Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest provided . Emphysematous changes . A rounded eggshell calcification projects over the left lung apex . No pleural effusion or pneumothorax . Hilar and cardiomediastinal contours are normal .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Emphysematous changes . 3 . An eggshell calcification of uncertain exact location ( superficial vs deep ) projects over the left lung apex . A PA and lateral may be helpful for localization .