The Availability to Target Different Nuclei in Ultrahigh MRI Using Dual Band RF Coil

摘要

Efficient non-ionizing, non-invasive medical imaging technique; magnetic resonance imaging (MRI); is used for human body structures' visualization. Proton (¹H) imaging is the dominant nucleus imaged for its high magnetic moment. Yet, for imaging tissue functionality, it requires MRI technology to target nuclei other than hydrogen (¹H) nucleus. Many challenges arise targeting these nuclei. Amongst them; low signal-to-noise ratio (SNR). Enhancing SNR affects B₁ field homogeneity across the field of view (FOV).In this paper; the design and simulation of new coil based on dual-band birdcage RF coil for combined (¹H/X) MRI at 7 Tesla is presented. Micro-strip dipole antenna is used as basic element. The simulation is obtained by COMSOL Multi-Physics v5.3. The results of this paper provide the S₁₁ parameter to respond at the desired frequencies for ¹H/³¹P, the spatial distribution of B₁ field over each antenna element to be Gaussian homogeneous, and the surface current of the antenna element to be the maximum at these desired frequencies for ¹H/³¹P. The results of this paper can be used to enhance and develop the MRI technique to lead the better visualization of tissue anatomy and its corresponding physiological status within the same image.