Kidane, Tesfaye (PhD)Kelbiso, Berhanu2019-10-092023-11-092019-10-092023-11-092017-11-04http://10.90.10.223:4000/handle/123456789/19348Based upon Maxwell‟s equations, it has long been established that oscillating EM fields due to current carrying wire incident upon a metal surface, decay exponentially inside the conductor and this leads to the absence of EM fields at sufficient depths. Magnetic resonance imaging (MRI) utilizes radiofrequency (r.f.) EM fields to produce images. Here the first visualization of a virtual EM vacuum inside a bulk metal strip by MRI has been discussed and reviewed using the basic principle of RF EM field in MRI physics. This work is based on radio frequency field calculation inside cylindrical shell of finite thickness and infinite length due to excitation by concentric coils placed inside the shell. The B1 field calculation is made analytically using mathematical methods of separation of variable and the result is shown in terms of modified Bessel function and the skin depth effect and the result is simulated. Finally B1 field is the key component in MRI system and it also determines the EM vacuum in the case of low signal.enThesis