Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , consistent with COPD . Probable mild cardiomegaly . Slight upper zone redistribution , but no overt CHF . There is dense confluent opacity at the left base laterally , with obscuration of the lateral aspect of the hemidiaphragm and left costophrenic angle . There is also small area of patchy opacification at the right base , laterally Lateral view shows small posterior pleural effusion , probably on the left . 4 mm nodule projecting over the retrosternal clear space on the lateral view appears new compared with chest x-rays from ___ and which may be followed up with a chest CT .
    OUTPUT:
    
1 . Dense opacity at the left base lateral , probably with an associated small effusion . The appearance is compatible with pneumonia . Some of this opacification appears nodular , and should be followed up with a chest CT or a repeat chest radiograph in ___ weeks to ensure resolution . 2 . Small focus of patchy opacification at the right base lateral , this is similar to ___ and could represent an area of focal scarring . Attention to this area on followup films is requested . 3 . 4 mm nodule projecting over the retrosternal clear space , new compared with ___ , which should be followed up with a chest CT . 4 . Hyperinflated lungs , consistent with COPD 5 . Mild cardiomegaly . No overt CHF .