Key Points in Electrical Design for MRI Equipment in Hospitals
This paper introduces the working principles of medical magnetic resonance imaging(MRI)equipment and the electrical parameters of various mainstream MRI equipment manufacturers.It analyzes the impact of electromagnetic interference on MRI equipment and summarizes the critical values for the distance between transformers,cables,and magnets.Based on the requirements for radio frequency shielding between MRI equipment magnets,precautions for electrical design of radio frequency shielding are provided.Based on the power quality requirements of MRI equipment,a method for calculating the internal resistance of the power supply for MRI equipment is given,and corresponding Excel calculation software is developed.On this basis,relevant measures for the power distribution design of MRI equipment are presented.