Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of chest demonstrate clear lungs . The aorta is very tortuous . There is no pneumothorax or pleural effusion . There is no pulmonary edema . Lung volumes are lower today and then 2 days prior . Minimal left lower lobe atelectasis is again present .
    OUTPUT:
    
No evidence of pneumonia .