Final answer:
It is false that a parent should hold a child during an X-ray; this task must be performed by a qualified professional due to the risks of X-ray exposure. Ultrasounds are safest during pregnancy, and X-rays are used over radio waves for imaging bones due to their higher penetrating energy.
Step-by-step explanation:
The statement "A parent, rather than a professional radiographer, should hold a child in position for an x-ray examination." is false. Although parents can provide comfort to their child during medical procedures, the risks associated with X-ray exposure mean that qualified professionals should always be the ones to hold the child if necessary during an X-ray exam. These professionals are trained to minimize their own exposure to radiation and they use protective equipment to shield themselves and the patient from unnecessary exposure. Overexposure to X-rays can potentially lead to cancer, which is why safety protocols are strictly followed.
When considering imaging studies during pregnancy, ultrasounds are considered the safest option. Compared to options like CT scans, PET scans, and X-rays, ultrasounds do not use ionizing radiation, which can be harmful to the developing fetus.
Moreover, the reason that X-rays rather than radio waves are used in imaging of broken bones is because X-rays have higher penetrating energy than radio waves, allowing them to provide clear images of the internal structure of bones.