Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There may be mild unchanged cardiomegaly . Retrocardiac opacity likely reflects basilar atelectasis . Bibasilar interstitial abnormality was better characterized on prior CT chest from ___ . Otherwise , the lungs are clear without new focal consolidation . There is no pneumothorax . There is no pleural effusion . Minimal angulation of a left lateral rib , likely the seventh rib , is noted without a discrete fracture line .
    OUTPUT:
    
1 . Bibasilar interstitial lung disease , better characterized on prior CT chest ___ . No superimposed acute cardiopulmonary process . 2 . Unchanged mild cardiomegaly . 3 . Minimal apparent angulation of the left lateral seventh rib may reflect a fracture dislocation . Correlate with focal pain on physical exam at this location . 4 . Otherwise , no displaced rib fracture noted . Note that chest radiography is not sensitive for the detection of subtle or nondisplaced rib fractures .