Steen could not afford the standard radiation-detecting equipment used by uranium prospectors - the Geiger counter.
Modern versions of the Geiger counter use the halogen tube invented in 1947 by Sidney H. Liebson.
New Jersey Transit purchased belt clip-on radiation detectors as well as other explosive and radiological material detecting equipment to ensure that all of its regional police commands and officers throughout the state are equipped to detect explosives and radiological matter.
Before the invention of the rectilinear scanner in 1950 by Benedict Cassen, nuclear medicine pioneers used to move their insensitive Geiger Counters over different parts of the body, which resulted in a fairly crude determination of the distribution of radioactivity.
Then, during the biopsy, the physician visually inspects the lymph nodes for staining and uses a gamma probe or a Geiger counter to assess which lymph nodes have taken up the radionuclide.
There they find the primitives worshipping the remains of Susan's husband as they can hear his Geiger counter ticking, and believe it to be his heart still working.
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