Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment of the chest is limited by patient rotation . Heart size remains moderately enlarged . The aorta is tortuous and calcified . Large right thyroid goiter displaces the trachea to the left . Pulmonary vasculature is not engorged . The lungs are hyperinflated suggestive of COPD . Minimal blunting of the costophrenic angle posteriorly on the left is compatible with a small pleural effusion , not substantially changed in the interval . There is improved aeration of the left lung base with minimal streaky and linear opacities , likely atelectasis . No new focal consolidation or pneumothorax is present . Mild degenerative changes are seen in the imaged thoracic spine . A percutaneous gastrostomy catheter is noted in the left upper quadrant of the abdomen .
    OUTPUT:
    
Small left pleural effusion with improved atelectasis in the left lung base . COPD .