Methods and apparatus for optimizing CT image quality with optimized data acquisition
    1.
    发明授权
    Methods and apparatus for optimizing CT image quality with optimized data acquisition 有权
    优化数据采集优化CT图像质量的方法和装置

    公开(公告)号:US06307912B1

    公开(公告)日:2001-10-23

    申请号:US09450362

    申请日:1999-11-29

    IPC分类号: G01N2300

    摘要: A method is described for optimizing signal-to-noise performance of an imaging system, including the steps of scout-scanning an object to obtain scout scan data; determining a plurality of normalized x-ray input signal factors using the scout scan data; using the normalized x-ray input signal factors to determine at least one system input signal; selecting at least one gain for the object scan using the system input signal; and applying the selected gain corresponding to the system input signal in the object scan.

    摘要翻译: 描述了一种用于优化成像系统的信噪比性能的方法,包括对目标进行侦察扫描以获得侦察扫描数据的步骤; 使用所述侦察扫描数据确定多个归一化的X射线输入信号因子; 使用归一化的x射线输入信号因子来确定至少一个系统输入信号; 使用系统输入信号为对象扫描选择至少一个增益; 以及将对应于所述系统输入信号的所选增益应用于所述对象扫描。

    Methods and apparatus to desensitize incident angle errors on a
multi-slice computed tomograph detector
    3.
    发明授权
    Methods and apparatus to desensitize incident angle errors on a multi-slice computed tomograph detector 失效
    在多层计算机断层摄影仪上对入射角误差进行脱敏的方法和装置

    公开(公告)号:US6118840A

    公开(公告)日:2000-09-12

    申请号:US8912

    申请日:1998-01-20

    摘要: Scintillators having a geometric configurations that substantially prevent x-ray beams from passing entirely through a gap between adjacent scintillators are described. More particularly, if the scintillators are cut on an angle to form parallelogram or trapezoidal shapes, or if the detector module is tilted in the x-ray beam z-axis, an x-ray beam will not pass through a non-scintillating gap between adjacent scintillators over the range of focal spot positions. Such scintillators have an increased geometric efficiency compared to known scintillator constructions.

    摘要翻译: 描述了具有基本上防止X射线束完全穿过相邻闪烁体之间的间隙的几何构型的闪烁体。 更具体地说,如果以一定角度切割闪烁体以形成平行四边形或梯形形状,或者如果检测器模块在x射线束z轴中倾斜,则X射线束将不会穿过X射线束之间的非闪烁间隙 相邻的闪烁体在焦斑位置的范围内。 与已知的闪烁体结构相比,这种闪烁体具有增加的几何效率。

    Volume imaging system
    4.
    发明授权
    Volume imaging system 失效
    体积成像系统

    公开(公告)号:US06947584B1

    公开(公告)日:2005-09-20

    申请号:US09418142

    申请日:1999-10-14

    IPC分类号: G06K9/00

    摘要: A volume imaging system which progressively constructs, analyzes, and updates three dimensional models while acquiring cross-sectional data is described. The system constructs and displays three-dimensional renderings, and performs quantitative calculations in real time during the imaging system data collection process, displays interactive three-dimensional renderings in a traditional post-data collection process, as well as prescribes, archives, films, and transmits rendering procedures, parameters, renderings, measurements, and processed data, during data collection and post-acquisition.

    摘要翻译: 描述了在获取横截面数据的同时逐步构造,分析和更新三维模型的体积成像系统。 系统构建和显示三维渲染,并在成像系统数据采集过程中实时执行定量计算,在传统的后数据采集过程中显示交互式三维渲染,以及处方,存档,影片和 在数据采集和采集之后传输渲染过程,参数,渲染,测量和处理的数据。

    Methods and apparatus for automatic image noise reduction
    5.
    发明授权
    Methods and apparatus for automatic image noise reduction 有权
    自动降噪图像的方法和装置

    公开(公告)号:US06285741B1

    公开(公告)日:2001-09-04

    申请号:US09140105

    申请日:1998-08-25

    IPC分类号: A61B600

    CPC分类号: H05G1/34 A61B6/032

    摘要: The present invention, in one form, is a system which, in one embodiment, adjusts the x-ray source current to reduce image noise to better accommodate different scanning parameters. Specifically, in one embodiment, the x-ray source current is adjusted as a function of image slice thickness, scan rotation time, collimation mode, table speed, scan mode, and filtration mode. Particularly, a function is stored in a CT system computer to determine an x-ray source current adjustment factor so that the appropriate x-ray source current is supplied to the x-ray source for the determined parameters. After adjusting the x-ray source current, an object is scanned.

