Design of a 5-Gauss line system to warn persons with medical implants from critical EM field

Abstract

In some medical magnetic resonant imaging environment with a high magnetic field, there is no protection system that detects the 5-Gauss line. This region presents a serious risk zone for both the patient and the implanted device. Frequently, patients having an active medical implant like a pacemaker can cross these areas without taking into consideration that there is a harmful magnetic field. Consequently, health complications may occur. In order to overcome these issues and prevent people with pacemakers from crossing this space, we have proposed a 5-Gauss magnetic field measuring device. It detects and measures the value of the magnetic field present accompanied by an audible signal of the critical line. In our case it is equal to or greater than 5-Gauss (0.5mT). The system measures the magnetic field detected by the Hall effect SS495A sensor that is controlled by an Arduino Uno card. We performed a validation of the 5-Gauss line detection system in the medical magnetic resonant imaging environment of the military hospital of Tunis. The obtained results are very satisfactory, since the system ensures the required function.