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    RADIATION IMAGING SYSTEM AND OPERATING METHOD THEREOF, AND RADIATION IMAGE DETECTING DEVICE
    2.
    发明申请
    RADIATION IMAGING SYSTEM AND OPERATING METHOD THEREOF, AND RADIATION IMAGE DETECTING DEVICE 有权
    辐射成像系统及其工作方法及辐射图像检测装置

    公开(公告)号：US20140205066A1

    公开(公告)日：2014-07-24

    申请号：US14225762

    申请日：2014-03-26

    Applicant: FUJIFILM Corporation

    Inventor： Yusuke KITAGAWA ,  Takashi TAJIMA ,  Keita WATANABE ,  Takeshi KAMIYA

    IPC: A61B6/00

    CPC classification number: A61B6/542 ,  A61B6/025 ,  A61B6/06 ,  A61B6/08 ,  A61B6/4233 ,  A61B6/4283 ,  A61B6/505 ,  A61B6/5241 ,  A61B6/547 ,  G01T1/2018 ,  G03B42/02 ,  H04N5/32

    Abstract: A measurement area selection circuit has an irradiation field determination unit, an object area determination unit, and a measurement area determination unit. The irradiation field determination unit determines an irradiation field of an imaging surface of an FPD. The object area determination unit determines an object area from a comparison result between a first expected received dose of a directly exposed area and dose detection signals of detection pixels situated in the irradiation field. The measurement area determination unit determines a measurement area, which corresponds to a region of interest, from a comparison result between a second expected received dose of the measurement area and the dose detection signals of the detection pixels situated in the irradiation area and the object area. The dose detection signals of the detection pixels situated in the measurement area are used for AEC.

    Abstract translation: 测量区域选择电路具有照射场确定单元，对象区域确定单元和测量区域确定单元。 照射场确定单元确定FPD的成像表面的照射场。 对象区域确定单元从直接曝光区域的第一预期接收剂量与位于照射场中的检测像素的剂量检测信号之间的比较结果确定对象区域。 测量区域确定单元从测量区域的第二预期接收剂量与位于照射区域中的检测像素的剂量检测信号与对象区域之间的比较结果中确定与感兴趣区域相对应的测量区域 。 位于测量区域的检测像素的剂量检测信号用于AEC。

    RADIOGRAPHIC IMAGE DETECTOR
    3.
    发明申请
    RADIOGRAPHIC IMAGE DETECTOR 有权
    放射影像检测器

    公开(公告)号：US20150301200A1

    公开(公告)日：2015-10-22

    申请号：US14755449

    申请日：2015-06-30

    Applicant: FUJIFILM Corporation

    Inventor： Keita WATANABE

    IPC: G01T1/24 ,  H04N5/32

    CPC classification number: G01T1/247 ,  G01T1/243 ,  H04N5/32

    Abstract: A flat panel detector (FPD) includes an imaging panel having pixels arranged in a matrix, a gate driver for turning thin film transistors (TFTs) of the pixels ON and OFF, a radiation detecting section for detecting the start of x-ray radiation from the x-ray source, and a controller. The controller controls the gate driver to turn the TFTs ON periodically to reset dark charges of the pixels. Before starting a charge accumulating operation for accumulating signal charges for imaging, the controller controls the gate driver to turn the TFTs OFF so that the radiation detecting section may detect the start of x-ray radiation on the basis of charge leaks from the pixels. When the start of x-ray radiation is detected, the controller starts the charge accumulating operation while keeping the TFTs in the OFF condition. Thereafter, the TFTs are turned ON to read out the accumulated signal charges.

    Abstract translation: 平板检测器（FPD）包括具有排列成矩阵的像素的成像面板，用于转动像素的薄膜晶体管（TFT）的导通和截止的栅极驱动器，用于检测从X射线 X射线源和控制器。 控制器控制栅极驱动器周期性地打开TFT，以重置像素的暗电荷。 在开始累积用于成像的信号电荷的电荷累积操作之前，控制器控制栅极驱动器关闭TFT，使得放射线检测部分可以基于来自像素的电荷泄漏来检测X射线辐射的开始。 当检测到X射线辐射的开始时，控制器在保持TFT处于OFF状态的同时开始电荷累积操作。 此后，TFT被导通以读出累加的信号电荷。

