Dynamic phase contrast imaging of lung aeration during assisted ventilation at birth.

The transition to exta-uterine life at birth is dependent upon the rapid clearance of liquid from the airways to allow the entry of air. Despite the importance of liquid clearance adn lung aeration for survival at birth, the factors controlling the rate and pattern of lung aeration at birth are poorly understood. In particular, the resuscitation, ventillation and transition to extra-uterine life of infants that are born preterm is compicated by the failure of the lungs to clear liquid from the airways; similar problems can be experienced by term infants that are delivered by ceasarian section.