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各种医用核素扫描机(以下简称扫描机)无论其结构繁简如何,均含有扣本底电路,这正是扫描机不同于其它核仪器的独特之处。 在应用扫描机作各种脏器扫描时,都会遇到扣本底的问题。因为从闪烁探头接收到的信号,除来自被扫脏器部位所积聚的核素放出的γ射线外,还有环境中的自然辐射(称天然本底),以及与被扫脏器同一示踪放射性能量的“血本底”。第一种信号为扫描所
All kinds of medical radionuclide scanners (hereinafter referred to as scanners), regardless of their structure and complexity, contain deduction background circuit, which is different from other nuclear scanner scanner unique. In the application of scanning machine for various organs scan, will encounter the problem of deducting background. Because of the signals received from the scintillation probe, in addition to the gamma radiation emitted by the nuclide accumulating in the area of the device being abused, as well as the natural radiation in the environment (termed natural background) and the same trace The “blood-bottom” of radioactive energy. The first signal for the scan