Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower compared to the previous examination . This accentuates the cardiac silhouette size which is borderline enlarged . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Patchy and linear opacities in the lung bases may reflect areas of atelectasis . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy and linear opacities in the lung bases , likely atelectasis in the setting of lower lung volumes .