Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are within normal limits and without change . Prominent calcifications of the aortic knob have a stable radiographic appearance . Lungs remain clear , and there are no pleural effusions or concerning acute skeletal findings .
    OUTPUT:
    
No radiographic findings to account for hemoptysis . If symptoms persist , consider CT of the chest to exclude a radiographically occult cause for this symptom .