Oxygen imaging is a technology that generates partial oxygen pressure (pO₂) maps of tissues in vitro and in vivo. O2M's patented oxygen imaging technology is based on pulse electron paramagnetic resonance oxygen imaging (EPROI). EPROI provides fast three-dimensional pO₂ maps non-invasively with high precision and high resolution. Oxygen imaging gives complete oxygen distribution and is distinct from pulse oximetry, polarographic electrodes, or oxygen-quenching luminescence sensors, which provide single point pO₂ values at the location of the probe.