Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is mildly enlarged . Mediastinal contour is unchanged with unfolding of the thoracic aorta again noted . Bronchovascular crowding is a result of low lung volumes , but no pulmonary edema is present . Patchy opacities in the lung bases are most likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormality is noted .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .