Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline enlarged . The hilar and mediastinal contours are unremarkable . There are no focal consolidations concerning for infection , pleural effusions or pneumothoraces . There is evidence of retrocardiac atelectasis , stable compared to the prior exam . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process identified .