Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are normal . Mild to moderate enlargement of the cardiac silhouette is unchanged from chest radiograph ___ . Bilateral hilar enlargement is compatible with enlargement of the bilateral pulmonary arteries as seen on CT chest ___ . There are bibasilar opacities which likely represent atelectasis , however an infectious etiology can not be ruled out . Degenerative changes of the lower thoracic spine . Mild pulmonary vascular congestion without frank pulmonary edema or pleural effusions is demonstrated . No pneumothorax .
    OUTPUT:
    
1 . Bibasilar opacities which likely represent atelectasis , however an infectious etiology can not be excluded in the correct clinical setting . 2 . Cardiomegaly grossly unchanged from ___ with mild pulmonary vascular congestion . 3 . Pulmonary arterial enlargement suggestive of underlying pulmonary arterial hypertension .