公开(公告)号：US08247779B2

公开(公告)日：2012-08-21

申请号：US12490926

申请日：2009-06-24

申请人： Toshio Kameshima ,  Tadao Endo ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

发明人： Toshio Kameshima ,  Tadao Endo ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

IPC分类号： G01T1/24

CPC分类号： A61B6/4233 ,  A61B6/4441 ,  H01L27/14665 ,  H04N5/325

摘要： A radiation imaging apparatus having high frame rate and picture quality by offset correction has: a sensor array having matrix-shaped pixels each including a converting element and a TFT; a driver for supplying signals to control terminals of the TFTs row by row; a reader for holding a signal in a first or second sampling/holding (S/H) circuit and outputting an image signal; and a controller for controlling the driver and reader. Until the image signal is output after irradiation of the apparatus with pulsating radiation, the TFT of a pixel is driven so as to output a first signal, the TFT of the pixel to which the first signal has been output is driven so as to output a second electric signal, and the reader outputs the image signal of the signal showing a difference between the first and second signals held in the first and second S/H circuits.

摘要翻译： 通过偏移校正具有高帧率和图像质量的放射线成像装置具有：具有矩阵形像素的传感器阵列，每个像素像素包括转换元件和TFT; 用于逐行地向TFT的控制端子提供信号的驱动器; 用于在第一或第二采样/保持（S / H）电路中保持信号并输出​​图像信号的读取器; 以及用于控制驾驶员和读取器的控制器。 直到图像信号在用脉动辐射照射设备之后输出时，像素的TFT被驱动以输出第一信号，驱动第一信号的像素的TFT被驱动以输出 第二电信号，并且读取器输出表示第一和第二S / H电路中保持的第一和第二信号之间的差的信号的图像信号。

公开(公告)号：US08232529B2

公开(公告)日：2012-07-31

申请号：US13018576

申请日：2011-02-01

申请人： Katsuro Takenaka ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Keigo Yokoyama

发明人： Katsuro Takenaka ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Keigo Yokoyama

IPC分类号： G01T1/20 ,  G01T1/208

CPC分类号： H04N5/217 ,  H04N5/32 ,  H04N5/361

摘要： An idling time period after applying a bias to a conversion element until a start of an accumulation of the conversion element for deriving an image and an accumulation period from the start of the accumulation to a termination of the accumulation are measured. An offset correction of the image is conducted by using a dark current accumulation charge quantity in the accumulation calculated based on the measured idling time period and accumulation period and stored dark current response characteristics. Thus, even just after applying the bias to the conversion element, the offset correction can be properly conducted. An imaging apparatus which can execute a good radiographing without increasing costs and a size even just after applying the bias to the conversion element is provided.

摘要翻译： 测量向转换元件施加偏压直到用于导出图像的转换元件的累积开始和从累积开始到累积结束的累积期间之间的空转时间周期。 通过使用基于测量的空闲时间周期和累加时间计算的累积中的暗电流累积电荷量和存储的暗电流响应特性来进行图像的偏移校正。 因此，即使在将偏置应用于转换元件之后，也可以适当地进行偏移校正。 提供了即使在将偏压应用于转换元件之后，也可以在不增加成本和尺寸的情况下执行良好的放射照相的成像装置。

公开(公告)号：US20120170827A1

公开(公告)日：2012-07-05

申请号：US13395634

申请日：2010-09-14

申请人： Tomoyuki Yagi ,  Tadao Endo ,  Toshio Kameshima ,  Katsuro Takenaka ,  Keigo Yokoyama ,  Sho Sato

发明人： Tomoyuki Yagi ,  Tadao Endo ,  Toshio Kameshima ,  Katsuro Takenaka ,  Keigo Yokoyama ,  Sho Sato

IPC分类号： G06K9/00

CPC分类号： H04N5/32 ,  G01T1/17 ,  H04N5/343 ,  H04N5/3454 ,  H04N5/374

摘要： An imaging apparatus includes a control unit and a detector that includes multiple pixels and that performs an image capturing operation to output image data corresponding to emitted radiation or light. The image capturing operation includes a first image capturing operation in which the detector is scanned in a first scanning area corresponding to part of the multiple pixels to output image data in the first scanning area and a second image capturing operation in which the detector is scanned in a second scanning area larger than the first scanning area to output image data in the second scanning area. The control unit causes the detector to perform an initialization operation to initialize the conversion element during a period between the first image capturing operation and the second image capturing operation in accordance with switching from the first scanning area to the second scanning area.

