• Giacomo Bellani, Jean-Jaques Rouby, Jean-Michel Constantin, and Antonio Pesenti.
• aDepartment of Medicine and Surgery, University of Milan-Bicocca bDepartment of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy cMultidisciplinary Intensive Care Unit, Department of Anesthesia and Critical Care, Pitie-Salpêtrière Hospital, Assistance Publique Hopitaux de Paris, University School of Medicine Pierre and Marie Curie, UPMC (University Paris-6), Paris dIntensive Care Unit, Department of Perioperative Medicine, University Hospital of Clermont-Ferrand, Centre Hospitalo-Universitaire de Clermont-Ferrand, Clermont Université, Université d'Auvergne, France eDipartimento di Anestesia, Rianimazione ed Emergenza Urgenza, Fondazione IRCCS Cà Granda-Ospedale Maggiore Policlinico and Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi di Milano, Milan, Italy.
• Curr Opin Crit Care. 2017 Feb 1; 23 (1): 30-37.

Purpose Of ReviewAdvanced imaging techniques have provided invaluable insights in understanding of acute respiratory distress syndrome (ARDS) and the effect of therapeutic strategies, thanks to the possibility of gaining regional information and moving from simple 'anatomical' information to in-vivo functional imaging.Recent FindingsComputed tomography (CT) led to the understanding of several ARDS mechanisms and interaction with mechanical ventilation. It is nowadays frequently part of routine diagnostic workup, often leading to treatment changes. Moreover, CT is a reference for novel techniques both in clinical and preclinical studies. Bedside transthoracic lung ultrasound allows semiquantitative regional analysis of lung aeration, identifies ARDS lung morphology and response to therapeutic maneuvers. Electrical impedance tomography is a radiation-free, functional, bedside, imaging modality which allows a real-time monitoring of regional ventilation. Finally, positron emission tomography (PET) is a functional imaging technique that allows to trace physiologic processes, by administration of a radioactive molecule. PET with FDG has been applied to patients with ARDS, thanks to its ability to track the inflammatory cells activity.SummaryProgresses in lung imaging are key to individualize therapy, diagnosis, and pathophysiological mechanism at play in any patient at any specified time, helping to move toward personalized medicine for ARDS.

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