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    • 15. 发明授权
    • Radiation detection device for nuclear medicine diagnosis device and detecting method therefor
    • 核医学诊断装置用辐射检测装置及其检测方法
    • US07045789B2
    • 2006-05-16
    • US10381601
    • 2001-10-01
    • Koichi OgawaTakuzo Takayama
    • Koichi OgawaTakuzo Takayama
    • G01T1/164G01T1/24
    • G01T1/2985A61B6/037A61B6/4258
    • In case of performing so-called “PET acquisition”, a nuclear medical diagnosis apparatus according to the present invention does not set only gamma rays which imparted predetermined energy values (for example, energy values of and above a Compton edge), as subjects for coincidental counting acquisition (coincidence acquisition), but it discriminates also further gamma rays which caused a photoelectric effect after having undergone Compton scattering once in a radiation detection unit, so as to set them as subjects for the coincidental counting acquisition. Concretely, if the added value of energy values observed in two detection elements is “near 511 keV”, the existence of the further gamma ray is presumed, and the acquisition thereof is possible. Besides, that one of the two detection elements as to which energy near the Compton edge is observed can be specified as the incident position of the gamma ray on the radiation detection unit.
    • 在进行所谓的“PET采集”的情况下,根据本发明的核医学诊断装置不能仅设定赋予预定能量值(例如,康普顿边缘以上的能量值)的伽马射线,作为 巧合计数采集(重合获取),但是在放射线检测单元中经历了康普顿散射一次之后,还鉴别出引起光电效应的另外的伽马射线,从而将它们设置为重合计数采集的对象。 具体地说,如果在两个检测元件中观察到的能量值的附加值为“接近511keV”,则推测存在另外的伽马射线,并且其获取是可能的。 此外,观察到康普顿边缘附近的能量的两个检测元件中的一个可以被指定为伽马射线在放射线检测单元上的入射位置。