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公开(公告)号：US07769137B2
公开(公告)日：2010-08-03
申请号：US11577831
申请日：2005-10-25
申请人： Hanns-Ingo Maack , Waldermar Lumma
发明人： Hanns-Ingo Maack , Waldermar Lumma
IPC分类号： H05G1/38 , H05G1/08 , G01T1/02 , G01T1/24 , H01L27/146
CPC分类号： A61B6/4411 , A61B6/00 , A61B6/542
摘要： A portable X-ray detector unit includes a portable, hand-held cassette having exposure detection fields for measuring the level of radiation to which a subject to be imaged is exposed. An Automatic exposure control terminates radiation supplied to a subject when it is determined that the level of exposure exceeds a predetermined threshold as interpreted in the portable detector unit. A user-interface is provided to control the exposure detection fields and/or the automatic exposure control.
摘要翻译： 便携式X射线检测器单元包括便携式手持盒，其具有用于测量待成像对象所暴露的辐射水平的曝光检测区域。 如在便携式检测器单元中解释的，当确定曝光量超过预定阈值时，自动曝光控制终止提供给被摄体的辐射。 提供用户界面来控制曝光检测场和/或自动曝光控制。
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公开(公告)号：US20060285642A1
公开(公告)日：2006-12-21
申请号：US11435237
申请日：2006-05-16
申请人： Tomoyasu Ueda , Yoshiyasu Ito , Kazuhiko Omote
发明人： Tomoyasu Ueda , Yoshiyasu Ito , Kazuhiko Omote
IPC分类号： H05G1/38
CPC分类号： G01T1/171
摘要： The dead time of a pulse type X-ray detector is measured without estimation of a true X-ray intensity. The first and the second conditions are used for varying an intensity of an X-ray entering the X-ray detector. The first condition may be the slit width of a receiving slit, at least three kinds of slit width being selected. The second condition may be with or without an absorption plate. The first observed X-ray intensities are observed, with the absorption plate inserted, for three or more values in slit width. Next, the second observed X-ray intensities are observed similarly but with the absorption plate removed. A predetermined relational expression is made up among the first observed X-ray intensity, the second observed X-ray intensity, a ratio k of the second observed X-ray intensity to the first observed X-ray intensity (depending upon attenuation in X-ray intensity caused by the absorption plate) and the dead time τ of the X-ray detector. Based on the relational expression, a fitting operation is carried out with the least squares method so as to determine the dead time τ precisely.
摘要翻译： 在不估计真实X射线强度的情况下测量脉冲型X射线检测器的死区时间。 第一和第二条件用于改变进入X射线检测器的X射线的强度。 第一条件可以是接收狭缝的狭缝宽度，至少选择三种狭缝宽度。 第二条件可以是带或不带吸收板。 观察到第一个观察到的X射线强度，其中插入吸收板，具有三个或更多个狭缝宽度的值。 接下来，类似地观察第二观察到的X射线强度，但是除去吸收板。 在第一观察到的X射线强度，第二观察到的X射线强度，第二观察到的X射线强度的比率k与第一观察到的X射线强度（取决于X射线中的衰减） 由吸收板引起的射线强度）和X射线检测器的死区时间τ。 基于关系式，用最小二乘法进行拟合，精确地确定死区时间τ。
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公开(公告)号：US4628355A
公开(公告)日：1986-12-09
申请号：US527553
申请日：1983-08-29
申请人： Ichiro Ogura , Motomu Suzuki , Senzo Fujii , Michitaka Honda
发明人： Ichiro Ogura , Motomu Suzuki , Senzo Fujii , Michitaka Honda
摘要： A diagnostic X-ray apparatus emitting pulsed X-ray radiation includes a processor for performing digital X-ray subtraction of a previous mask image from current images. The apparatus includes circuitry for digitization of the video signals from an image intensifier-TV chain, digital subtraction to obtain digital difference signals, and subsequent reconversion of the resultant digital difference video signals to analog signals. Pulsed X-ray exposures are performed during the blanking periods of the TV camera following which the television fields immediately following the pulsed X-ray exposure are scanned and read out, and are supplied to the processor for performing the digital X-ray subtraction.
摘要翻译： 发射脉冲X射线辐射的诊断X射线装置包括用于从当前图像执行先前掩模图像的数字X射线相减的处理器。 该装置包括用于从图像增强器-TV链数字化视频信号的电路，数字减法以获得数字差分信号，以及随后将所得到的数字差分视频信号重新转换为模拟信号。 在电视摄像机的消隐期间执行脉冲X射线曝光，随后扫描并读出紧接在脉冲X射线曝光之后的电视场，并将其提供给处理器进行数字X射线减法。
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公开(公告)号：US4210812A
公开(公告)日：1980-07-01
申请号：US25466
申请日：1979-03-30
申请人： Shoichi Ando , Kiminobu Inaba , Tomoaki Yoshida
发明人： Shoichi Ando , Kiminobu Inaba , Tomoaki Yoshida
摘要： An X-ray imaging diagnostic apparatus emitting a low X-ray radiation dose is disclosed as comprising an X-ray generating source for exposing an object, an optical system having a fluorescent screen for receiving the X-ray image at an aperture portion thereof, a high sensitivity imaging device coupled directly to the optical system and receiving an X-ray image from the fluorescent screen for radiographing the X-ray image, a control unit for amplifying the output from the high sensitivity imaging device and for controlling the exposure time of X-ray radiation emitted from the X-ray generating source, an image storing memory circuit connected to the control unit for storing an image signal therefrom and a monitor circuit for displaying the image signal. The exposure time of the X-ray generating source is controlled to be at most less than 1/100 second by the control unit and the image of an object obtained on the fluorescent screen is imaged with a high resolution and a high sensitivity so that the resultant image can be recorded and monitored. The exposure time of the X-ray radiation is decreased as low as possible by using the high sensitivity imaging device, so that an X-ray radiation dose applied to a human body is lowered as compared to conventional X-ray diagnostic apparatus.
