Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is stable . The aorta is tortuous . Opacities in the left lower lobe are likely atelectases less likely pneumonia in the appropriate clinical setting . Scarring and tiny calcified nodules in the apices bilaterally right greater than left are unchanged . There is no pneumothorax or pleural effusion . There are mild degenerative changes in the thoracic spine
    OUTPUT:
    
Left lower lobe opacities are likely atelectasis , differential diagnosis includes pneumonia in the appropriate clinical setting