Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest showed normal lung volumes . There is no pleural effusion . Hilar and mediastinal silhouettes are unremarkable . There is no evidence of mediastinal widening . Heart size is normal . There is no pulmonary edema . Aortic arch calcifications are noted . Apical opacities , right greater than left progressed since ___ exam , likely scarring . Severe right acromioclavicular joint osteoarthritis is noted . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Normal mediastinal contour . No evidence for pneumonia .