A method for designing birdcage coils based on a simplified magnetic field model, validated experimentally at 4 T, 7 T, and 15.2 T

Magnetic resonance imaging and spectroscopy rely on magnetic fields generated by radiofrequency (RF) volume coils for high-quality data acquisition. Understanding electromagnetic field behavior in these coils is key to optimizing imaging and designing advanced coils. This paper presents an alternative tool to validate experimental and simulated results from traditional bridge coils using a theoretical approach to derive the magnetic field B1 expression for a BC coil. The formula will be used for: (a) assessing RF coil performance for high-quality images with optimal SNR and accurate anatomical representation, and (b) guiding the development of BC coils for specific applications. To validate the model, phantom images were acquired at different resonant frequencies, and the results were compared with experimental data. The findings confirm the accuracy and effectiveness of the model, offering insights into electromagnetic field behavior and providing a framework for advancing RF coil design in MR imaging and MR spectroscopy.