What is the primary role of the RF coil in MRI?

The primary role of the RF coil in MRI is to deliver and receive the MR signal. RF coils generate the RF pulses that excite the hydrogen nuclei in the body, prompting them to emit signals that are detected by the same or other coils. This interaction is crucial because it helps create the images that form the basis for MRI. The quality of these signals, which are formatted and transformed into images by the MRI system, is heavily dependent on the design and positioning of the RF coil.

While the RF coil plays a significant role in signal generation and reception, it is important to note that other components of the MRI system also perform essential functions. For instance, the gradient coils are responsible for spatial encoding of the images, and the main power supply is necessary to provide energy for the entire system. However, those functions do not pertain to the RF coil specifically, affirming that its unique contribution lies in the acquisition of MR signals vital for imaging.