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公开(公告)号：US20060050838A1
公开(公告)日：2006-03-09
申请号：US11214503
申请日：2005-08-30
申请人： Akira Hagiwara , Makoto Gohno , Mitsuru Yahata
发明人： Akira Hagiwara , Makoto Gohno , Mitsuru Yahata
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/421
摘要： A CT image reconstruction method includes substituting other projection data, which has a predetermined positional relationship to projection data that is found defective during scanning, for the defective data, and interpolating back projection data using a value and information on a scanned position that are contained in the substitute data.
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公开(公告)号：US20050195935A1
公开(公告)日：2005-09-08
申请号：US11069850
申请日：2005-03-01
申请人： Mitsuru Yahata
发明人： Mitsuru Yahata
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4014 , A61B6/4028 , A61B6/4085
摘要： The present invention comprises: an X-ray generator that generates two cone beam X-radiations which pass through two successive slabs; an X-ray detector that detects a two-dimensional distribution of intensities exhibited by the two cone beam X-radiations having passed through the two slabs; an acquisition unit that acquires a plurality of view of projection data representing the two slabs on the basis of detection signals sent from the X-ray detector; and a reconstruction unit that reconstructs an image according to the projection data.
摘要翻译： 本发明包括：X射线发生器，其生成通过两个连续平板的两个锥形束X射线; X射线检测器，其检测通过两个板坯的两个锥形束X射线显示的强度的二维分布; 获取单元，其基于从所述X射线检测器发送的检测信号获取表示所述两个平板的投影数据的多个视图; 以及根据投影数据重建图像的重建单元。
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公开(公告)号：US5034970A
公开(公告)日：1991-07-23
申请号：US451008
申请日：1989-12-15
申请人： Mitsuru Yahata , Hidehiro Fujita
发明人： Mitsuru Yahata , Hidehiro Fujita
CPC分类号： A61B6/035 , A61B6/0457
摘要： A frame structure for a CT scanner, in which a dome for containing a scanner for an object or subject to be examined has an imaging space in its central portion, and a bed plate support mechanism carries the subject, and in which a bed plate slidably drive mechanism moves the bed plate into or out of the imaging space of the dome, and the bed plate support mechanism and the bed plate slidably drive mechanism are integrally provided to the dome.
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公开(公告)号：US4783795A
公开(公告)日：1988-11-08
申请号：US7482
申请日：1987-01-28
申请人： Mitsuru Yahata
发明人： Mitsuru Yahata
摘要： An X-ray generator system has first and second switching devices such as transistors which are complementarily turned on and off to intermittently apply a DC voltage to the primary winding of a transformer for thereby inducing a high voltage across secondary windings of the transformer for enabling an X-ray tube to emit X-rays. The X-ray generator has a control mode in which the first and second switching devices are simultaneously turned on immediately before they start being complementarily turned on and off, for allowing the high voltage to have a sharply rising positive-going edge.
摘要翻译： X射线发生器系统具有第一和第二开关器件，例如互补地导通和截止的晶体管，以间断地向变压器的初级绕组施加DC电压，从而在变压器的次级绕组上产生高电压， X射线管发射X射线。 X射线发生器具有控制模式，其中第一和第二开关装置在它们开始被互补打开和关闭之前立即同时导通，以允许高电压具有急剧上升的正向沿。
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公开(公告)号：US4200795A
公开(公告)日：1980-04-29
申请号：US906683
申请日：1978-05-16
申请人： Kazumitu Kawamura , Mitsuru Yahata
发明人： Kazumitu Kawamura , Mitsuru Yahata
摘要： A capacitor connected between the anode and cathode of an X-ray tube through an X-ray switch is charged by a DC output voltage including ripple component from a rectifier connected to the secondary of a high-tension transformer. The primary of the high-tension transformer is connected to a switching circuit. A switching control circuit produces a turn-on signal for the switching circuit when a pulse signal derived from a phase detector in synchronism with a given phase of the ripple component, an X-ray exposure instruction signal and a charge instruction signal formed in a comparator are logically processed, and a turn-off signal when the charge voltage of the capacitor reaches a given value. The switching circuit is ON-OFF controlled by the switching control circuit.
