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    Multiple mode digital X-ray imaging system
    5.
    发明授权
    Multiple mode digital X-ray imaging system 有权
    多模数字X射线成像系统

    公开(公告)号：US06424750B1

    公开(公告)日：2002-07-23

    申请号：US09309725

    申请日：1999-05-11

    申请人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    发明人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    IPC分类号： G06T500

    CPC分类号： H04N5/347 ,  H04N5/32 ,  H04N5/367

    摘要： A multiple mode digital X-ray imaging system providing for preprocessing “binning” of analog pixel signals from a detector array by selectively summing, within the detector array, adjacent pixel charges on a row-by-row basis and selectively summing, within detector array readout circuits, the previously summed pixel charges (by rows) on a column-by-column basis. An array, or mapping, of “defective pixel” flags is used to identify defective pixels within the detector array, with such flags being added to, or inserted into, the incoming data stream for dynamic processing along with the incoming pixel data. A buffer and filter is used to perform still image capture during the radiographic mode of operation and to recursively filter incoming data frames during the fluoroscopic mode of operation by summing a scaled amount of pixel data from prior data frames with a scaled amount of incoming pixel data from the present data frame.

    摘要翻译： 一种多模式数字X射线成像系统，其通过在检测器阵列内以逐行为基础选择性地相加相邻像素电荷并在检测器阵列内进行选择性求和，来提供从检测器阵列“模拟”模拟像素信号 读出电路，先前相加的像素电荷（按行）逐列。 使用“缺陷像素”标志的阵列或映射来识别检测器阵列内的有缺陷的像素，其中这些标记被附加到输入数据流中或插入到输入数据流中，以便与输入像素数据一起进行动态处理。 使用缓冲器和滤波器在放射线照相操作模式下执行静态图像捕获，并且在荧光镜操作模式期间递归滤波输入数据帧，通过将来自先前数据帧的像素数据的缩放量与输入像素数据的标度量相加 从当前的数据帧。

    Multiple mode digital X-ray imaging system
    6.
    发明授权
    Multiple mode digital X-ray imaging system 有权
    多模数字X射线成像系统

    公开(公告)号：US06744912B2

    公开(公告)日：2004-06-01

    申请号：US10167092

    申请日：2002-06-10

    申请人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    发明人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    IPC分类号： G06T500

    CPC分类号： H04N5/367 ,  H04N5/32 ,  H04N5/335 ,  H04N5/347

    摘要： A multiple mode digital X-ray imaging system providing for preprocessing “binning” of analog pixel signals from a detector array by selectively summing, within the detector array, adjacent pixel charges on a row-by-row basis and selectively summing, within detector array readout circuits, the previously summed pixel charges (by rows) on a column-by-column basis. An array, or mapping, of “defective pixel” flags is used to identify defective pixels within the detector array, with such flags being added to, or inserted into, the incoming data stream for dynamic processing along with the incoming pixel data. A buffer and filter is used to perform still image capture during the radiographic mode of operation and to recursively filter incoming data frames during the fluoroscopic mode of operation by summing a scaled amount of pixel data from prior data frames with a scaled amount of incoming pixel data from the present data frame.

    摘要翻译： 一种多模式数字X射线成像系统，其通过在检测器阵列内以逐行为基础选择性地相加相邻像素电荷并在检测器阵列内进行选择性求和，来提供从检测器阵列“模拟”模拟像素信号 读出电路，先前相加的像素电荷（按行）逐列。 使用“缺陷像素”标志的阵列或映射来识别检测器阵列内的有缺陷的像素，其中这些标记被附加到输入数据流中或插入到输入数据流中，以便与输入像素数据一起进行动态处理。 使用缓冲器和滤波器在放射线照相操作模式下执行静态图像捕获，并且在荧光镜操作模式期间递归滤波输入数据帧，通过将来自先前数据帧的像素数据的缩放量与输入像素数据的标度量相加 从当前的数据帧。

    Multiple mode digital X-ray imaging system
    7.
    发明授权
    Multiple mode digital X-ray imaging system 失效

