Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , or pneumothorax . Prominence of interstitial markings at the bases is likely due to chronic interstitial disease as seen on the prior CT chest . Small nodules within the upper lobes are most consistent with granulomas as seen on the prior CT . Rounded density at the left base is most consistent with atelectasis . The heart size is top normal . There are degenerative changes within the thoracic spine but no acute fractures .
    OUTPUT:
    
No acute cardiopulmonary process . Chronic interstitial abnormality at the lung bases , similar to the prior CT , which was possibly attributable to chronic aspiration or UIP at that time .