Design of an alarm system for MRI suite

Abstract

Whit increasing use of X-ray devices for diagnostic or therapeutic purposes, and the lack of awareness among patients of the risk resulting from non-compliance with procedure and guidelines for security and safety, hospitals need emerged for the use of alarm systems to protect patients beneficiaries of the services provided to them in these sections. One of the most important of these devices – MRI – which depends on its work on the magnetic field tremendously up to 2 tesla, and here lies the danger to access this section , especially if the possession of the patients metal tools or was employed person for wheelchairs or pacemaker or medical screws used to install during bone injuries. This project aims to provide the MRI suite with an alarm system, the alarm system includes three stages of warning and protection, the first stage uses optical sensor to detect and alarm the staff when the patient crosses the optical line, the second stage alarm works in the form the staff when the patient crosses the optical line. The second stage alarm works in the form of voice message if the visitor has metals , the motor driver circuit controls the suite door by received signal through PIC from proximity inductive sensor.