Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . There is minimal opacity in the right costovertebral sulcus which is likely atelectatic however may represent minimal aspiration . Lungs are otherwise clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Minimal opacity at the right costovertebral sulcus which is likely atelectatic however may represent mild aspiration .