘要： A toy launcher for launching soft darts includes a housing; a motor in the housing; a dart magazine subassembly supported by the housing; a dart magazine rotation subassembly supported by the housing and operated by the motor; and a dart launcher assembly supported by the housing and operated by the motor.

摘要翻译： 用于发射软飞镖的玩具发射器包括壳体; 房屋中的电机; 由壳体支撑的飞镖杂志组件; 由壳体支撑并由电动机操作的飞镖仓旋转子组件; 以及由壳体支撑并由电动机操作的飞镖发射器组件。

公开(公告)号：US06763081B2

公开(公告)日：2004-07-13

申请号：US10262761

申请日：2002-10-02

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： G21K112

CPC分类号： G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T2211/432 ,  Y10S378/901

摘要： Improved image reconstruction methods for cone beam ROI (region of interest) imaging of long objects with an area detector using a two or more circular scans and a connecting line scan, wherein essentially the entire detector area is utilized for acquiring cone beam data for all source positions.

摘要翻译： 使用两个或多个圆形扫描和连接线扫描的具有区域检测器的长对象的锥形束ROI（感兴趣区域）成像的改进的图像重建方法，其中基本上整个检测器区域用于获取所有源的锥形束数据 职位

公开(公告)号：US06574297B2

公开(公告)日：2003-06-03

申请号：US10015716

申请日：2001-10-30

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： A61B603

CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T2211/432 ,  Y10S378/901

摘要： A system and method for accurately reconstructing an image of a ROI (region of interest) within a long object by removing components associated with data contamination. In one aspect, an image reconstruction method comprises collecting a set of image data along a spiral scan path of a ROI (region of interest) portion of an object, identifying contaminated data within the collected set of image data, the contaminated data corresponding to image data associated with an object outside the ROI, and reconstructing an image of the ROI using the set of image data less the contaminated data.

摘要翻译： 一种用于通过去除与数据污染相关的组件来精确重建长对象内的ROI（感兴趣区域）的图像的系统和方法。 一方面，一种图像重建方法包括沿着对象的ROI（感兴趣区域）部分的螺旋扫描路径收集一组图像数据，识别所收集的图像数据集内的污染数据，对应于图像的污染数据 与ROI之外的对象相关联的数据，以及使用所述一组图像数据来重构ROI的图像，而不是被污染的数据。

公开(公告)号：US06330298B1

公开(公告)日：2001-12-11

申请号：US09690629

申请日：2000-10-17

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： A61B663

CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T2211/416 ,  Y10S378/901

摘要： A method and apparatus for three dimensional (3D) computerized tomographic (CT) imaging of an object, wherein image reconstruction processing is applied to a plurality of sets of 2D cone beam projection data, each set being acquired on a 2D detector at a corresponding plurality of scan path source positions. A first image reconstruction processing step comprises applying a mask to each set of the projection data so that data inside the boundaries of each mask form a corresponding plurality of masked 2D data sets. Next, the data inside each masked 2D data set is processed along line segments formed in the masked 2D data set, and having their endpoints determined by the mask boundaries, to develop a first 2D estimate of data determined from a given set of the 2D cone beam projection data. The next step comprises developing 2D correction data for each of the first 2D estimates of data by performing a one-dimensional (1D) convolving procession portions of the masked projection data to develop said 2D correction data. The final step comprises combining each of the first estimates of data and the 2D correction data calculated therefore, in a process which reconstructs an exact 3D image of the object.

摘要翻译： 一种用于对象的三维（3D）计算机断层摄影（CT）成像的方法和装置，其中将图像重建处理应用于多组2D锥形束投影数据，每组在相应的多个2D检测器上获取 的扫描路径源位置。 第一图像重建处理步骤包括将掩模应用于每组投影数据，使得每个掩模的边界内的数据形成对应的多个被掩蔽的2D数据集。 接下来，每个被掩蔽的2D数据集内的数据沿着形成在掩蔽的2D数据集中的线段进行处理，并且其端点由掩模边界确定，以形成从给定的2D锥组确定的数据的第一2D估计 光束投影数据。 下一步骤包括通过执行掩蔽的投影数据的一维（1D）卷积处理部分来开发所述2D校正数据来开发用于数据的第一2D估计中的每一个的2D校正数据。 最后一步包括在重建物体的精确3D图像的过程中组合数据的第一估计和由此计算的2D校正数据中的每一个。

公开(公告)号：US6130930A

公开(公告)日：2000-10-10

申请号：US274189

申请日：1999-03-22

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： A61B6/03

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

摘要： A scanning and data acquisition method and apparatus for three dimensional (3D) computerized tomography (CT) imaging of an ROI in an object, wherein data is calculated on a plurality of line segments L formed in cone beam projection data acquired on a detector at a plurality of source positions. The endpoints of the line segments L formed in the data acquired at each of the source positions is determined by a data combination mask having its bounds formed by cone beam projection onto the plane of the detector of portions of the source scan path that are above and below the source position that acquired the cone beam data in which the data for the line segments L are being calculated. When processing cone beam data near the top or bottom edges of the ROI, a first group of the line segments L has both of its endpoints determined by the boundaries of the data combination mask, and a second group of the line segments L has one of its endpoints determined by a boundary of the data combination mask, and another of its endpoints determined by the x-axis of the mask, so as to avoid data corruption from x-rays that passed outside the ROI. The line integral data calculated for both groups of the line segments L formed in the mask are then processed using an image reconstruction technique for providing a contribution to a 3D image reconstruction of the ROI in the object.

