Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs appear lucent compatible with known emphysema . There is no focal consolidation , large effusion or pneumothorax . Heart size is mildly enlarged . Mediastinal contour is unremarkable . Bony structures are intact
    OUTPUT:
    
Emphysema without superimposed acute process . Mild cardiomegaly .