spectroscopy

Full Definition

Magnetic resonance spectroscopy (MRS) is a non-invasive imaging technique that quantifies brain metabolites by analyzing their unique chemical shift signatures. Unlike conventional MRI which produces anatomical images, spectroscopy generates metabolic information about tissue composition, including levels of N-acetylaspartate, choline, creatine, and lactate. This technique provides valuable diagnostic information for tumor characterization, metabolic disorders, and treatment monitoring.

Usage

Usage note: Often abbreviated as MRS in clinical contexts; distinguish from spectral imaging techniques.

In Context

• "Single-voxel spectroscopy revealed elevated choline levels within the lesion." — Clinical report
• "Proton spectroscopy findings supported the diagnosis of glioblastoma." — Radiology report