Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aortic arch is partly calcified . There is a suspected small left - sided pleural effusion with no definite pleural effusion on the right . There is no evidence for pneumothorax . The lungs appear clear aside from streaky left basilar opacity , probably due to minor atelectasis .
    OUTPUT:
    
No evidence of acute disease .