会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • Apparatus and Method for the Processing of Sectional Images
    • 用于处理截面图像的装置和方法
    • US20080144904A1
    • 2008-06-19
    • US10597713
    • 2005-02-01
    • Jens WiegertGeorg RoseJurgen Weese
    • Jens WiegertGeorg RoseJurgen Weese
    • G06K9/00
    • G06T5/50G06T11/005G06T2207/30004
    • The invention relates to an apparatus and a method for the processing of reconstructed 3D images (I) in C-arm based volume imaging which often exhibit spatially slowly varying inhomogeneities caused by inconsistent projection data. To correct the images (I), a retrospective homogenization procedure is proposed. The image (I) is segmented (11, 12) into principal classes like bone, tissue and air based on their gray values. Only the tissue-regions (M) are then used as support in order to fit (14) a spatially slowly varying 2D baseline (B) representing the smooth shape of cupping or other inhomogeneities. Finally the inverse of the estimated 2D baseline is subtracted from the original slice (I) to correct for the inhomogeneities.
    • 本发明涉及一种用于处理基于C臂的体积成像中的重建3D图像(I)的装置和方法,其经常表现出由不一致的投影数据引起的空间上缓慢变化的不均匀性。 为了校正图像(I),提出了回顾性均匀化程序。 图像(I)根据其灰度值被分段(11,12)成主要类,如骨,组织和空气。 然后仅使用组织区域(M)作为支撑体,以便适应(14)代表拔罐或其他不均匀性的平滑形状的空间上缓慢变化的2D基线(B)。 最后,从原始切片(I)中减去估计的2D基线的逆,以校正不均匀性。
    • 4. 发明申请
    • X-Ray Examination Apparatus and Radiation Detector
    • X射线检查仪和放射检测仪
    • US20070272871A1
    • 2007-11-29
    • US11568271
    • 2005-04-25
    • Dirk SchaferGeorg RoseJens WiegertMichael OverdickWalter Rutten
    • Dirk SchaferGeorg RoseJens WiegertMichael OverdickWalter Rutten
    • G01T1/24
    • H04N5/32
    • The invention relates to an X-ray detector (1) with an array (2) of sensor elements (21), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit (5), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit (3). In the read-out unit (3), sensor signals are preprocessed, for example amplified by amplifiers (31). The detector further comprises a control unit (6) which is adapted to set the gains of said amplifiers (31) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.
    • 本发明涉及具有传感器元件(21)阵列(2)的X射线检测器(1),其中传感器元件的每一行(i)经由寻址线连接到寻址单元(5),并且其中 传感器元件的每个列j)经由读出线连接到读出单元(3)。 在读出单元(3)中,传感器信号被预处理,例如由放大器(31)放大。 检测器还包括控制单元(6),该控制单元适于为每个列(j)和每一行(i)分别设置所述放大器(31)的增益。 增益的值可以特别地从先验知识,从对象的先前图像,或者已经被读出的行的图像信号导出。
    • 5. 发明授权
    • X-ray examination apparatus and radiation detector
    • X射线检查仪和放射线检测仪
    • US07408166B2
    • 2008-08-05
    • US11568271
    • 2005-04-25
    • Dirk SchaferGeorg RoseJens WiegertMichael OverdickWalter Rutten
    • Dirk SchaferGeorg RoseJens WiegertMichael OverdickWalter Rutten
    • G01J1/24
    • H04N5/32
    • The invention relates to an X-ray detector (1) with an array (2) of sensor elements (21), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit (5), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit (3). In the read-out unit (3), sensor signals are preprocessed, for example amplified by amplifiers (31). The detector further comprises a control unit (6) which is adapted to set the gains of said amplifiers (31) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.
    • 本发明涉及具有传感器元件(21)阵列(2)的X射线检测器(1),其中传感器元件的每一行(i)经由寻址线连接到寻址单元(5),并且其中 传感器元件的每个列j)经由读出线连接到读出单元(3)。 在读出单元(3)中,传感器信号被预处理,例如由放大器(31)放大。 检测器还包括控制单元(6),该控制单元适于为每个列(j)和每一行(i)分别设置所述放大器(31)的增益。 增益的值可以特别地从先验知识,从对象的先前图像,或者已经被读出的行的图像信号导出。
    • 6. 发明授权
    • Systems and methods for scanning and data acquisition in computed tomography (CT) applications
    • 计算机断层扫描(CT)应用中扫描和数据采集的系统和方法
    • US07782999B2
    • 2010-08-24
    • US12096443
    • 2006-09-16
    • Astrid LewalterRainer PietigGuenter ZeitlerKai EckChristoph HerrmannRainer KiewittChristoph LoefOliver MuelhensCarolina RibbingGeorg RoseMatthias SimonOlaf Wischhusen
    • Astrid LewalterRainer PietigGuenter ZeitlerKai EckChristoph HerrmannRainer KiewittChristoph LoefOliver MuelhensCarolina RibbingGeorg RoseMatthias SimonOlaf Wischhusen
    • H05G1/60H01J35/30
    • A61B6/032A61B6/027A61B6/4021A61B6/503A61B6/504H01J2235/086H05G1/52
    • Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is moved/scanned along the anode surface to multiple focal positions. Data acquisition for a full projection at one focus position and one view angle is achieved by activating each focus position multiple times during the data acquisition for one angle of the gantry. The detector array and associated data processing system are adapted to rapidly switch between the different focus positions during the acquisitions for one view angle and to collect all data belonging to the same projection into the same data set. Adaptive electron optics are utilized to move/scan the electron beam along the anode surface to the various focus positions. Alternatively, a plurality of cathodes may be provided for respective focus positions and the system may support fast switching therebetween to achieve desirably short spot times. The disclosed CT system permits greater power densities without risk of heat damage to the anode and effectively increases the track velocity of the electron beam on the anode surface. The CT system and associated data acquisition methods have particular utility in CT applications requiring increased time resolution and/or spatial resolution, e.g., cardiac CT applications.
