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公开(公告)号：US4482958A
公开(公告)日：1984-11-13
申请号：US320566
申请日：1981-11-12
CPC分类号： G06T11/006 , Y10S378/901
摘要： A data processing device applied to a computed tomography system which examines a living body utilizing radiation of X-rays is disclosed. The X-rays which have penetrated the living body are converted into electric signals in a detecting section. The electric signals are acquired and converted from an analog form into a digital form in a data acquisition section, and then supplied to a matrix data-generating section included in the data processing device. By this matrix data-generating section are generated matrix data which correspond to a plurality of projection data. These matrix data are supplied to a partial sum-producing section. The partial sums respectively corresponding to groups of the matrix data are calculated in this partial sum-producing section and then supplied to an accumulation section. In this accumulation section, the final value corresponding to the total sum of the matrix data is calculated, whereby the calculation for image reconstruction is performed.
摘要翻译： 公开了一种应用于利用X射线辐射检测生物体的计算机断层摄影系统的数据处理装置。 已经穿透活体的X射线在检测部分被转换为电信号。 在数据采集部分中将电信号从模拟形式获取并转换为数字形式，然后提供给包括在数据处理装置中的矩阵数据生成部分。 由该矩阵数据生成部生成与多个投影数据对应的矩阵数据。 这些矩阵数据被提供给部分求和部分。 在该部分和产生部分中计算分别对应于矩阵数据的组的部分和，然后提供给累积部分。 在该积累部中，计算与矩阵数据的总和对应的最终值，由此进行图像重构的计算。
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公开(公告)号：US5118948A
公开(公告)日：1992-06-02
申请号：US494183
申请日：1990-03-14
IPC分类号： G01T1/164
CPC分类号： G01T1/1642
摘要： A radiation ray (gamma ray) radiated from a test subject previously dosed with radioisotope is incident on a scintillator and converted into scintillation light. A plurality of photomultipliers arranged in a hexagon receive and convert the scintillation light into electrical signals. Photomultipliers arranged in parallel with sides of the hexagon constitute a group. Output signals of the photomultipliers are supplied to a first position detector for detecting a group of photomultipliers which receives the scintillation light and deriving position information Xo and Yo representing the approximate gamma ray incident position. The position information Xo and Yo and the output signals of the photomultiplier are supplied to a second position detector for deriving position information x and y representing the precise gamma ray incident position. Outputs of the photomultiplier are supplied to a pulse height analyzer which derives incident radiation energy information z.
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