发明名称 |
GAMMA RADIATION DETECTOR WITH ENHANCED SIGNAL TREATMENT |
摘要 |
GAMMA RADIATION DETECTOR WITH ENHANCED SIGNAL TREATMENT A hand-held gamma radiation probe is employed to locate radiation concentrations in animal tissue in conjunction with a control function providing an enhanced audio output particularly suited for cuing the user as to source position. The probe is positioned at a location on the animal body representing background radiation and a squelch low count rate is developed therefrom. The squelch low count rate is multiplied by a range factor to develop a squelch high count rate and frequencies are developed from a look-up frequency table from lowest to highest in correspondence with the developed high and low squelch count rates. Slew rate limiting of the count rates is provided by development of a squelch delta value representing the difference between the squelch high and low count rates divided by a time element. Selection of frequencies for audio output from the frequency table is limited by the value of the squelch delta value. A weighting of received radiation counts is carried out continuously to develop count rate values used by the system. |
申请公布号 |
CA1313429(C) |
申请公布日期 |
1993.02.02 |
申请号 |
CA19890611820 |
申请日期 |
1989.09.18 |
申请人 |
NEOPROBE CORPORATION |
发明人 |
RAMSEY, RAYMOND C.;THURSTON, MARLIN O. |
分类号 |
G01T1/20;A61N5/10;G01T1/161;G01T1/164 |
主分类号 |
G01T1/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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