Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is difficult to assess given the presence of a moderate - sized right pleural effusion , not substantially changed since the previous study . There is continued right basilar compressive atelectasis . The left lung is clear . No pulmonary vascular congestion or pneumothorax is present . The mediastinal and hilar contours are grossly unchanged . There are no acute osseous abnormalities .
    OUTPUT:
    
Moderate size right pleural effusion , not substantially changed in the interval , with continued right basilar compressive atelectasis .