Simulation of MRI RF Coil

Abstract

In this paper, four-element coil operating at 7T is simulated. It can be used as a volume coil for reception. MRI imaging at ultra-high field strength requires frequencies in the ultra-high frequency range. The resonant frequency of each element was tuned at 300 MHz (the proton (¹H) Larmor frequency of the 7T magnet). This study showed that the intensity of the magnetic field is higher in the region where the elements were closest to the phantom. The one element coil is useful for detecting signal near the surface of the region of interest.  It was noted that a surface coil covers a small area that results in a small field of view (FOV). Simulations have shown that, adding more than one coil increased the field of view. A full image is acquired using a volume coil and it almost completely covered the phantom region, compared to a single coil of the same dimensions and, hence, excellent magnetic fields were achieved.