Wireless near-infrared spectroscopy system for determining brain hemoglobin levels in laboratory animals

► The concentration changes of HbO2, HbR and HbT were significantly related to the traumatic impact strength. ► The infarction volumes after traumatic brain injury were significantly related to the traumatic impact strength. ► A wireless and non-invasive near-infrared spectroscopy system is an alternative tool for determining brain hemoglobin levels in laboratory animals after TBI.