Using qER-Quant assists in quantifying the volume of intracranial structures and lesions rapidly and precisely. This capability is used by clinicians to track the progress of patients with hemorrhagic stroke, traumatic brain injury or hydrocephalus and by researchers to develop new quantitative outcome measures. Clinicians can use these quantitative measurements to assist with determining the severity of the trauma, lesion or underlying disease, or to assist with the comparison of multiple CT scans.