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    Radiation imaging apparatus, control method thereof and radiation imaging system
    1.
    发明授权
    Radiation imaging apparatus, control method thereof and radiation imaging system 有权

    公开(公告)号：US10551721B2

    公开(公告)日：2020-02-04

    申请号：US15561122

    申请日：2016-05-27

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Eriko Sato ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Hideyuki Okada ,  Takuya Ryu

    IPC: G03B7/08 ,  G03B42/02 ,  A61B6/00 ,  G01T1/17 ,  H04N5/32

    Abstract: A radiation imaging apparatus that includes a plurality of sensors, a readout unit and a control unit, wherein the control unit performs a first control of reading out signals from sensors after radiation irradiation is started, and a second control of outputting a control signal to end the radiation irradiation when a calculated value calculated based on an output of the readout unit in the first control reaches a reference value, and the control unit, in the first control, reads out the signals from the sensors by changing a signal amplification ratio of the readout unit such that a value of an output of the readout unit is not saturated, and, in the second control, calculates the calculated value by accumulating the output of the readout unit in consideration of the signal amplification ratio.

    RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND EXPOSURE CONTROL METHOD
    4.
    发明申请
    RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND EXPOSURE CONTROL METHOD 审中-公开

    公开(公告)号：US20180063933A1

    公开(公告)日：2018-03-01

    申请号：US15560212

    申请日：2016-05-23

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hideyuki Okada ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Eriko Sato ,  Takuya Ryu

    IPC: H05G1/38 ,  G01N23/04 ,  G01T1/17

    CPC classification number: H05G1/38 ,  G01N23/04 ,  G01T1/17 ,  H04N5/32

    Abstract: A radiation imaging apparatus includes a pixel array including pixels for detecting radiation and column signal lines, a detector for detecting signals that appear in the column signal lines, and a controller. Each pixel includes a conversion element for converting radiation into an electrical signal and a switch for connecting the conversion element and a column signal line. In a state in which the switches of the pixels irradiated with radiation are open, the detector detects, as a radiation signal, a signal appearing in at least one column signal line. The controller converts an integrated value of the radiation signal into an integrated irradiation amount of radiation. The controller determines, based on the radiation signal and a signal read out by the detector from at least one pixel in a state in which the switch of the at least one pixel of the pixels is closed, a conversion coefficient to convert the integrated value into the integrated irradiation amount.

    RADIATION IMAGING APPARATUS AND CONTROL METHOD THEREOF
    7.
    发明申请
    RADIATION IMAGING APPARATUS AND CONTROL METHOD THEREOF 有权
    辐射成像装置及其控制方法

    公开(公告)号：US20160377737A1

    公开(公告)日：2016-12-29

    申请号：US15186862

    申请日：2016-06-20

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hideyuki Okada ,  Toshio Kameshima ,  Eriko Sato

    IPC: G01T1/17 ,  G01N23/04

    CPC classification number: G01T1/17 ,  H04N5/32

    Abstract: A radiation imaging apparatus that includes a plurality of sensors and a control unit, wherein the control unit performs a first control of monitoring, after a radiation irradiation is started, a signal of a first sensor and accumulating the monitored signal of the first sensor, a second control of outputting, in response to a calculated value obtained by the accumulation and reaching a target value, a control signal to end the radiation irradiation, and a third control of reading out, after the radiation irradiation is ended, the signals of the respective plurality of sensors, and the control unit changes a monitoring cycle of the first control based on the target value and an elapsed time since the radiation irradiation has been started.

    Abstract translation: 一种包括多个传感器和控制单元的放射线成像设备，其中，所述控制单元执行第一控制，所述控制单元在辐射照射开始之后执行第一传感器的信号并且累积所述第一传感器的监视信号的第一控制， 响应于通过累积获得的计算值并达到目标值的第二控制，输出用于结束辐射照射的控制信号，以及在辐射照射结束之后读出第三控制信号， 多个传感器，并且控制单元基于目标值和从辐射照射开始起经过的时间改变第一控制的监视周期。

    Radiographic image capturing apparatus and control method thereof
    8.
    发明授权
    Radiographic image capturing apparatus and control method thereof 有权
    射线照相图像摄影装置及其控制方法

    公开(公告)号：US09470802B2

    公开(公告)日：2016-10-18

    申请号：US14714600

    申请日：2015-05-18

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hideyuki Okada ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Atsushi Iwashita ,  Eriko Sato ,  Takuya Ryu ,  Kosuke Terui

    IPC: G01T1/208 ,  H04N5/361

    CPC classification number: G01T1/208 ,  H04N5/361

    Abstract: A radiographic image capturing apparatus, comprising a plurality of sensors arrayed on a substrate, a driving unit, a detection unit and a control unit, wherein the control unit is configured to perform a first control controlling the driving unit so as to repeatedly initialize the plurality of sensors on a row-by-row basis before a start of emission of radiation, and a second control controlling the driving unit so as to interrupt the initialization in response to a detection signal from the detection unit and cause the plurality of sensors to output signals, and the apparatus further comprises a determination unit configured to determine whether or not the detection signal is a signal which was output in response to the start of emission of radiation.

