Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , there is interval decrease in lung volumes , which accentuates the cardiomediastinal silhouette and bronchovascular structures . Heart size is normal . Hilar and mediastinal contours are normal . No focal consolidation concerning for pneumonia . Compression deformities and vertebroplasty changes are unchanged .
    OUTPUT:
    
No focal consolidation concerning for pneumonia . Low lung volumes .