Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate hyperexpanded lungs . There is a veil like opacity at the left lower lung which could reflect atelectasis , effusion or scarring . There is a more focal hyperdensity which projects over the posterior thorax and lower thoracic spine , of uncertain clinical significance . Cardiomediastinal and hilar contours are unremarkable . There is no pneumothorax .
    OUTPUT:
    
1 . No evidence of widened mediastinum or cardiomegaly . 2 . Left basilar opacity which could reflect atelectasis , effusion , or scarring . 3 . There is a hyperdensity which projects over the posterior thorax and lower thoracic spine , of uncertain clinical significance . Recommend a non-emergent CT of the chest for additional evaluation . 4 . Hyperexpanded lungs consistent with emphysema .