Abstract: An MRI coil testing system includes a frequency response monitoring subsystem and a temperature monitoring subsystem. The frequency response monitoring subsystem includes an embedded receiver probe configured to measure each individual coil's resonant frequency and nng-up/ring-down time, and a processor configured to output an alert if the resonant frequency or ring-up/ring-down time exceeds or violates respective thresholds. The temperature monitoring subsystem includes an embedded temperature probe configured to monitor the temperature of individual coils and the temperature of a magnetic resonance/radio frequency connector, and a processor configured to output an alert if either temperature exceeds a threshold.

Abstract: A system for monitoring the location of individuals, such as parolees, includes a wearable device worn by the individual and a portable device operatively coupled to the wearable device. The portable device is operatively coupled to a monitoring system through a wireless telephone network. The portable device transmits periodically encrypted location information as well as status information across the wireless network to the monitoring system. The monitoring system tracks the location of the individual and alerts the appropriate authorities when the individual violates a rule, such as a condition for parole. The portable device increases the time between transmissions when the individual is within a specified home location and reduces the time between transmissions when outside the specified location.