摘要翻译： 成像装置包括控制单元和包括多个像素的检测器，并且执行图像捕获操作以输出对应于所发射的辐射或光的图像数据。 图像拍摄操作包括第一图像拍摄操作，其中在与多个像素的一部分对应的第一扫描区域中扫描检测器，以输出第一扫描区域中的图像数据，以及第二图像捕获操作，其中检测器被扫描 大于第一扫描区域的第二扫描区域，以输出第二扫描区域中的图像数据。 根据从第一扫描区域到第二扫描区域的切换，控制单元使得检测器执行初始化操作以在第一图像捕获操作和第二图像捕获操作之间的期间初始化转换元件。

公开(公告)号：US08107588B2

公开(公告)日：2012-01-31

申请号：US12525125

申请日：2008-01-29

申请人： Toshio Kameshima ,  Tadao Endo ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

发明人： Toshio Kameshima ,  Tadao Endo ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

IPC分类号： G01N23/04 ,  H05G1/64

CPC分类号： H05G1/30 ,  G01T1/00 ,  H01L27/14676 ,  H04N5/232 ,  H04N5/32 ,  H04N5/3742 ,  H04N5/378

摘要： There is provided a radiation imaging apparatus delivering an output image with a satisfactory image quality irrespective of the dosage of the X-rays incident on the detector. The radiation imaging apparatus according to the present invention includes a detection unit for detecting as an image signal an X-ray irradiated from the an X-ray generation apparatus and penetrating through an object; a read out unit for amplifying and reading out the image signal detected by the detection unit; and a control unit for controlling at least one of the X-ray generation apparatus, the detection unit and the read out unit such that the obtained SN ratio of the image signal according to the dosage of the X-rays incident on the detector can be equal to the S/N ratio required for the image signal.

摘要翻译： 提供了一种放射成像装置，其输出具有令人满意的图像质量的输出图像，而与入射到检测器上的X射线的剂量无关。 根据本发明的放射线摄像装置包括检测单元，用于检测从X射线产生装置照射并穿透物体的X射线作为图像信号; 读出单元，用于放大和读出由检测单元检测到的图像信号; 以及控制单元，用于控制X射线产生装置，检测单元和读出单元中的至少一个，使得根据入射在检测器上的X射线的剂量，获得的图像信号的SN比可以是 等于图像信号所需的S / N比。

公开(公告)号：US07989772B2

公开(公告)日：2011-08-02

申请号：US11721281

申请日：2006-11-27

申请人： Tomoyuki Yagi ,  Tadao Endo ,  Toshio Kameshima ,  Katsuro Takenaka ,  Keigo Yokoyama

发明人： Tomoyuki Yagi ,  Tadao Endo ,  Toshio Kameshima ,  Katsuro Takenaka ,  Keigo Yokoyama

IPC分类号： G01D18/00

CPC分类号： G01T1/2018 ,  H01L27/14676 ,  H04N5/32

摘要： To provide a radiation imaging apparatus capable of restraining the change of image qualities due to the change of sensitivities of an MIS-type photoelectric conversion element and its control method. Therefore, an MIS-type photoelectric conversion element 217 is set to a saturation state before performing radiation imaging. As means for realizing the above mentioned, a light source 601, power supply 603 for making the light source 601 emit light, and switch 605 are provided. The light source 601 can use a light source capable of discharging the light having a wavelength which can be detected by a photoelectric conversion layer 209 at optional timing. For example, it is possible to use a light source in which a plurality of LEDs or cold cathode ray tubes are arranged, a light guide plate is combined with an LED or cold cathode ray tube, or an EL device.

