Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal radiograph of the chest demonstrate hyperexpansion of the lungs consistent with COPD . There is an area of increased opacification at the right lung base , obscuring the right heart border concerning for atelectasis or developing infectious process in the right middle lobe . There is plate - like atelectasis of the left lower lung . The cardio mediastinal air and hilar contours are unchanged . There is tortuosity of the descending aorta . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
There is increased opacification of the right lower lung obscuring the right heart border , concerning for atelectasis or right middle lobe pneumonia .