    公开(公告)号：US5970115A

    公开(公告)日：1999-10-19

    申请号：US978177

    申请日：1997-11-25

    申请人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    发明人： Richard E. Colbeth ,  John M. Pavkovich ,  Edward J. Seppi ,  Edward G. Shapiro

    IPC分类号： H04N5/217 ,  H04N5/32 ,  H04N5/347 ,  H04N5/367 ,  G01N23/04

    CPC分类号： H04N5/347 ,  H04N5/32 ,  H04N5/367

    摘要： A multiple mode digital X-ray imaging system providing for preprocessing "binning" of analog pixel signals from a detector array by selectively summing, within the detector array, adjacent pixel charges on a row-by-row basis and selectively summing, within detector array readout circuits, the previously summed pixel charges (by rows) on a column-by-column basis. An array, or mapping, of "defective pixel" flags is used to identify defective pixels within the detector array, with such flags being added to, or inserted into, the incoming data stream for dynamic processing along with the incoming pixel data. A buffer and filter is used to perform still image capture during the radiographic mode of operation and to recursively filter incoming data frames during the fluoroscopic mode of operation by summing a scaled amount of pixel data from prior data frames with a scaled amount of incoming pixel data from the present data frame.

    Method for increasing the accuracy of a radiation therapy apparatus
    8.
    发明授权
    Method for increasing the accuracy of a radiation therapy apparatus 失效
    增加辐射治疗装置精度的方法

    公开(公告)号：US5099505A

    公开(公告)日：1992-03-24

    申请号：US547799

    申请日：1990-07-02

    申请人： Edward J. Seppi ,  Edward G. Shapiro ,  John M. Pavkovich

    发明人： Edward J. Seppi ,  Edward G. Shapiro ,  John M. Pavkovich

    IPC分类号： A61B6/03 ,  A61N5/10 ,  G01T1/164 ,  H05G1/64

    CPC分类号： H05G1/64 ,  A61B6/032 ,  A61B6/583 ,  A61N5/1048 ,  G01T1/1645 ,  A61B6/548

    摘要： Disclosed is a method for increasing the accuracy of images obtained in radiation therapy apparatus, such as a computed tomography simulator which employs an image intensifier and a photodiode detector for converting light from the image intensifier to electrical signals for further processing. The method recognizes that a significant amount of crosstalk can exist in the image intensifier and photodiode detector chain and provides a series of steps for adjusting the electrical signals obtained from the photodiode detector to compensate for the crosstalk.

    摘要翻译： 公开了一种增加放射治疗装置中所获得的图像的精度的方法，例如使用图像增强器的计算机断层摄影模拟器和用于将来自图像增强器的光转换为电信号以用于进一步处理的光电二极管检测器。 该方法认识到，图像增强器和光电二极管检测器链中可能存在显着量的串扰，并且提供了一系列步骤来调整从光电二极管检测器获得的电信号以补偿串扰。

    Method for improving the dynamic range of an imaging system
    9.
    发明授权
    Method for improving the dynamic range of an imaging system 失效
    改进成像系统动态范围的方法

    公开(公告)号：US5168532A

    公开(公告)日：1992-12-01

    申请号：US547451

    申请日：1990-07-02

    申请人： Edward J. Seppi ,  Edward G. Shapiro ,  John M. Pavkovich

    发明人： Edward J. Seppi ,  Edward G. Shapiro ,  John M. Pavkovich

    IPC分类号： A61B6/03 ,  G06T1/00 ,  H04N5/32 ,  H05G1/60

    CPC分类号： H05G1/60 ,  H04N5/32 ,  A61B6/548 ,  A61B6/583

    摘要： Disclosed is a method for improving the dynamic resolution of an imaging system. The method employs a dual sampling or exposure technique which samples light from an image intensifier over a long and a short sample interval. When the resulting measurement for the long sample interval exceeds a threshold level, the short sample interval measurement is used, multiplied by a scaling factor. Below the threshold the long sample interval is used.

    摘要翻译： 公开了一种用于改善成像系统的动态分辨率的方法。 该方法采用双取样或曝光技术，其通过长和短的采样间隔对来自图像增强器的光进行采样。 当长采样间隔的结果测量值超过阈值电平时，使用短采样间隔测量值乘以比例因子。 低于阈值时，使用较长的采样间隔。