摘要翻译： 公开了一种发射低X射线辐射剂量的X射线成像诊断装置，包括用于暴露物体的X射线产生源，具有用于在其开口部分处接收X射线图像的荧光屏的光学系统， 高灵敏度成像装置，其直接耦合到光学系统并从荧光屏接收X射线图像，用于X射线图像的X射线照相;控制单元，用于放大来自高灵敏度成像装置的输出并控制曝光时间 从X射线发生源发射的X射线辐射，连接到控制单元的图像存储电路，用于存储图像信号，以及监视电路，用于显示图像信号。 通过控制单元将X射线产生源的曝光时间控制在至少小于1/100秒，并且以高分辨率和高灵敏度成像在荧光屏上获得的物体的图像， 可以记录和监视所得到的图像。 通过使用高灵敏度成像装置，X射线辐射的曝光时间尽可能地降低，因此与常规X射线诊断装置相比，施加于人体的X射线辐射剂量降低。
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公开(公告)号：US4039811A
公开(公告)日：1977-08-02
申请号：US635068
申请日：1975-11-25
摘要： A power supply and timing circuit for an X-ray tube capable of maintaining constant X-ray exposure values and stable peak plate voltage despite relatively large variations in the voltage of the source from which the power supply is fed. The cathode-to-plate current in the X-ray tube is varied responsively to changes in the voltage of the source, thereby varying the load on the high voltage transformer and holding its output voltage at a constant value despite changes in the source voltage. Changes in the cathode-to-plate current may be compensated for by the use of a milliampere-second integrator to time the exposure.
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公开(公告)号：US2217939A
公开(公告)日：1940-10-15
申请号：US16769637
申请日：1937-10-07
发明人： KURT BISCHOFF , KARL SILBERMANN
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公开(公告)号：US2207280A
公开(公告)日：1940-07-09
申请号：US18848938
申请日：1938-02-03
申请人： CONTINENTAL OIL CO
发明人： ATHY LAWRENCE F , PRESCOTT HAROLD R
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公开(公告)号：US12121390B2
公开(公告)日：2024-10-22
申请号：US17815568
申请日：2022-07-27
申请人： Konica Minolta, Inc.
发明人： Kohei Isogai , Hidetake Tezuka , Nobuyuki Miyake , Kentaro Hara , Masahiro Kuwata , Koji Kashima
摘要： A control system includes a radiation emission apparatus and a radiographic imaging apparatus that generates image data by receiving radiation. A first apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a first timer that performs time measurement to periodically generate first time measurement information. A second apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a second timer that performs time measurement to periodically generate second time measurement information. The first apparatus includes an interface that transmits the first time measurement information to the second timer. At least one apparatus includes a hardware processor which adjusts the operation of the first or second timer based on adjustment conditions in a state where the second timer does not acquire the first time measurement information.
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公开(公告)号：US20220370030A1
公开(公告)日：2022-11-24
申请号：US17815568
申请日：2022-07-27
申请人： Konica Minolta, Inc.
发明人： Kohei ISOGAI , Hidetake TEZUKA , Nobuyuki MIYAKE , Kentaro HARA , Masahiro KUWATA , Koji KASHIMA
摘要： A control system includes a radiation emission apparatus and a radiographic imaging apparatus that generates image data by receiving radiation. A first apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a first timer that performs time measurement to periodically generate first time measurement information. A second apparatus of the radiation emission apparatus and the radiographic imaging apparatus includes a second timer that performs time measurement to periodically generate second time measurement information. The first apparatus includes an interface that transmits the first time measurement information to the second timer. At least one apparatus includes a hardware processor which adjusts the operation of the first or second timer based on adjustment conditions in a state where the second timer does not acquire the first time measurement information.
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公开(公告)号：US10757796B2
公开(公告)日：2020-08-25
申请号：US16658290
申请日：2019-10-21
发明人： Xi Zhang , Patrick Kling , Yun Zou , Alexander Zamyatin
IPC分类号： H01J35/00 , H05G1/52 , H01J35/30 , H01J35/14 , H04N5/32 , H05G1/38 , H01J35/10 , H05G1/04 , H05G1/70
摘要： A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.
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