Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Focal opacity is noted at the right lung base with likely atelectasis at the left lung base . A moderate right pleural effusion is present . The cardiomediastinal silhouette and hilar contours are normal . There is no pneumothorax .
    OUTPUT:
    
1 . Focal opacity at the right lung base , which on concurrent CT chest appears to be compressive atelectasis . 2 . Moderate right pleural effusion .