The diagnosis of bronchiolitis, the most frequent lung infectious disease in infancy, is
based on clinical examination. Chest X-ray is proposed when a lung parenchymal condensation
is suspected. Chest ultrasound is supposed to be a useful tool in the diagnosis of these
complication but is poorly evaluated. We aim to compare chest X-ray and chest ultrasound for
the diagnosis of parenchymal condensation in infant with bronchiolitis.