    RADIOGRAPHIC IMAGE DETECTOR AND CONTROLLING METHOD THEREFOR
    4.
    发明申请
    RADIOGRAPHIC IMAGE DETECTOR AND CONTROLLING METHOD THEREFOR 有权
    放射影像检测器及其控制方法

    公开(公告)号：US20130136234A1

    公开(公告)日：2013-05-30

    申请号：US13683428

    申请日：2012-11-21

    Applicant: FUJIFILM Corporation

    Inventor： Kentaro NOMA ,  Kenji NAKAMURA ,  Naoto IWAKIRI ,  Kouichi KITANO ,  Keita WATANABE

    IPC: H05G1/64

    CPC classification number: H05G1/64 ,  A61B6/548 ,  G01T1/171 ,  H04N5/32

    Abstract: A flat panel detector has pixels for obtaining image signals and detective pixels for detecting the amount of incident x-rays. A signal processing circuit is of a pipeline-type, wherein first and second buffer memories are connected to the output of an A/D converter. In a dose detecting operation, the signal processing circuit repeats primary cycles alternately with secondary cycles of a shorter length than the primary cycles. In the primary cycle, a dose detection signal based on electric charges from the detective pixels is input in the first buffer memory and, simultaneously, a dummy signal is output from the second buffer memory. In secondary cycle, the dose detection signal is output from the first buffer memory and, simultaneously, a second dummy signal is input in the second buffer memory. On the basis of the dose detection signals, a start-of-radiation detector detects the start of x-ray radiation.

    Abstract translation: 平板检测器具有用于获得图像信号的像素和用于检测入射X射线量的检测像素。 信号处理电路是流水线型的，其中第一和第二缓冲存储器连接到A / D转换器的输出端。 在剂量检测操作中，信号处理电路以比主要周期短的次级循环交替重复主循环。 在主循环中，基于来自检测像素的电荷的剂量检测信号被输入到第一缓冲存储器中，同时从第二缓冲存储器输出虚拟信号。 在二次循环中，从第一缓冲存储器输出剂量检测信号，同时在第二缓冲存储器中输入第二伪信号。 基于剂量检测信号，起始辐射检测器检测X射线辐射的开始。

    RADIATION IMAGE DETECTING DEVICE AND OPERATING METHOD THEREOF, AND RADIATION IMAGING SYSTEM
    5.
    发明申请
    RADIATION IMAGE DETECTING DEVICE AND OPERATING METHOD THEREOF, AND RADIATION IMAGING SYSTEM 有权
    辐射图像检测装置及其工作方法及辐射成像系统

    公开(公告)号：US20140291541A1

    公开(公告)日：2014-10-02

    申请号：US14229128

    申请日：2014-03-28

    Applicant: FUJIFILM Corporation

    Inventor： Keita WATANABE ,  Kentaro NOMA ,  Yasufumi ODA

    IPC: G01T1/16 ,  G01N23/04

    CPC classification number: G01T1/16 ,  G01N23/04 ,  G01N2223/505 ,  H04N5/32 ,  H04N5/347 ,  H04N5/3655 ,  H04N5/3658 ,  H04N5/367

    Abstract: Binning readout reads out electric charge accumulated in pixels to signal lines in blocks of a plurality of adjoining pixel-rows. A correction image generator of a line defect corrector scales up an image size of a reference frame image RP outputted by the binning readout and corrects pixel values of the reference frame image RP, to produce a correction image RPC to be used for correction of a line defect occurring in an X-ray image XP. The scale-up is performed by applying row interpolation processing to the reference frame image RP. The correction of the pixel values is performed by multiplying the reference frame image RP after being subjected to the row interpolation processing by a correction coefficient. An adder adds the correction image RPC to the X-ray image XP, and produces an X-ray image XPC in which the line defect is corrected.

    Abstract translation: 分箱读出将多个相邻像素行中的块中的以像素累积的电荷读出为信号线。 线缺陷校正器的校正图像生成器对通过合并读出输出的参考帧图像RP的图像尺寸进行放大，并校正参考帧图像RP的像素值，以产生用于校正线的校正图像RPC 在X射线图像XP中出现缺陷。 通过对参考帧图像RP应用行内插处理来执行放大。 像素值的校正是通过将进行行内插处理后的基准帧图像RP乘以校正系数来进行的。 加法器将校正图像RPC添加到X射线图像XP，并产生校正线缺陷的X射线图像XPC。

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