Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . There is a moderate pleural effusion at the anterior left lung base . Left basilar atelectasis and scarring are somewhat improved . The right lung is fully expanded and clear with resolution of previous basilar atelectasis . Two small nodules project over the left second anterior rib , likely related to procedure . There is no pulmonary edema or pneumothorax . The heart size is normal . Mediastinal and hilar contours are normal .
    OUTPUT:
    
Moderate pleural effusion at anterior left lung base with associated compressive atelectasis and scarring .