Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild hyperexpansion of the lungs could represent chronic pulmonary disease . Within the right upper lobe there is a 12 mm nodular opacity projecting at the level of the third rib anteriorly . The remainder of the lungs are clear . The cardiomediastinal silhouette is unchanged . No pleural effusions .
    OUTPUT:
    
Right upper lobe nodular opacity that could represent pulmonary nodules versus focal infection .