Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is re- demonstrated . Bilateral hilar enlargement compatible with pulmonary arterial hypertension is unchanged . Mediastinal contour is similar . Pulmonary vasculature is not engorged . Patchy opacity within the left lower lobe may reflect atelectasis . No pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Minimal left lower lobe patchy opacity , likely atelectasis . No pulmonary edema . Findings compatible with pulmonary arterial hypertension , unchanged .