Magnetic resonance spectroscopy (MRS) is a non-invasive imaging technique that analyzes the chemical composition of tissues in the body. It uses the principles of magnetic resonance imaging (MRI) to detect specific metabolites, providing insights into cellular processes and biochemical changes in various conditions, such as cancer or neurological disorders. MRS can help in diagnosing diseases by identifying abnormal levels of certain compounds, like lactate or choline, which may indicate metabolic disturbances. This technique is particularly useful in research and clinical settings, allowing for better understanding of disease mechanisms and guiding treatment decisions without the need for invasive procedures.