Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild hyperexpansion of lungs is consistent with chronic pulmonary disease . New lower lobe opacity is best seen on lateral view . Unable to determine which side . No pleural effusion or pneumothorax . Persistent mild cardiomegaly . Mediastinal contour and hila are otherwise unremarkable . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Lower lobe pneumonia , indeterminate side .