Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . Lungs are clear . Pulmonary vasculature is normal . Mediastinal and hilar structures are normal . Pleural surfaces are normal . Rounded density overlying the right hemidiaphragm is likely a nipple shadow , however conventional radiograph with nipple markers is recommended when patient is stable . Old healed fracture is noted in the lateral right fourth rib . Calcific density in the left neck is likely vascular calcifications in the internal carotid artery versus a calcified node .
    OUTPUT:
    
1 . No pneumonia . 2 . Right lower lung rounded density , likely a nipple shadow . However , conventional radiograph with nipple markers is recommended when patient is stable . 3 . Probable internal carotid artery dense calcification .