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公开(公告)号：US5031625A
公开(公告)日：1991-07-16
申请号：US555487
申请日：1990-07-30
CPC分类号： G10K11/346
摘要： A received ultrasonic phase matching circuit of the present invention, which utilizes variable delay lines having short delay times as the structural element of variable focus means having a larger aperture and realizes focusing to the regions from the region near the surface of object and to the deeper region thereof, comprises variable attenuators to be controlled individually and variable delay lines having the equal maximum delay times also to be controlled individually to the respective receiving channels forming the maximum aperture for reception of the ultrasonic echoes to form variable aperture by controlling variable attenuators and distribution of delay times for focusing in the aperture using only the variable delay times belonging to such aperture and add and combine the receiving signals delayed by the variable delay lines in the beam steering means.
摘要翻译： PCT No.PCT / JP89 / 00095 Sec。 371日期1990年7月30日 102（e）日1990年7月30日PCT 1989年1月30日PCT PCT。 出版物WO89 / 06933 日本1989年8月10日。本发明的接收超声波相位匹配电路，其利用具有较短延迟时间的可变延迟线作为具有较大孔径的可变焦点装置的结构元件，并实现对来自接近 物体表面和其较深的区域包括可单独控制的可变衰减器和具有相等的最大延迟时间的可变延迟线也被单独地控制到形成用于接收超声回波的最大孔径的各个接收通道以形成变量 通过控制可变衰减器的光圈和用于聚焦在光圈中的延迟时间的分布，仅使用属于这种孔径的可变延迟时间，并且将波长转向装置中延迟了可变延迟线的接收信号相加并组合。
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公开(公告)号：US20070140408A1
公开(公告)日：2007-06-21
申请号：US11564628
申请日：2006-11-29
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , G01N2223/419 , G01N2223/612
摘要： Enhancement of the resolution of tomograms obtained by conventional scanning (axial scanning), cine-scanning, helical scanning or variable-pitch helical scanning by the X-ray CT apparatus using a multi-row X-ray detector or a two-dimensional X-ray area detector of a matrix structure is to be realized by a simple method. An X-ray CT apparatus is realized in which a multi-row X-ray detector or a two-dimensional X-ray area detector of a matrix structure with a small amount of processing work, and image reconstructing device capable of providing high-resolution tomograms by image reconstruction is provided.
摘要翻译： 通过使用多行X射线检测器或二维X射线检测器的X射线CT装置的常规扫描（轴向扫描），电影扫描，螺旋扫描或可变螺距扫描获得的断层图像的分辨率的增强， 通过简单的方法实现矩阵结构的射线区域检测器。 实现了一种X射线CT装置，其中具有少量处理功能的矩阵结构的多行X射线检测器或二维X射线区域检测器，以及能够提供高分辨率的图像重建装置 提供了通过图像重建的断层图像。
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3.发明授权Computer tomography system wherein preprocessing, convolution and back projection computations are performed prior to external data storage 失效计算机断层摄影系统，其中在外部数据存储之前执行预处理，卷积和反投影计算
公开(公告)号：US4654797A
公开(公告)日：1987-03-31
申请号：US588502
申请日：1984-03-12
申请人： Kenjiro Fujita , Yasuro Takiura
发明人： Kenjiro Fujita , Yasuro Takiura
CPC分类号： G06T11/006 , G06T2211/428 , Y10S378/901
摘要： A radiation CT system packs projection data and reads the data in a DMA mode, and separates the packed data into individual data items through format conversion when the data are to be processed. The system has a memory for storing raw projection data and processed image data for one full image. With this arrangement, a high speed processing program for image reconstruction can be executed exclusively for image reconstruction immediately after scanning operation has started. During image reconstruction processing, no data transfer to and from an external memory is performed, thereby to reduce the period of time required for image reconstruction after data have been collected.
摘要翻译： 辐射CT系统包装投影数据并以DMA模式读取数据，并且当数据要被处理时，通过格式转换将压缩数据分离成各个数据项。 该系统具有用于存储一个完整图像的原始投影数据和处理的图像数据的存储器。 利用这种布置，用于图像重建的高速处理程序可以专门用于扫描操作开始之后立即进行图像重建。 在图像重建处理期间，不执行到外部存储器的数据传送，从而减少了在收集数据之后图像重建所需的时间段。
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公开(公告)号：US20070153972A1
公开(公告)日：2007-07-05
申请号：US11561433
申请日：2006-11-20
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , G01N2223/419 , G01N2223/612 , G06T11/006
摘要： The present invention aims to optimize image quality for a conventional scan (axial scan) or a cine scan or a helical scan of an X-ray CT apparatus by a data acquisition system having a limited number of channels. The optimum view numbers determined or defined by image quality to be determined depending upon the positions of the respective channels at image reconstruction are determined by a sampling theorem. Thus, the optimum view numbers, which depend upon the respective channel positions, are allocated. The data acquisition system performs data acquisition in accordance with the views to make it possible to obtain a tomographic image having the optimum image quality. Thus, the number of A/D converters of the data acquisition system and its performance can also be optimized.
