Gamma camera system
    1.
    发明授权
    Gamma camera system 失效
    伽玛相机系统

    公开(公告)号:US5391880A

    公开(公告)日:1995-02-21

    申请号:US207660

    申请日:1994-03-09

    申请人: Atsushi Habara

    发明人: Atsushi Habara

    IPC分类号: G01T1/161 G01T1/164 G01T1/166

    CPC分类号: G01T1/1642 A61B6/037

    摘要: A gamma camera system is provided for obtaining a distribution image (i.e. a reconstruction and/or multiplanar reconstruction image) of a radioisotope injected into an object by dynamic study on the basis of .gamma.-rays emitted from the radioisotope. The system comprises a two-dimensional detector for detecting the .gamma.-rays, the detector being repeatedly rotated around the object. There are provided an element for forming image data of a reference image and the distribution image on the basis of detected signals from the detector, an element for obtaining a change in quantity of the .gamma.-rays every one rotation of detector, an element for specifying one of the plurality of rotations, the specified rotation corresponding to a maximum number of the .gamma.-rays, and an element for displaying the reference image using the reference image data corresponding to the specified one rotation. Further provided is an element for manually setting information required to obtain the distribution image using the displayed reference image. Using manually set information, the image data forming element creates the distribution image data.

    摘要翻译: 提供伽马相机系统,用于通过基于从放射性同位素发射的γ射线的动态研究来获得注入到对象中的放射性同位素的分布图像(即,重建和/或多平面重建图像)。 该系统包括用于检测伽马射线的二维检测器,检测器围绕物体重复旋转。 提供了一种用于基于来自检测器的检测信号形成参考图像和分布图像的图像数据的元件,用于获得检测器每旋转一次的γ射线量的变化的元件,用于指定 多个旋转中的一个,对应于最大数量的伽马射线的指定旋转,以及使用与指定的一次旋转相对应的参考图像数据来显示参考图像的元素。 还提供了一种用于使用所显示的参考图像手动设置获得分布图像所需的信息的元素。 使用手动设置信息,图像数据形成元件创建分布图像数据。

    Digital scintillation camera system with correction for analog
scintillation camera system characteristics
    2.
    发明授权
    Digital scintillation camera system with correction for analog scintillation camera system characteristics 失效
    数字闪烁摄像机系统具有校正模拟闪烁摄像机系统的特点

    公开(公告)号:US4982327A

    公开(公告)日:1991-01-01

    申请号:US793767

    申请日:1985-11-01

    IPC分类号: A61B6/00 G01T1/164

    摘要: In a digital scintillation camera system, image data representing an radioisotope distribution is detected by a scintillation camera and is then digitized and converted to a video signal. The video signal is processed in a video imager to produce a diagnostic image on a film. A count-to-grey-level converter is arranged to convert a radiation count of diagnostic image data to a grey-level. A count-to-grey-level conversion table is accessed in the converter. The conversion table includes a correction component for obtaining the same count-density characteristics of a film as in a conventional analog scintillation camera system.

    摘要翻译: 在数字闪烁照相机系统中,通过闪烁照相机检测表示放射性同位素分布的图像数据,然后被数字化并转换为视频信号。 视频信号在视频成像器中处理以在胶片上产生诊断图像。 计数到灰度级转换器被布置成将诊断图像数据的辐射计数转换为灰度级。 在转换器中访问计数到灰度级的转换表。 转换表包括用于获得与常规模拟闪烁照相机系统相同的膜的相同计数密度特性的校正组件。

    Data processing device for use in scintillation camera apparatus
    3.
    发明授权
    Data processing device for use in scintillation camera apparatus 失效
    用于闪烁照相机装置的数据处理装置

    公开(公告)号:US4858151A

    公开(公告)日:1989-08-15

    申请号:US098194

    申请日:1987-09-17

    申请人: Atsushi Habara

    发明人: Atsushi Habara

    IPC分类号: A61B6/03 G01T1/164 G06T1/00

    CPC分类号: G01T1/1647

    摘要: A scintillation camera apparatus adapted for displaying an image representing a radioisotope distribution within a subject under examination at a substantially constant level in image density during a persistent data acquisition procedure comprises an auxiliary memory for sequentially storing position signals representing detected positions of gamma rays, and an image memory for storing a count representing the frequency of detection of gamma rays in a memory location accessed by position signals. The auxiliary memory has a predetermined capacity, and thus, when the number of the sequentially stored position signals exceeds this memory capacity, the earliest-entered position signals stored therein are made to overflow therefrom. A memory controller accesses a location in the image memory by means of the overflowed position signals and decrements the content at the accessed location. After position signals are made to overflow from the auxiliary memory, the quantity of data stored in the image memory (the total number of counts of gamma rays) remains always at a constant value equal to the capacity of the auxiliary memory.

    摘要翻译: 一种闪烁照相机装置,用于在持续数据采集过程中以图像浓度基本上恒定的水平显示表示被检查对象内的放射性同位素分布的图像,该辅助存储器用于顺序存储表示检测到的伽马射线位置的位置信号, 图像存储器,用于存储表示由位置信号访问的存储器位置中的伽马射线检测频率的计数。 辅助存储器具有预定的容量,因此,当顺序存储的位置信号的数量超过该存储器容量时,使存储在其中的最早输入的位置信号从其溢出。 存储器控制器通过溢出的位置信号访问图像存储器中的位置,并减少访问位置处的内容。 在使位置信号从辅助存储器溢出之后,存储在图像存储器中的数据量(伽马射线的总计数)总是保持在等于辅助存储器容量的恒定值。