Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There low lung volumes . Subtel retrocardiac opacity is likely atelectasis . There is no pulmonary edema or pleural effusion . There is no pneumothorax . Massive cardiomegaly is again seen , similar to prior exam .
    OUTPUT:
    
No acute cardiopulmonary process . Stable enlargement of the cardiac silhouette .