摘要翻译： 一种用于对象中的ROI的三维（3D）计算机断层摄影（CT）成像的扫描和数据采集方法和装置，其中，数据是在形成在锥形束投影数据中的多个线段L上计算的 多个源位置。 在每个源位置处获取的数据中形成的线段L的端点由数据组合掩模确定，其数据组合掩模具有通过锥形束投影形成的界限，其位于源扫描路径部分的检测器的平面上方， 低于获取其中正在计算线段L的数据的锥形束数据的源位置。 当在ROI的顶部或底部边缘附近处理锥形束数据时，第一组线段L具有由数据组合掩模的边界确定的两个端点，并且第二组线段L具有 其端点由数据组合掩码的边界确定，以及由掩码的x轴确定的另一端点，以避免通过ROI外部的x射线的数据损坏。 然后，使用图像重建技术对形成在掩模中的线段L的两组进行计算的线积分数据，以对对象中的ROI的3D图像重建提供贡献。

公开(公告)号：US06928137B2

公开(公告)日：2005-08-09

申请号：US10671894

申请日：2003-09-26

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer ,  Kwok Tam

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer ,  Kwok Tam

IPC分类号： A61B6/03 ,  G06T11/00 ,  G01N23/083

CPC分类号： G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/488

摘要： In a method for generating an image of an examination subject with a tomography-capable X-ray device, particularly a computed tomography device, having a multi-row X-ray detector array, an X-ray radiator that rotates about a system axis and emits a conical x-ray beam, and a positioning device by means of which the subject is positionable relative to the X-ray radiator in different z-positions in a direction parallel to the system axis, the image is reconstructed from the raw data that are generated from the X-ray radiator. Raw data are generated from both a rotation scan and a linear scan. In the linear scan, all transmission values for the image reconstruction are acquired in one continuous linear scanning movement, so that the rotation scan can be picked up while the X-ray radiator is in continuous rotation. A topogram that is executed prior to the actual rotation scan for the purpose of selecting a region of interest of the subject for the subsequent rotation scan can be utilized as a linear measurement dataset. A particularly rapid acquisition of initial data for the subsequent 3D image reconstruction occurs.

摘要翻译： 在利用具有X射线检测器阵列的X射线照相装置，具有X射线检测器阵列的计算机断层摄影装置的X射线照相装置的X线摄像装置， 发射圆锥形X射线束和定位装置，通过该定位装置，对象可以相对于X射线辐射器在与系统轴平行的方向上的不同Z位置定位，从原始数据重建图像， 由X射线辐射器产生。 原始数据是从旋转扫描和线性扫描生成的。 在线性扫描中，在一次连续线性扫描运动中获取图像重建的所有透射值，使得在X射线辐射器连续旋转的同时可以拾取旋转扫描。 在实际旋转扫描之前执行的用于选择用于后续旋转扫描的对象的感兴趣区域的目的地图可被用作线性测量数据集。 发生对后续3D图像重建的初始数据的特别快速的获取。

公开(公告)号：US06233303B1

公开(公告)日：2001-05-15

申请号：US09358071

申请日：1999-07-21

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： A61B603

CPC分类号： A61B6/06 ,  A61B6/027 ,  A61B6/032 ,  Y10S378/901

摘要： A scanning and data acquisition method and apparatus for three dimensional (3D) computerized tomography (CT) imaging of an ROI in an object, wherein a reconstructed image is developed by calculating reconstruction data along a plurality of line segments L formed in cone beam data acquired on a detector at a plurality of source positions about the ROI. The endpoints of the line segments L formed in the cone beam data acquired at each of the source positions is determined by a data combination mask which is applied to the cone beam data. When acquiring cone beam data near the top or bottom edges of the ROI, a radiation blocking element is operated for blocking radiation directed toward the ROI, so that only that portion of the detector is exposed to radiation.

摘要翻译： 一种用于对象中的ROI的三维（3D）计算机断层摄影（CT）成像的扫描和数据采集方法和装置，其中通过沿获得的锥形束数据中形成的多个线段L计算重建数据来开发重建图像 在关于ROI的多个源位置处的检测器上。 在每个源位置处获取的锥形束数据中形成的线段L的端点由应用于锥形束数据的数据组合掩码确定。 当在ROI的顶部或底部边缘附近获取锥形束数据时，操作辐射阻挡元件以阻挡朝向ROI的辐射，使得只有那部分探测器暴露于辐射。

