Xiao Jing recently had an X-ray at the hospital due to lumbar issues. However, last week she discovered she was already two weeks pregnant. Overwhelmed with both joy and anxiety, she recalled online claims that X-rays emit radiation linked to cancer and potential fetal abnormalities. This left her unsure what to do—could she keep the baby?
Can X-rays harm the human body?
X-ray examinations are widely used in clinical diagnostics. Compared to CT scans, ultrasounds, and other imaging methods, X-rays offer advantages such as high diagnostic value, quick examination times, low cost, and ease of operation. X-rays are a type of electromagnetic wave invisible to the human eye. With their short wavelength and strong penetrating power, different human tissues appear as varying shades of density on X-ray films when exposed to this radiation.
Some individuals harbor significant fears about X-ray-related examinations, worrying that radiation may harm their bodies. However, it is important to clarify that medical X-ray examinations and computed tomography (CT) scans are currently two widely used methods for early cancer detection and bone fracture diagnosis.
A panel of experts from the U.S. National Research Council (NRC) stated in a June 29, 2005 report that while most medical X-ray exposures carry a potential risk of cancer, this risk is generally low.
The latest findings indicate that a radiation dose equivalent to approximately 100 chest X-rays (around 100 mSv) would cause cancer in only 1 out of 100 people. In contrast, the average radiation exposure from a simple chest X-ray (two views) is merely 0.01 mSv—far below levels associated with carcinogenesis.
What if you discover you're pregnant after an X-ray? Should you keep the baby?
The International Commission on Radiological Protection (ICRP) Publication 90 reviewed newly published animal studies on prenatal exposure and reassessed data on the biological effects of radiation on human embryos and fetuses. It concluded that within the range of absorbed doses below approximately 100 mGy, major fetal organs and tissues do not exhibit clinically detectable functional impairment.
Radiation risk is highest during organogenesis and early fetal development, slightly lower during mid-pregnancy, and lowest in late pregnancy.
In other words, if a woman receives X-ray exposure exceeding 10 rads within the first two weeks of pregnancy, it may kill the embryo. However, if the fetus survives, the radiation typically does not cause harm. Radiation-induced malformations primarily occur during major organ formation.
Furthermore, a single X-ray examination rarely delivers an ionizing radiation dose exceeding 50 mGy. To date, there are no documented cases of fetal malformations, growth restriction, or miscarriage resulting from radiation doses below 50 mGy, confirming that a single X-ray poses minimal risk to the fetus.
Therefore, for fetal doses below 100 mGy, medical exposure to radiation cannot be considered a valid reason for terminating the pregnancy; the child can be carried to term.
Can children undergo X-rays?
Children exhibit heightened sensitivity to X-rays, with ionizing radiation posing corresponding potential risks. Clinically, scientifically sound chest X-ray protocols should be employed for pediatric patients to enhance protection and effectively prevent radiation-induced injury.Traditional X-ray machines often produce blurred images due to prolonged exposure times. Digital Radiography (DR), however, offers significant advantages. For instance, PHILIPS DR systems can reach up to 900mA, reducing pediatric chest exposure time to as little as 0.007 seconds. Immediately after exposure, the computer automatically processes the image digitally, displaying it on the monitor within 4 seconds. Radiologic technologists can then instantly assess whether the image meets diagnostic requirements.Not only is it fast and cost-effective, but it also delivers low radiation doses, making it ideal for pediatric X-ray examinations.
What precautions should be taken for X-ray examinations?
X-ray examinations have become a common diagnostic tool in hospitals and a mandatory component of annual health checkups for many citizens. What should one be mindful of during this procedure?
The thyroid, thymus, and gonads are highly radiation-sensitive organs requiring protection during X-ray examinations.
For adult patients undergoing X-ray examinations:
Thoroughly assess the patient's condition before proceeding. Avoid unnecessary X-rays whenever possible.Pregnant women and young children should avoid abdominal and pelvic X-rays whenever possible. If such examinations are essential, implement protective measures—shielding is most effective—with particular attention to protecting the gonads, active bone marrow, and mammary glands.
Additionally, accompanying family members should wait outside the examination room and refrain from entering or exiting without authorization.
Summary: Since its discovery, X-ray technology has demonstrated significant value in medical diagnostics, earning widespread recognition from healthcare professionals and patients alike. While benefiting humanity, the application of radiological techniques carries inherent risks. Without proper protective measures, radiation exposure may cause harm.
Therefore, prioritizing patient protection during examinations and minimizing unnecessary exposure is crucial. This approach helps prevent or reduce potential hazards to the public and future generations, significantly enhancing the effectiveness of X-ray diagnostics.