Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lungs remain hyperinflated . Blunting of the costophrenic angles posteriorly is again noted , which may reflect pleural thickening versus small bilateral pleural effusions . Bibasilar atelectasis is likely present . No focal consolidation or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Blunting of the costophrenic angles posteriorly appears chronic , and may reflect pleural thickening or small bilateral pleural effusions . Mild bibasilar atelectasis .