Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is re - demonstrated . The mediastinal and hilar contours are unchanged . There is mild pulmonary vascular engorgement . There is persistent elevation of the left hemidiaphragm with associated left basilar opacity likely reflective of atelectasis . A trace left pleural effusion may be present . Atelectatic changes are seen in the right lung base . No pneumothorax is demonstrated .
    OUTPUT:
    
Mild pulmonary vascular engorgement . Persistent elevation of the left hemidiaphragm with adjacent left basilar opacity , likely atelectasis . A trace left pleural effusion may be present .