    摘要翻译: 本发明以一种形式是在一个实施例中调整x射线源电流以减少图像噪声以更好地适应不同扫描参数的系统。 具体地,在一个实施例中,根据图像切片厚度,扫描旋转时间,准直模式,表速度,扫描模式和过滤模式来调整x射线源电流。 特别地,功能被存储在CT系统计算机中以确定x射线源电流调整因子,使得适当的x射线源电流被提供给所确定的参数的x射线源。 调整x射线源电流后,扫描物体。

    Methods and apparatus for modulating data acquisition system gain
    6.
    发明授权
    Methods and apparatus for modulating data acquisition system gain 失效
    调制数据采集系统增益的方法和装置

    公开(公告)号:US5828719A

    公开(公告)日:1998-10-27

    申请号:US779961

    申请日:1996-12-23

    IPC分类号: A61B6/03 G06T1/00 H05G1/30

    摘要: The present invention, in one form, is a system which, in one embodiment, varies DAS gain to better accommodate different scanning parameters between different scans, even at the same slice thickness. Specifically, in one embodiment, the DAS gain is varied, or modulated, as a function of slice thickness, x-ray tube current and voltage levels, scan time, and average detector gain. The DAS gain is modulated using a gain factor Gain.sub.-- Fac which is determined in accordance with each of the above-mentioned scanning parameters. The gain factor Gain.sub.-- Fac is then used to determine an appropriate DAS gain for such parameters. Particularly, DAS gains are stored in a look-up table in the CT system computer, and the gain factor Gain.sub.-- Fac is used to select the appropriate DAS gain from the look-up table. The determined DAS gain is then utilized to correct data acquired during a scan.

    摘要翻译: 本发明在一种形式中是在一个实施例中,即使在相同的切片厚度下也可以改变DAS增益以更好地适应不同扫描之间的不同扫描参数的系统。 具体地说,在一个实施例中,作为切片厚度,X射线管电流和电压电平,扫描时间和平均检测器增益的函数,DAS增益被改变或调制。 使用根据上述每个扫描参数确定的增益因子Gain-Fac来调制DAS增益。 然后,增益因子Gain-Fac用于确定此类参数的适当DAS增益。 特别地,DAS增益存储在CT系统计算机的查找表中,增益因子Gain-Fac用于从查找表中选择适当的DAS增益。 然后使用确定的DAS增益来校正在扫描期间获取的数据。

    Image thickness selection for multislice imaging system
    7.
    发明授权
    Image thickness selection for multislice imaging system 失效
    多层成像系统的图像厚度选择

    公开(公告)号:US06404841B1

    公开(公告)日:2002-06-11

    申请号:US09473676

    申请日:1999-12-29

    IPC分类号: A61B600

    摘要: Scalable multislice systems which, in one embodiment, includes a scalable multislice detector, a scalable data acquisition system (SDAS), scalable scan management, control, and image reconstruction processes, and a user interface, are described. More specifically, the user interface is implemented in a host computer for defining the configuration of the imaging system. Particularly, after selection of each scan parameter, the user interface displays the available scan parameter values for the remaining parameters so that the scan objectives are met. More specifically, after selection of each scan parameter, the user interface updates the remaining scan parameters, including prospective and retrospective image thicknesses.

    摘要翻译: 在一个实施例中,可扩展多层系统包括可扩展多层检测器,可伸缩数据采集系统(SDAS),可伸缩扫描管理,控制和图像重建处理以及用户界面。 更具体地,在主计算机中实现用户界面以定义成像系统的配置。 特别地,在选择每个扫描参数之后,用户界面显示剩余参数的可用扫描参数值,以便满足扫描目标。 更具体地,在选择每个扫描参数之后,用户界面更新剩余的扫描参数,包括预期和回顾图像厚度。

    Volumetric computed tomography system for cardiac imaging
    8.
    发明授权
    Volumetric computed tomography system for cardiac imaging 有权
    用于心脏成像的体积计算机断层摄影系统

    公开(公告)号:US06370217B1

    公开(公告)日:2002-04-09

    申请号:US09307400

    申请日:1999-05-07

    IPC分类号: A61B600

    摘要: The present invention, in one form is an imaging system for generating images of an entire object. In one embodiment, a physiological cycle unit is used to determine the cycle of the moving object. By altering the rotational speed of an x-ray source as a function of the object cycle, segments of projection data are collected for each selected phase of the object during each rotation. After completing a plurality of rotations, the segments of projection data are combined and a cross-sectional image of the selected phase of the object is generated. As a result, minimizing motion artifacts.

    摘要翻译: 本发明的一种形式是用于产生整个对象的图像的成像系统。 在一个实施例中,使用生理循环单元来确定移动物体的周期。 通过改变作为对象周期的函数的x射线源的旋转速度,在每个旋转期间针对对象的每个选定阶段收集投影数据的段。 在完成多个旋转之后,组合投影数据的段,并且生成对象的选定阶段的横截面图像。 结果,最小化运动伪像。

    Methods and apparatus for troubleshooting scaleable multislice imaging system
    9.
    发明授权
    Methods and apparatus for troubleshooting scaleable multislice imaging system 失效
    用于排除可扩展多层成像系统的方法和设备

    公开(公告)号:US06246743B1

    公开(公告)日:2001-06-12

    申请号:US09140290

    申请日:1998-08-25

    IPC分类号: G01N2300

    CPC分类号: A61B6/585 A61B6/032

    摘要: The present invention, in one form, is an imaging system which, in one embodiment, alters the configuration of a detector array and a data acquisition system to determine degraded component performance and generate fault isolation information. More specifically, by altering the configuration to include different combinations of detector array cells, interconnections, and one or more data acquisition channels, fault isolation information is generated.

    摘要翻译: 本发明以一种形式是一种成像系统,其在一个实施例中改变检测器阵列和数据采集系统的配置,以确定劣化的部件性能并产生故障隔离信息。 更具体地,通过改变配置以包括检测器阵列单元,互连和一个或多个数据采集通道的不同组合,产生故障隔离信息。