摘要翻译： 提供能够抑制由于MIS型光电转换元件的灵敏度变化引起的图像质量变化的放射线摄像装置及其控制方法。 因此，在进行放射线成像之前，将MIS型光电转换元件217设定为饱和状态。 作为实现上述的手段，设置有用于使光源601发光的光源601，电源603以及开关605。 光源601可以使用能够以可选择的时刻放电具有可由光电转换层209检测的波长的光的光源。 例如，可以使用其中布置有多个LED或冷阴极射线管的光源，导光板与LED或冷阴极射线管或EL器件组合。

公开(公告)号：US20110128359A1

公开(公告)日：2011-06-02

申请号：US12950868

申请日：2010-11-19

申请人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Sho Sato

发明人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Sho Sato

IPC分类号： H04N7/18

CPC分类号： A61B6/00 ,  H04N5/3454 ,  H04N5/361

摘要： An imaging apparatus includes a detector including multiple pixels arranged in a matrix. The detector performs an image capturing operation whereby light or radiation incident on the pixels is converted into an image signal. The imaging apparatus also includes a bias light source and a control unit. The image capturing operation includes a first image capturing operation in which the detector is scanned in a scanning area A and a second image capturing operation in which the detector is scanned in a scanning area B larger than the scanning area A. The control unit controls the bias light source to emit bias light on the basis of a control signal indicative of an amount of integration of accumulation times in the first image capturing operation during a period between the first and second image capturing operations in accordance with switching from an irradiation field A to an irradiation field B.

摘要翻译： 一种成像装置包括一个检测器，包括以矩阵形式布置的多个像素。 检测器执行图像捕获操作，由此入射到像素上的光或辐射被转换为图像信号。 成像装置还包括偏置光源和控制单元。 图像拍摄操作包括在扫描区域A中扫描检测器的第一图像捕获操作和在大于扫描区域A的扫描区域B中扫描检测器的第二图像捕获操作。控制单元控制 基于在第一和第二图像捕获操作之间的时段期间根据从照射场A切换到第一图像捕获操作中的指示在第一图像拍摄操作中的累积时间的积分量的控制信号发射偏振光， 照射场B.

公开(公告)号：US07869568B2

公开(公告)日：2011-01-11

申请号：US12039983

申请日：2008-02-29

申请人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

发明人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

IPC分类号： H05G1/64

CPC分类号： H04N5/32 ,  A61B6/4441 ,  A61B6/4464 ,  A61B6/585 ,  H04N5/353 ,  H04N5/3597 ,  H04N5/361 ,  H04N5/3655

摘要： A radiation imaging apparatus is provided that stabilizes a dark current, image ghosting, and the sensitivity of the imaging apparatus, reduces the power consumption and the heat generation of a light source, and improves the durability of a conversion element. The radiation imaging apparatus includes a flat panel detector including a conversion unit, where the conversion unit includes a plurality of pixels arranged in a matrix and each of the pixels includes a conversion element capable of converting a radiation ray into electric charge, a light source capable of emitting light to the conversion unit, and a control unit configured to control the flat panel detector and the light source. The control unit controls the emission of light performed by the light source on the basis of a signal output from the flat panel detector.