公开(公告)号：US6009142A

公开(公告)日：1999-12-28

申请号：US52415

申请日：1998-03-31

申请人： Frank Sauer ,  Supun Samarasekera ,  Kwok Tam

发明人： Frank Sauer ,  Supun Samarasekera ,  Kwok Tam

IPC分类号： A61B6/03 ,  G01N23/04 ,  G06T1/00 ,  G06T11/00

CPC分类号： A61B6/032 ,  G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

摘要： A method and apparatus of operating a CT imaging apparatus having a cone beam radiation source and a 2D detector arrangement, for exactly reconstructing an image of a 3D region of interest (ROI) in an object. Measurement data acquired by the 2D detector is processed to develop sub-sets of Radon data. Each of the sub-sets of Radon data is targeted for reconstructing a corresponding local 2D ROI in a 2D parallel projection of the object. Accordingly, after a sub-set of Radon data is completely developed, it is subjected to a first inversion processing step for developing the corresponding local 2D ROI. Multiple ones of the local ROIs are then grouped together and subjected to a second inversion processing step to develop an image reconstruction of a part of the 3D ROI in the object.

摘要翻译： 一种用于操作具有锥形束辐射源和2D检测器装置的CT成像装置的方法和装置，用于精确地重建物体中的感兴趣的3D区域（ROI）的图像。 处理由2D检测器获取的测量数据，以开发Radon数据子集。 Radon数据的每个子集的目标是在对象的2D平行投影中重构相应的局部2D ROI。 因此，在Radon数据的子集完全展开之后，对第一反演处理步骤进行相应的局部2D ROI的开发。 然后将多个本地ROIs分组在一起并进行第二反演处理步骤以开发对象中的3D ROI的一部分的图像重建。

公开(公告)号：US5881123A

公开(公告)日：1999-03-09

申请号：US106537

申请日：1998-06-29

申请人： Kwok Tam

发明人： Kwok Tam

IPC分类号： A61B6/03 ,  G01B11/24 ,  G06Q50/00 ,  G06T1/00 ,  G06T11/00

CPC分类号： A61B6/032 ,  G06T11/005 ,  G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

摘要： A scanning and data acquisition method and apparatus for three dimensional (3D) computerized tomography (CT) imaging of a region-of-interest (ROI) in an object, wherein image reconstruction processing is applied to a plurality of sets of cone beam projection data, each set being acquired on a detector at a corresponding plurality of scan path source positions. A first image reconstruction processing step comprises applying a mask to each set of the projection data to form masked data sets. The mask for each data set is formed by cone beam projections onto the plane of the detector of portions of the source scan path that are above and below the source position that acquired the data set being masked. The next image reconstruction processing step comprises ramp filtering of each masked data set along a plurality of parallel lines formed therein that are parallel with and in the direction of a parallel projection into the data set of a line that is tangent to the scan path at the source position that acquired that data set and in the direction of the next source position, to generate filtered data sets. Each filtered data set is then subjected to a weighted 3D backprojection into a 3D space, thereby reconstructing in a piecewise manner a 3D image of the ROI in the object.

摘要翻译： 一种用于对象中感兴趣区域（ROI）的三维（3D）计算机断层摄影（CT）成像的扫描和数据采集方法和装置，其中将图像重建处理应用于多组锥形束投影数据 ，每组在相应的多个扫描路径源位置的检测器上获取。 第一图像重建处理步骤包括将掩模应用于每组投影数据以形成掩蔽数据集。 每个数据集的掩模由锥形束投影形成在源扫描路径部分的检测器的平面上，该扫描路径在获取被掩蔽的数据集的源位置之上和之下。 下一个图像重建处理步骤包括沿着形成在其中的多个平行线的每个被屏蔽的数据集的斜坡滤波，该平行线平行于和平行投影的方向到与该扫描路径相切的线的数据集 源位置，获取该数据集并在下一个源位置的方向上生成滤波数据集。 然后将每个经滤波的数据集经受加权的3D反投影到3D空间中，从而以分段方式重建对象中的ROI的3D图像。

公开(公告)号：US06459756B1

公开(公告)日：2002-10-01

申请号：US10015797

申请日：2001-10-30

申请人： Kwok Tam ,  Günter Lauritsch ,  Herbert Bruder

发明人： Kwok Tam ,  Günter Lauritsch ,  Herbert Bruder

IPC分类号： A61B603

CPC分类号： G06T11/005 ,  A61B6/027 ,  Y10S378/901

摘要： A system and method for 3D image reconstruction in a spiral scan cone beam computed tomography (CT) imaging system that allows the pitch of spiral scan projection to be reduced by a factor of 1/n (where n=3, 5, 7, 9, etc), thereby increasing the x-ray dosage to obtain a higher S/N (signal-to-noise) ratio, while achieving efficient use of a fixed-size detector. In addition, an image reconstruction protocol computes a correction factor for integration planes that intersect the reduced-pitch spiral path (which surrounds a ROI) at only M

摘要翻译： 用于螺旋扫描锥束计算机断层摄影（CT）成像系统中的3D图像重建的系统和方法，其允许将螺旋扫描投影的间距减小1 / n（其中n = 3,5,7,9 等），从而增加x射线剂量以获得更高的S / N（信噪比），同时实现固定尺寸检测器的有效利用。 另外，图像重构协议在仅在例如M = 1个平面确定的角度范围内的M