Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There are low lung volumes . Ill - defined opacification in the bilateral lower lungs medially may represent vascular crowding secondary to low lung volumes with some minimal atelectasis , however an infectious process can not be ruled out . The cardiomediastinal silhouette is unremarkable . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
Ill - defined opacities in the bilateral lower lungs medially may represent atelectasis and vascular crowding secondary to low lung volumes , however an infectious process in the appropriate clinical setting is also possible .