Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is re- demonstrated , similar compared to the previous exam . Right - sided aortic arch is again noted , and the mediastinal and hilar contours are unchanged . As before , there is compression of the trachea posteriorly by the right aortic arch and aberrant left subclavian artery as seen on the previous chest CT from ___ . The pulmonary vasculature normal . Minimal atelectasis is noted lung bases . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Cardiomegaly without evidence for congestive heart failure . Mild bibasilar atelectasis . Right - sided aortic arch .