The presence or absence of objects tagged with transponders may be determined in an environment in which medical procedures are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. An array of cooling assemblies are placed on heat generating components mounted to printed circuit boards mounted in enclosure racks. The base receiver then communicates with an emergency system such as e-911 emergency services or a remote care system. Each end of the link has a termination point and the points of the two ends are at different distances from the web.