Are 8 X-Rays Safe? Radiation Risks and Safety - Radiology

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Radiation Issues from Eight X-rays


Recently, I had an ankle sprain and underwent two X-rays in the emergency department.
Two days later, I had two more X-rays in the morning at the outpatient clinic, and in the afternoon, I took my child, who was injured, for about four X-rays of the left arm.
I was wearing a lead apron.
I would like to know if having these eight X-rays recently could have any adverse effects.
Thank you for your response.

Xiao Chen, 30~39 year old female. Ask Date: 2022/03/02

Dr. Wang Yifen reply Radiology


Hello, general diagnostic X-ray examinations involve low-dose radiation exposure.
The radiation dose from a single X-ray of the limbs is approximately 0.001 millisieverts, and the radiation from eight limb X-rays is lower than the dose of 0.09 millisieverts received from a round trip to the West Coast of the United States.
Following your doctor's advice to undergo radiation-related examinations is based on the consideration that the health benefits outweigh the effects of radiation.
If you have concerns, it is recommended to communicate with your physician before proceeding with the examination.
Do not avoid tests out of fear of radiation, as this could lead to missing critical treatment opportunities for diseases.
Please take this into consideration, and I wish you safety and good health.

Reply Date: 2022/03/02

More Info


When it comes to the safety of X-ray imaging, particularly after undergoing multiple X-ray examinations in a short period, it is essential to understand the associated radiation risks and how they relate to your health.
X-rays are a form of ionizing radiation, which means they have enough energy to remove tightly bound electrons from atoms, potentially leading to cellular damage. However, the amount of radiation exposure from a single X-ray is relatively low. For instance, a standard chest X-ray typically exposes a person to about 0.1 to 0.2 millisieverts (mSv) of radiation, while a single X-ray of a limb may expose you to even less, around 0.01 to 0.1 mSv.
In your case, you mentioned having a total of 8 X-rays within a short timeframe. To put this into perspective, the cumulative dose from 8 X-rays could range from approximately 0.08 mSv to 1.6 mSv, depending on the type of X-rays taken. For context, the average person is exposed to about 3 mSv of background radiation from natural sources each year, which includes cosmic rays, radon gas, and terrestrial radiation.
The potential health risks associated with radiation exposure from X-rays can be categorized into two main types: deterministic effects and stochastic effects. Deterministic effects occur when a certain threshold of radiation exposure is exceeded, leading to immediate health issues such as skin burns or radiation sickness. However, the doses from medical X-rays are typically far below these thresholds. Stochastic effects, on the other hand, refer to the long-term risk of developing cancer or genetic mutations due to radiation exposure. The risk of these effects increases with the amount of radiation received, but the risk from low doses, such as those from X-rays, is considered to be very low.

In your situation, having undergone 8 X-rays in a short period is unlikely to pose a significant health risk, especially since the doses are low and you were wearing a lead apron, which helps protect sensitive organs from unnecessary exposure. The American College of Radiology and the Radiological Society of North America emphasize that the benefits of obtaining necessary diagnostic information from X-rays generally outweigh the risks associated with the radiation exposure.

It is also important to note that the body does not retain radiation; rather, it is absorbed and then dissipated. The radiation dose you receive from an X-ray does not accumulate in your body over time. Each exposure is treated independently in terms of risk assessment.

If you have concerns about the number of X-rays or any potential long-term effects, it is advisable to discuss these with your healthcare provider. They can provide personalized advice based on your medical history and the necessity of the imaging performed. Additionally, if you find yourself needing frequent imaging, it may be beneficial to explore alternative diagnostic methods that do not involve radiation, such as ultrasound or MRI, depending on the clinical situation.

In summary, while it is always prudent to be aware of radiation exposure, the number of X-rays you have had recently is unlikely to result in any significant adverse effects. Maintaining open communication with your healthcare provider about your imaging needs and any concerns you may have is key to ensuring your health and safety.

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