X-Ray Radiation Exposure: Risks of Repeated Imaging

Repeated exposure to X-ray radiation in the same area?

Hello Dr.
Wang, I went to a large hospital to see an orthopedic specialist due to pain in my lower back on the right side.
I had X-rays taken of my thoracic spine (front or back?) and lumbar spine on the same day.
I also had two X-rays taken of the same areas at a nearby clinic for convenience during rehabilitation.
At the time, I didn't consider the issue of radiation exposure, and I regret it now.
I would like to ask you: 1.
Is there a significant problem with having repeated X-rays of the same area on the same day? (I found that the radiation dose for the lumbar spine is 1.5 millisieverts and for the thoracic spine is 1 millisievert; I’m not sure if this is correct.) 2.
Additionally, I take corticosteroids for a skin condition in the morning and evening; does this have a significant impact? 3.
Furthermore, that night when I returned home, I felt a bit dizzy, had no appetite, and felt nauseous.
Could this be related to receiving too much radiation at once? Thank you, doctor!

tracy, 20~29 year old female. Ask Date: 2021/02/08

Dr. Wang Yifen reply Radiology

Hello, according to the International Commission on Radiological Protection (ICRP) report 103, a dose below 100 millisieverts (including single or multiple exposures) does not cause clinical functional impairment.
The radiation dose from the examination you mentioned is within a reasonable range.
Additionally, the medications or symptoms you described are not related to the X-ray examination.
If the abnormal symptoms do not improve, it is recommended to consult a relevant specialist for an evaluation of potential causes.
For more information on radiation, you can refer to the convenience section of the Atomic Energy Council of the Executive Yuan at the following link: https://www.aec.gov.tw/.
Please take this into consideration, and I wish you peace and good health.

Reply Date: 2021/02/08

More Info

When it comes to X-ray radiation exposure, especially in the context of repeated imaging on the same day, it is essential to understand both the risks and the safety measures in place to mitigate those risks. Let's break down your concerns regarding the X-ray exposure you experienced.

1. Repeated X-ray Imaging Risks: X-rays are a form of ionizing radiation, which means they have enough energy to remove tightly bound electrons from atoms, potentially causing cellular damage. However, the amount of radiation exposure from a single X-ray is relatively low. For instance, a typical chest X-ray exposes a person to about 0.1 mSv (millisieverts), while a lumbar spine X-ray can expose a person to about 1.5 mSv. The cumulative effect of multiple X-rays in a short period can increase the risk of radiation-related health issues, but the risk is generally considered low for the levels of exposure you mentioned. The effective dose from two lumbar X-rays and one chest X-ray on the same day would likely be within a range that is not considered dangerous for most individuals. However, it is always advisable to minimize unnecessary exposure and discuss with your healthcare provider the necessity of each imaging study.

2. Impact of Steroid Use: You mentioned that you are taking corticosteroids for a skin condition. While corticosteroids themselves do not significantly increase the risks associated with X-ray exposure, they can affect your overall health, particularly your immune system. Long-term use of corticosteroids can lead to various side effects, including increased susceptibility to infections and potential impacts on bone health. However, they do not directly increase the risks associated with radiation exposure from X-rays.

3. Symptoms After X-ray Exposure: Feeling dizzy, having a lack of appetite, and experiencing nausea after receiving multiple X-rays could be attributed to several factors, but they are unlikely to be directly caused by the radiation exposure itself. It is essential to consider other potential causes, such as anxiety about the procedure, dehydration, or even a reaction to medications you may be taking. If these symptoms persist, it would be wise to consult a healthcare professional to rule out other underlying issues.

In summary, while repeated X-ray imaging in a single day can increase radiation exposure, the levels you described are generally considered safe for most individuals. It is crucial to communicate with your healthcare provider about any concerns regarding imaging studies and to ensure that all imaging is necessary for your diagnosis and treatment. If you have ongoing symptoms or concerns about your health, do not hesitate to seek further medical advice. Regular follow-ups and open communication with your healthcare team can help manage any potential risks associated with your treatment and imaging needs.

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