摘要翻译： 本发明旨在通过具有有限数量的通道的数据采集系统优化用于X射线CT装置的常规扫描（轴向扫描）或电影扫描或电影扫描或螺旋扫描的图像质量。 通过采样定理确定根据图像重构时的各个通道的位置而确定的图像质量确定或定义的最佳视图数。 因此，分配依赖于各个通道位置的最佳视图数。 数据采集系统根据视图执行数据采集，使得可以获得具有最佳图像质量的断层图像。 因此，数据采集系统的A / D转换器数量及其性能也可以优化。
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公开(公告)号：US4941094A
公开(公告)日：1990-07-10
申请号：US274997
申请日：1988-10-12
申请人： Yusuke Satta , Yasuro Takiura
发明人： Yusuke Satta , Yasuro Takiura
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/428 , Y10S378/901
摘要： An image reconstruction data processing unit of a simple structure which is capable of fast data processing by parallel operations of a plurality of fast processing units (FPU) is provided.The image reconstruction data processing unit according to the present invention comprises a plurality of FPUs and a single back projection unit (BPU) connected to the formers and is characterized in that the BPU includes a plurality of back projection execution parts corresponding to the FPUs, respectively, and a single pixel memory in which a total sum of output data from the back projection execution parts are stored in a back-projected state.
摘要翻译： PCT No.PCT / JP88 / 00169 Sec。 371日期：1988年10月12日 102（e）日期1988年10月12日PCT提交1988年2月19日PCT公布。 第WO88 / 06321号公报 日期1988年8月25日。提供一种能够通过多个快速处理单元（FPU）的并行操作进行快速数据处理的简单结构的图像重建数据处理单元。 根据本发明的图像重建数据处理单元包括连接到成形器的多个FPU和单个背投影单元（BPU），其特征在于BPU分别包括对应于FPU的多个反投影执行部分 以及其中来自后投影执行部分的输出数据的总和以后投影状态存储的单个像素存储器。
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公开(公告)号：US5873826A
公开(公告)日：1999-02-23
申请号：US893652
申请日：1997-07-11
申请人： Makoto Gono , Yasuro Takiura
发明人： Makoto Gono , Yasuro Takiura
摘要： To make it possible to decrease an X-ray exposure on an operator and to obtain an image of high quality upon fluoroscopy operation an X-ray tube is rotated to acquire data, an X-ray radiation dose is set to "0" in a predetermined angular range including an angle at which the alignment of the X-ray tube with the operator's hand is brought about, and the X-ray radiation dose is set to an ordinary one at an angle in a range other than that angular range. The predetermined angular range is established using a light beam which enables to see what part of the field has no X-ray radiation exposure, thereby increasing his safety.
摘要翻译： 为了能够减少操作者的X射线曝光并且在荧光透视操作时获得高质量的图像，旋转X射线管以获取数据，将X射线辐射剂量设置为“0” 预定的角度范围包括使X射线管与操作者的手对准的角度，并且将X射线辐射剂量设置为普通角度在除该角度范围以外的范围内的角度。 使用能够看到场的哪些部分没有X射线辐射暴露的光束来建立预定的角度范围，从而增加了他的安全性。
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公开(公告)号：US5204943A
公开(公告)日：1993-04-20
申请号：US581148
申请日：1990-09-10
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/428
摘要： An image forming apparatus is capable of starting image reconstruction simultaneously with the start of scan. A pipe-line system image forming apparatus having an intermediate buffer between a date acquition device and an image reconstruction device, and the apparatus is characterized in that there is provided a path for supplying data from the data acquisition device directly to the image reconstruction device, whereby the first scan data is sent also to the image reconstruction device simultaneously with sending data to the intermediate buffer so as to immediately start image reconstruction according to the scan data.
摘要翻译： 图像形成装置能够与扫描开始同时开始图像重建。 一种在日期取得装置和图像重建装置之间具有中间缓冲器的管线系统图像形成装置及其装置，其特征在于，提供用于将数据从数据采集装置直接提供给图像重建装置的路径， 由此第一扫描数据也被发送到图像重建装置，同时向中间缓冲器发送数据，以便根据扫描数据立即开始图像重建。
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公开(公告)号：US3959772A
公开(公告)日：1976-05-25
申请号：US587619
申请日：1975-06-17
申请人： Yutaka Wakasa , Hisayuki Uchiike , Koju Kataoka , Yasuro Takiura
发明人： Yutaka Wakasa , Hisayuki Uchiike , Koju Kataoka , Yasuro Takiura
CPC分类号： G08C19/22
摘要： A signal transmission system of the type used in process control systems for conveying a signal between a field telemetering instrument and a central controller, or between a central controller and a process control device. The signal transmission system is arranged with a transmitter accepting an input signal, a transmission line for carrying a transmission signal, and a receiver receiving the transmission signal and developing an output signal.In accordance with the invention, converter means in the transmitter develop a pulse width signal with a duration corresponding in a predetermined manner to the value of the input signal, and means in the transmitter provide the transmission signal (e.g., a current signal) with two states (e.g., opposite polarities), one of which has a duration corresponding to the duration of the pulse width signal. Means in the receiver provide the output signal with a duration corresponding to the duration of the one transmission signal state, which corresponds in turn to the value of the input signal, and can be used for conversion to digital or analog form. Means in one of the transmitter or receiver supplies power for the transmission signal, and means in the other of the transmitter or receiver derives operational power, e.g., for the telemetering instrument, from the transmission signal. The signal transmission system thus is able to convey signals with less susceptibility to noise, while at the same time retaining the ability to convey operational power.
摘要翻译： 用于在现场遥测仪器和中央控制器之间或在中央控制器和过程控制装置之间传送信号的过程控制系统中使用的信号传输系统。 信号传输系统布置有接收输入信号的发射机，用于承载传输信号的传输线，以及接收发射信号的接收机和显影输出信号。
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