Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a moderate to large right pleural effusion with associated compressive atelectasis involving the right middle and lower lobes . Heart size is difficult to fully characterize due to silhouetting of the right heart border . The left lung appears clear . There is mild hilar congestion with cephalization and possible mild interstitial pulmonary edema . No pneumothorax . Mediastinal contour is normal . Bony structures are intact .
    OUTPUT:
    
Moderate to large right pleural effusion with associated right middle and lower lobe atelectasis . Mild hilar congestion with possible mild interstitial edema .