    • 提供了计算机断层摄影(CT)应用中数据采集的系统和方法。 该系统和方法特别适用于扫描和获取/处理与大功率锥束CT应用有关的数据。 电子束沿着阳极表面移动/扫描到多个焦点位置。 通过在台架的一个角度的数据采集过程中激活每个聚焦位置多次来实现在一个聚焦位置和一个视角下的全投影的数据采集。 检测器阵列和相关联的数据处理系统适于在一次视角的采集期间在不同聚焦位置之间快速切换,并且将属于相同投影的所有数据收集到同一数据集中。 使用自适应电子光学器件将电子束沿着阳极表面移动/扫描到各种焦点位置。 或者,可以为各个焦点位置设置多个阴极,并且系统可以支持它们之间的快速切换,以实现期望的短光斑时间。 所公开的CT系统允许更大的功率密度,而不会对阳极造成热损害的风险,并且有效地增加阳极表面上的电子束的轨道速度。 CT系统和相关数据采集方法在需要增加时间分辨率和/或空间分辨率(例如心脏CT应用)的CT应用中具有特别的用途。
    • 9. 发明授权
    • Apparatus and method for the processing of perfusion images
    • 用于灌注图像处理的装置和方法
    • US08175358B2
    • 2012-05-08
    • US10598305
    • 2005-03-04
    • Jürgen WeeseGeorg Rose
    • Jürgen WeeseGeorg Rose
    • G06K9/00
    • G06T11/006A61B6/481A61B6/504A61B6/507G06T2211/424
    • The invention relates to an apparatus and a method for the reconstruction of time-dependent cross-sectional images and may be applied for example in perfusion imaging in the vessel system (2) of a patient. According to the method, projections pij are generated from a number M of different directions di and at different times tij. Moreover, the time-dependent intensity function I(x,t) of the reconstructed volume is approximated by a predetermined model function I*(a(x),t), wherein the unknown parameter vector a(x) is estimated for each voxel x. This estimation may be done using the update functions of known reconstruction algorithms like ART for at least N projections pij in each iteration step.
    • 本发明涉及用于重建时间依赖性横截面图像的装置和方法,并且可以应用于例如在患者的血管系统(2)中的灌注成像。 根据该方法,从不同方向di的数M和不同时刻tij生成投影pij。 此外,重建体积的时间依赖强度函数I(x,t)由预定的模型函数I *(a(x),t)近似,其中针对每个体素估计未知参数向量a(x) X。 可以使用已知的重建算法的更新函数(例如在每个迭代步骤中用于至少N个投影pij的ART)来完成该估计。
    • 10. 发明申请
    • Apparatus and Method for the Processing of Perfusion Images
    • 灌注图像处理装置及方法
    • US20080260231A1
    • 2008-10-23
    • US10598305
    • 2005-03-04
    • Jurgen WeeseGeorg Rose
    • Jurgen WeeseGeorg Rose
    • G06K9/00
    • G06T11/006A61B6/481A61B6/504A61B6/507G06T2211/424
    • The invention relates to an apparatus and a method for the reconstruction of time-dependent cross-sectional images and may be applied for example in perfusion imaging in the vessel system (2) of a patient. According to the method, projections pij are generated from a number M of different directions d and at different times tij. Moreover, the time-dependent intensity function I(x,t) of the reconstructed volume is approximated by a predetermined model function I*(a(x),t), wherein the unknown parameter vector a(x) is estimated for each voxel x. This estimation may be done using the update functions of known reconstruction algorithms like ART for at least N projections pij in each iteration step.
    • 本发明涉及用于重建时间依赖性横截面图像的装置和方法,并且可以应用于例如在患者的血管系统(2)中的灌注成像。 根据该方法,从不同方向d的数M和不同时间t i上产生投影p i 。 此外,重建体积的时间依赖强度函数I(x,t)由预定的模型函数I *((x),t))近似,其中未知参数向量 对于每个体素x估计U STYLE =“SINGLE”> a(x)。 可以在每个迭代步骤中使用已知的重建算法的更新功能(例如ART至少N个投影)来完成该估计。