摘要翻译： 通过X射线开关连接在X射线管的阳极和阴极之间的电容器通过包括连接到高压变压器的次级的整流器的纹波分量的直流输出电压来充电。 高压变压器的主要连接到开关电路。 当从相位检测器得到的脉冲信号与纹波分量的给定相位同步，X射线曝光指令信号和在比较器中形成的充电指令信号时，开关控制电路产生开关电路的导通信号 逻辑处理，当电容器的充电电压达到给定值时关断信号。 开关电路由开关控制电路控制。
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公开(公告)号：US07203268B2
公开(公告)日：2007-04-10
申请号：US11069850
申请日：2005-03-01
申请人： Mitsuru Yahata
发明人： Mitsuru Yahata
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4014 , A61B6/4028 , A61B6/4085
摘要： An X-ray CT system comprises: an X-ray generator that generates two cone beam X-radiations which pass through two successive slabs; an X-ray detector that detects a two-dimensional distribution of intensities exhibited by the two cone beam X-radiations having passed through the two slabs; an acquisition unit that acquires a plurality of view of projection data representing the two slabs on the basis of detection signals sent from the X-ray detector; and a reconstruction unit that reconstructs an image according to the projection data.
摘要翻译： X射线CT系统包括：X射线发生器，其产生通过两个连续板坯的两个锥形束X射线; X射线检测器，其检测通过两个板坯的两个锥形束X射线显示的强度的二维分布; 获取单元，其基于从所述X射线检测器发送的检测信号获取表示所述两个平板的投影数据的多个视图; 以及根据投影数据重建图像的重建单元。
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7.发明授权X-ray distribution adjusting filter apparatus and X-ray CT apparatus using the same 失效X射线分布调整过滤装置和使用其的X射线CT装置公开(公告)号：US07082189B2
公开(公告)日：2006-07-25
申请号：US10891979
申请日：2004-07-14
申请人： Mitsuru Yahata , Akira Izuhara , Masashi Maida
发明人： Mitsuru Yahata , Akira Izuhara , Masashi Maida
IPC分类号： G21K3/00
摘要： An X-ray distribution adjusting filter apparatus for supplying a desired X-ray intensity distribution or adjusting the X-ray distribution to a desired profile, the bowtie filter as the X-ray distribution adjusting filter apparatus has a fixed section having a base portion and inclined portions, first and second movable sections configured to be tiltable pivoting on a center point, and first and second deformable sections whose cavities defined by the fixed section, the movable sections and an expansible bellows is to be filled with fluid, wherein the inclined faces of the fixed section and the flat faces of the movable sections are caused to approach or move away from each other by the tilting of the movable sections pivoting on the center point to vary the quantity of the fluid in the cavities of the movable sections, and to vary the sectional shape of the X-ray absorbing portion of the bowtie filter.
摘要翻译： 一种用于将所需X射线强度分布或将X射线分布调整为所需轮廓的X射线分布调节滤波器装置，作为X射线分布调节滤光器装置的弓形滤波器具有固定部分，该固定部分具有基部和 倾斜部分，被构造成在中心点可倾斜地枢转的第一和第二可移动部分，以及由固定部分，可动部分和可膨胀波纹管限定的空腔中的第一和第二可变形部分填充流体，其中倾斜面 通过在中心点枢转的可动部分的倾斜使可动部分的平面彼此接近或移开，以改变可移动部分的空腔中的流体的量，以及 以改变弓形过滤器的X射线吸收部分的截面形状。
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公开(公告)号：US20060002508A1
公开(公告)日：2006-01-05
申请号：US11169373
申请日：2005-06-29
申请人： Mitsuru Yahata
发明人： Mitsuru Yahata
CPC分类号： G01T1/2985 , A61B6/032 , A61B6/4021 , A61B6/5205
摘要： An X-ray CT apparatus that includes a multidetector wherein a scintillator unfractionated by reflectors or slits or the like is laminated on an upper surface of a photodiode array comprising photodiodes two-dimensionally arranged in channel and slice directions, a DAS which acquires signals delivered from the photodiodes, and a signal transfer section which switches whether to transfer the signals sent from the respective ones of the photodiodes to the DAS or to add the signals sent from the 2×2 photodiodes of the photodiodes and transfer the result of addition to the DAS.
