Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette persists . The mediastinal and hilar contours are unchanged with atherosclerotic calcifications noted at the aortic knob . Pulmonary vasculature is not engorged . Small bilateral pleural effusions are demonstrated , larger on the right , not substantially changed in the interval , with mild compressive atelectasis . No pneumothorax is detected , however assessment of the lung apices is somewhat obscured by the patient 's neck and chin overlying these regions . Patient is status post right shoulder arthroplasty .
    OUTPUT:
    
Small bilateral pleural effusions , not substantially changed in the interval , with mild compressive atelectasis .