Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Low lung volumes are seen on both the frontal and lateral views . Increased interstitial markings are seen throughout the lungs but most notably at the lung bases . There is no pleural effusion or confluent consolidation . The cardiomediastinal silhouette is grossly unremarkable . Atherosclerotic calcifications noted at the aortic arch . No definite acute osseous abnormality identified . Thoracolumbar S - shaped scoliosis is identified with degenerative changes in the spine .
    OUTPUT:
    
Low lung volumes with increased interstitial markings throughout both lungs most notably at the bases . This may in part be due to atelectasis although underlying edema or chronic interstitial process such as fibrosis is possible given the lungs volume . No definite focal consolidation .