摘要翻译： 一种X射线CT装置，其包括多重检测器，其中通过反射器或狭缝等进行分级的闪烁体层叠在包括以通道和切片方向二维布置的光电二极管的光电二极管阵列的上表面上，DAS从 光电二极管和信号传递部分，其切换是否将从各个光电二极管发送的信号传送到DAS，或者添加从光电二极管的2x2光电二极管发送的信号，并将添加结果传送到DAS。
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9.发明申请X-ray distribution adjusting filter appartus and X-ray CT apparatus using the same 失效X射线分布调整过滤器和X射线CT装置使用相同公开(公告)号：US20050013411A1
公开(公告)日：2005-01-20
申请号：US10891979
申请日：2004-07-14
申请人： Mitsuru Yahata , Akira Izuhara , Masashi Maida
发明人： Mitsuru Yahata , Akira Izuhara , Masashi Maida
摘要： An X-ray distribution adjusting filter apparatus for supplying a desired X-ray intensity distribution or adjusting the X-ray distribution to a desired profile, the bowtie filter as the X-ray distribution adjusting filter apparatus has a fixed section having a base portion and inclined portions, first and second movable sections configured to be tiltable pivoting on a center point, and first and second deformable sections whose cavities defined by the fixed section, the movable sections and an expansible bellows is to be filled with fluid, wherein the inclined faces of the fixed section and the flat faces of the movable sections are caused to approach or move away from each other by the tilting of the movable sections pivoting on the center point to vary the quantity of the fluid in the cavities of the movable sections, and to vary the sectional shape of the X-ray absorbing portion of the bowtie filter.
摘要翻译： 一种用于将所需X射线强度分布或将X射线分布调整为所需轮廓的X射线分布调节滤波器装置，作为X射线分布调节滤光器装置的弓形滤波器具有固定部分，该固定部分具有基部和 倾斜部分，被构造成在中心点可倾斜地枢转的第一和第二可移动部分，以及由固定部分，可动部分和可膨胀波纹管限定的空腔中的第一和第二可变形部分填充流体，其中倾斜面 通过在中心点枢转的可动部分的倾斜使可动部分的平面彼此接近或移开，以改变可移动部分的空腔中的流体的量，以及 以改变弓形过滤器的X射线吸收部分的截面形状。
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公开(公告)号：US5025463A
公开(公告)日：1991-06-18
申请号：US540601
申请日：1990-06-20
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , Y10S378/901
摘要： A fourth-generation X-ray CT scanner device comprises an X-ray tube for irradiating X-rays in a sector form to an object while moving on a circular orbit around the object, an annular X-ray detector array disposed coaxially with and inside the circular orbit of the X-ray tube and arranged to surround the object, for detecting the X-rays which have been irradiated from the X-ray tube and passed through the object for each channel, and a reconstruction unit for acquiring an output of the detector array to effect the reconstruction process and create a tomographic image. The X-ray array is formed of a large number of solid-state X-ray detectors and a plurality of the detectors constitute a detector module, and the array includes a large number of modules. In a displayed tomographic image, in a case where linear artifacts radiated from one point in various directions are detected, a detector module lying on an intersection (radiation point) of the artifact lines is determined as a defective detector module, and a reconstruction image is created without using output data of the defective detector module.
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