Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are very low , resulting an bronchovascular crowding , and accentuation of the cardiac silhouette . Left basilar opacity may represent atelectasis , however aspiration or pneumonia could be considered in the appropriate clinical setting . No pneumothorax or pleural effusion . No acute displaced rib fracture .
    OUTPUT:
    
Left basilar opacity may represent atelectasis , however aspiration or pneumonia could be considered in the appropriate clinical setting .