Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes accentuate the cardiac silhouette and bronchovascular structures . Considering this factor , heart size is upper limits of normal . Lungs are grossly clear on the PA view . Localized opacity in the infrahilar region the lateral view is probably due to confluence of vascular structures accentuated by the low lung volumes .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia or congestive heart failure . 2 . Infrahilar opacity on lateral radiograph , most likely due to superimposition of vascular structures accentuated by low lung volumes . Repeat lateral radiograph with improved technique is suggested to confirm this impression and to exclude the possibility of a nodule or mass in this region .