摘要翻译： 提供了稳定暗电流，图像重影以及成像装置的灵敏度的放射线成像装置，降低了光源的功耗和发热，提高了转换元件的耐久性。 放射线摄像装置包括：平面检测器，包括转换单元，其中转换单元包括以矩阵排列的多个像素，并且每个像素包括能够将辐射线转换成电荷的转换元件， 向所述转换单元发射光;以及控制单元，被配置为控制所述平板检测器和所述光源。 控制单元基于从平板检测器输出的信号来控制由光源执行的光的发射。

公开(公告)号：US20100277592A1

公开(公告)日：2010-11-04

申请号：US12744124

申请日：2009-01-20

申请人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

发明人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

IPC分类号： H04N5/30

CPC分类号： G01T1/1647 ,  A61B6/00 ,  H01L27/14658 ,  H04N5/361 ,  H04N5/3658

摘要： A read out operation for reading out image data from a conversion circuit irradiated with a radiation, and a read out operation for reading out offset image data from the conversion circuit without irradiated with a radiation are selectively conducted, a control is conducted to repeat at a plurality of times the operation for reading out the offset image data, offset data corresponding to each pixel is extracted from one of the plurality of the offset image data to generate corrective offset image data such that offset data corresponding to all the pixels in a row of the matrix is not extracted from one of the plurality of offset image data, and the corrective offset image data is subtracted from the image data to perform an offset correction to render line noise less noticeable, for an offset correction without line noise by a simple signal processing to be provided.

摘要翻译： 选择性地进行用于从辐射照射的转换电路读出图像数据的读出操作和用于从辐射中照射而从转换电路读出偏移图像数据的读出操作，进行控制以在 多次读取偏移图像数据的操作，从多个偏移图像数据中的一个提取对应于每个像素的偏移数据，以产生校正偏移图像数据，使得与一行中的所有像素对应的偏移数据 不从多个偏移图像数据中的一个提取矩阵，并且从图像数据中减去校正偏移图像数据以进行偏移校正，以使得线噪声不显着，通过简单信号进行无线噪声的偏移校正 要提供处理。

公开(公告)号：US07786448B2

公开(公告)日：2010-08-31

申请号：US12488256

申请日：2009-06-19

申请人： Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

发明人： Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Keigo Yokoyama

IPC分类号： G01T1/24

CPC分类号： H04N5/32 ,  H04N5/3658 ,  H04N5/374 ,  H04N5/3742 ,  H04N5/378

摘要： For reducing extremely conspicuous line noise appearing in a picked up image with a simple configuration without complicating the configuration of an apparatus, an imaging apparatus a first sampling and holding circuit for sampling and holding an electric signal from pixels in one column of the detection unit and a second sampling and holding circuit for sampling and holding and electric signal from pixels in the other column of the detection unit, and a control unit for controlling such that the first and second sampling and holding circuits perform the sampling and holding in mutually different timings.

摘要翻译： 为了以简单的配置减少出现在拾取图像中的非常明显的线路噪声，而不会使设备的配置复杂化，成像设备具有用于从检测单元的一列中的像素采样和保持电信号的第一采样和保持电路，以及 用于从检测单元的另一列中的像素采样和保持电信号的第二采样和保持电路;以及控制单元，用于控制使得第一和第二采样保持电路在相互不同的定时执行采样和保持。

公开(公告)号：US20100176285A1

公开(公告)日：2010-07-15

申请号：US12748004

申请日：2010-03-26

申请人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

发明人： Keigo Yokoyama ,  Tadao Endo ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka

IPC分类号： G01D18/00 ,  G01T1/16

CPC分类号： H04N5/32 ,  H04N5/357 ,  H04N5/361 ,  H04N5/365 ,  H04N5/374 ,  H04N5/378

摘要： The invention intends to be able to perform a gain correction fully adequately. Hence, at the time of radiographing an object, a gain correction of the object image is performed based on a gain correction image (XRc1) derived by performing a light reset. On the other hand, at the time of radiographing an object, when a light reset is not performed, a gain correction of the object image is performed based on a gain correction image (XRc2) derived without performing the light reset.

摘要翻译： 本发明旨在能够充分地进行增益校正。 因此，在拍摄物体时，基于通过进行光复位导出的增益校正图像（XRc1）来执行对象图像的增益校正。 另一方面，在拍摄物体时，当不进行光复位时，基于不进行光复位而导出的增益校正图像（XRc2），进行被摄体图像的增益校正。