Development of Tissue Emulatory Models/Phantoms of Lungs at Microwave Frequency for Acute Respiratory Distress Syndrome

Acute respiratory distress syndrome is a severe and life-threatening condition when our lungs are severely injured by infection or trauma. In this paper, we discuss human lung emulators or phantoms with similar dielectric properties of human lungs to study and treat ARDS as testing precursors. We have developed two semi-solid inflated and deflated lung phantoms to analyze the respiratory distress due to the change in the lung permittivity. The size, shape and volume of the phantoms are chosen from the study done on 166 patients' CT image sets. The performance of the phantoms is carried out by measuring the dielectric properties at frequency range 0.5 - 10 GHz using an open-ended coaxial slim probe technique by Agilent Keysight Technologies. The measured data is compared with Istituto di Fisica Applicata “Nello Carrara” (IFAC) database. The measured dielectric properties of emulatory models show good degree of alliance with respect to the IFAC data.