Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Right basilar opacity is linear consistent with atelectasis . Retrocardiac opacity in the left lower lung is not well - visualized on lateral view . There is vascular congestion without overt edema . Mediastinal contours and hila are normal . The heart is mildly enlarged and the aorta is calcified . No pneumothorax .
    OUTPUT:
    
1 . Bibasilar opacities likely represent atelectasis and overlying soft tissue rather than pneumonia . 2 . Mild cardiomegaly .