GAMMASTRAHLUNGSDETEKTOR MIT WEITERVERARBEITUNG MITTELS SIGNALVERSTAERKUNG.
摘要
<p>A hand-held gamma radiation probe (12) is employed to locate radiation concentrations in animal tissue in conjunction with a control function providing an enhanced audio output particularly suited for curing the user as to source position. The probe (12) 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 lock-up frequency table from lowest to highest in correspondance 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.</p>
申请公布号
DE68907697(D1)
申请公布日期
1993.08.26
申请号
DE1989607697
申请日期
1989.09.21
申请人
NEOPROBE CORP., COLUMBUS, OHIO, US
发明人
RAMSEY, RAYMOND CRAIG, COLUMBUS OHIO 43214, US;THURSTON, MARLIN O., COLUMBUS OHIO 43220, US