Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are within normal limits . The pulmonary vasculature is not engorged . Patchy left basilar opacity may reflect atelectasis or scarring , unchanged . Mild blunting of the left costophrenic angle could suggest the presence of a trace pleural effusion . No new focal consolidation is present . There is no pneumothorax . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Persistent left basilar patchy opacity which may reflect atelectasis or scarring . Minimal blunting of the left costophrenic sulcus could suggest the presence of a trace left pleural effusion .