Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen are diffuse increased interstitial markings . Opacities in left mid and lower and right infrahilar regions are more confluent on this exam , possibly somewhat accentuated by technical differences . The cardiomediastinal silhouette is grossly unchanged . The aorta is again noted to be densely calcified . The azygos vein is dilated , measuring 18 mm , slightly increased compared with the prior study and suggestive of right heart failure . No gross effusions are identified . No pneumothorax is detected . Catheter / tubing again noted over the upper abdomen immediately to the left of midline .
    OUTPUT:
    
Diffuse interstitial opacities in both lungs , with more confluent areas in the left mid / lower and right infrahilar regions . The areas of confluence are slightly more pronounced than on the prior study . The appearance is concerning for infectious infiltrates . The possibility of developing pulmonary edema can not be entirely excluded , but is considered less likely in the absence of significant pleural effusion .