Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable with the exception of mild aortic knob calcifications . The heart size is normal . Lungs are clear . No pleural effusion or pneumothorax . No pulmonary vascular congestion . No acute osseous abnormalities are detected .
    OUTPUT:
    
No acute cardiopulmonary process .