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91. 发明授权

US4653000A Image signal-processing system based on synthetic aperture technique 失效
标题翻译：基于合成孔径技术的图像信号处理系统
公开(公告)号：US4653000A
公开(公告)日：1987-03-24
申请号：US646156
申请日：1984-08-31
申请人： Kenzo Matsumoto
发明人： Kenzo Matsumoto
IPC分类号： A61B8/14 , G01S15/89 , G06F15/42 , G06G7/60
CPC分类号： G01S15/8997 , A61B8/14 , G01S15/897 , G01S15/8977
摘要： In an ultrasonic computed tomography system including an image signal-processing apparatus for reconstructing an image signal of an object on the basis of a synthetic aperture technique, a probe includes a transducer unit. The transducer unit emits an ultrasonic beam to the object and detects the corresponding echo wave. Hologram data is produced in response to the echo wave and then digitized to have a predetermined number of bits by A/D converters. The digital hologram data is temporarily stored in buffer memories and read out under the control of a computer unit. The computer unit has a ROM assembled therein to prestore digital kernel function data, the number of whose bits is smaller than that of the digital hologram signals. The computer unit executes a convolution on the digital hologram data and the kernel function data, thus increasing the speed of a computation needed for image reconstruction.
摘要翻译：在包括用于基于合成孔径技术重建物体的图像信号的图像信号处理装置的超声波计算机断层摄影系统中，探针包括换能器单元。换能器单元向对象发射超声波束并检测相应的回波。响应于回波产生全息数据，然后通过A / D转换器数字化以具有预定数量的位。数字全息图数据临时存储在缓冲存储器中，并在计算机单元的控制下读出。计算机单元具有组装在其中的ROM以预存数字核心功能数据，其位的数量小于数字全息图信号的数量。计算机单元对数字全息图数据和内核功能数据执行卷积，从而增加图像重建所需的计算速度。

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