Abstract: A system that incorporates teachings of the present disclosure may include, for example, a Magnetic Resonance Imaging system comprising a Magnetic Resonance (MR) scanner to selectively couple to one among a plurality of antennas without compromising spatial alignment with an anatomical sample during signal acquisition by the MR scanner. According to one embodiment, the invention teaches to replace a single-tuned antenna tuned to a first resonance frequency by another single-tuned antenna tuned to a different resonance frequency in the course of an MRI experiment (e.g. metabolic quantification).