Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no pleural effusion , pneumothorax or focal airspace consolidation . The cardiac and mediastinal contours are normal . The hilar structures are unremarkable . There is a rounded opacity projecting over the right low lung seen only on the frontal view suggesting localization to the chest wall or ribs , possibly an old rib fracture .
    OUTPUT:
    
No acute cardiopulmonary process .