Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The study is limited as the patient has a right arm is overlying the lower chest . Lungs are clear and the heart size and mediastinal contours are normal . No obvious bony injury to the chest cage .
    OUTPUT:
    
Limited portable supine chest radiograph demonstrating no obvious injury to the chest , however CT is more sensitive for traumatic injuries .