Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . Calcified tortuous aorta is also unchanged . Lungs are grossly clear without pleural effusions or pneumothorax . Subtle left basilar opacity may be due to atelectasis or early aspiration . No focal consolidation identified .
    OUTPUT:
    
Subtle left basilar opacity may be due to atelectasis or early aspiration .