Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Exam is extremely limited secondary to extremely low lung volumes . That said , there has been significant interval change since prior with indistinct pulmonary vascular markings and possible more confluent consolidation at the right lung base . Osseous structures are unremarkable . Rounded calcific density in the right upper quadrant compatible with calcified gallstones .
    OUTPUT:
    
Extremely low lung volumes . Increased interstitial markings in lungs bilaterally right greater than left when compared to prior suggestive of edema . More confluent opacity of the right lung base raising possibility of superimposed infection .