Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is redemonstrated , similar to the prior exam . Right - sided aortic arch is again noted . Cardiomediastinal contours are otherwise unremarkable . As before , there is compression of the trachea posteriorly by the right aortic arch and aberrant left subclavian artery as seen on the prior CT from ___ . The pulmonary vasculature is normal . Mild atelectasis is seen at the lung bases bilaterally . There is no pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No focal consolidations concerning for pneumonia identified .