Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . This results in vascular crowding at the lung bases . The cardiac silhouette is unremarkable given technique . A vague right basilar opacity is noted , which , in the appropriate clinical context , may represent pneumonia . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right basilar opacity may represent pneumonia in the appropriate clinical context .