Fig. 6From: Computer-assisted evaluation of small airway disease in CT scans of Iran-Iraq war victims of chemical warfare by a locally developed software: comparison between different quantitative methodsAT maps from A) static threshold of -856HU, B) the Parametric Response Map(PRM), and C) the Air Trapping Index(ATI) method in a patient (lower row), and control subject (upper row)Back to article page