Detection of glass foreign bodies in soft tissues with low-frequency EPR spectroscopy

The detection of glass particles in glass-induced injuries is often difficu lt. Most commercial glasses contain iron (Fell) centers which present a cha racteristic electron paramagnetic resonance (EPR) spectrum near g = 4.3. Th e detection of small glass particles in vivo can be achieved with low-frequ ency EPR spectroscopy (1.2 GHz) operating at low field. The method was succ essfully applied in anesthetized live animals where small pieces of glass w ere implanted under the skin in their backs. This could be a new clinically relevant application of EPR spectroscopy.