Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable cardiomediastinal and hilar contours . No atherosclerotic calcifications are noted within the aortic arch . Lungs are hyperexpanded but clear . Airways are well calcified . No pleural effusion or pneumothorax evident . Mild mid thoracic central vertebral compression deformities . Anterior osteophyte formation evident . No displaced rib fractures identified . Incompletely assessed deformity of the left humeral head likely reflects prior trauma .
    OUTPUT:
    
No acute process .