Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrate unremarkable cardiomediastinal and hilar contours . Mitral annular calcfication is seen best on lateral view . 8 mm nodular opacification projecting over the posterior ninth rib corresponds with nipple . Lungs are clear . No pleural effusion or pneumothorax .
    OUTPUT:
    
No acute process .