    Abstract translation: 一种放射线照相图像拍摄装置，包括排列在基板上的多个传感器，驱动单元，检测单元和控制单元，其中，所述控制单元被配置为执行控制所述驱动单元的第一控制，以便重复地初始化所述多个 在发射辐射开始之前以行为单位的传感器，以及控制驱动单元的第二控制，以便响应于来自检测单元的检测信号中断初始化，并且使多个传感器输出 信号，并且该装置还包括确定单元，其被配置为确定检测信号是否是响应于辐射的开始而被输出的信号。

    Imaging system
    9.
    发明授权
    Imaging system 有权
    成像系统

    公开(公告)号：US09468414B2

    公开(公告)日：2016-10-18

    申请号：US14211970

    申请日：2014-03-14

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Takuya Ryu ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Sho Sato ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada

    IPC: A61B6/00 ,  G01T7/00 ,  G06T5/50 ,  H04N5/32 ,  H04N5/357 ,  G06T5/00 ,  H04N5/325 ,  H04N5/347 ,  H04N5/378 ,  G01T1/20 ,  H04N5/217

    CPC classification number: A61B6/5258 ,  A61B6/42 ,  A61B6/52 ,  A61B6/5205 ,  A61B6/585 ,  G01T1/2018 ,  G01T7/005 ,  G06T5/002 ,  G06T5/50 ,  H04N5/2173 ,  H04N5/32 ,  H04N5/3205 ,  H04N5/325 ,  H04N5/347 ,  H04N5/357 ,  H04N5/378

    Abstract: An imaging system comprises: a plurality of pixels each for converting light, converted from radiation by a conversion unit, into an electrical signal; an extracting unit that extracts, based on an image formed based on output signals from the pixels, a pixel with noise generated by the radiation that has transmitted through the conversion unit to arrive at the pixels; and a correcting unit that performs correction to remove the noise with respect to an output signal from the extracted pixel, wherein the extracting unit extracts the pixel with the noise by performing division between first and second images, the first image being formed based on the output signals from the pixels in accordance with the radiation to the conversion unit during a first period, the second image being formed based on these output signals in accordance with that radiation during a second period after the first period.

    Abstract translation: 成像系统包括：多个像素，每个像素用于将由转换单元的辐射转换的光转换成电信号; 提取单元，其基于基于来自所述像素的输出信号形成的图像提取具有通过所述转换单元发送的辐射产生的噪声以获得所述像素的像素; 以及校正单元，执行相对于来自所提取的像素的输出信号去除噪声的校正，其中提取单元通过执行第一和第二图像之间的划分来提取具有噪声的像素，基于输出形成第一图像 在第一时段期间根据辐射对所述转换单元的像素的信号，所述第二图像基于在所述第一周期之后的第二周期期间根据所述辐射的这些输出信号形成。

    Radiation image capturing apparatus and method of driving the same
    10.
    发明授权
    Radiation image capturing apparatus and method of driving the same 有权
    辐射摄影装置及其驱动方法

    公开(公告)号：US09445030B2

    公开(公告)日：2016-09-13

    申请号：US14801549

    申请日：2015-07-16

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Tomoyuki Yagi ,  Toshio Kameshima ,  Katsuro Takenaka ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Takuya Ryu ,  Kosuke Terui

    IPC: G01J1/42 ,  H04N5/378 ,  H04N5/33

    CPC classification number: H04N5/378 ,  H04N5/33

    Abstract: A radiation image capturing apparatus, comprising a sensor configured to monitor an irradiating dose of radiation, a switch configured output a sensor signal from the sensor, a readout unit configured to read out the sensor signal via a signal line, and a controlling unit, wherein the controlling unit performs first control of repeatedly performing, while the sensor is irradiated, a series of operations including a first operation of setting the switch to a conductive state and a second operation of setting the switch to a non-conductive state, second control of reading out the sensor signal in the first operation as a first signal and a potential of the signal line in the second operation as a second signal, and third control of calculating the irradiating dose of radiation based on the first signal and the second signal.

    Abstract translation: 一种放射线图像捕获装置，包括被配置为监测辐射照射剂量的传感器，配置为从传感器输出传感器信号的开关，经配置以经由信号线读出传感器信号的读出单元和控制单元，其中 控制单元执行在传感器被照射时重复执行包括将开关设置为导通状态的第一操作和将开关设置为非导通状态的第二操作的一系列操作的第一控制，第二控制 在第一操作中将传感器信号作为第一信号和第二操作中的信号线的电位读出为第二信号，以及基于第一信号和第二信号计算辐射照射剂量的第三控制。

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