Radiation Exposure

Radiation is an energy that is produced in the form of particles or waves. It is produced naturally by sunlight, and it is also produced by humans during X-rays, cancer treatments, and in nuclear facilities. Long-term exposure to a small amount of radiation causes gene mutations and increases the risk of developing cancer. Brief exposure for a longer period causes radiation sickness. The symptoms are nausea, skin burns, and reduced organ function. In severe cases, it leads to death.

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Are there any food that prevents DNA damage caused by CT radiation?

Query: Hello doctor,I am 29-years-old and in good health. My height is 6 feet and 1 inch, and I weigh 165 lbs. I just had a CT scan around my stomach for kidney stones. This is the second scan in the same area. The first was a 3.86 mSv dosage, and the second was a 3.26 mSv dosage. Should I be worried about...  Read Full »


Dr. Andrew Chellakumar Fenn

Answer: Hi, Welcome to icliniq.com. You do not worry about the radiation dose from regular computed tomography (CT) scans done to diagnose disease. You do not need to worry about CT scans done for diagnosis as these have benefits beyond any potential or perceived detrimental effects of radiation. The gene...  Read Full »

Should I be concerned about being exposed to a lot of radiation at the age of 65?

Query: Hi doctor, I have been experiencing pulsatile tinnitus for a year. I had a CTA of the brain with and without contrast, CT of the temporal bone, and an angiogram of the brain and neck. I went for another opinion, and my doctor suggested doing a CTV of the brain and redo temporal bone CT both with and...  Read Full »


Dr. Muhammad Shoyab

Answer: Hello, Welcome to icliniq.com. I understand your concern. It is quite natural to be concerned about radiation hazards, particularly when doing several scans consecutively. However, please be assured that the radiation of each scan is kept "as low as reasonably achievable" (ALARA) so that it does not...  Read Full »

I was indirectly exposed to radiation four times during a CT scan. Should I be worried?

Query: Hello doctor, A couple of days back, I had to take my aunt for a brain CT scan. The CT scan operator asked me to be in the room. They gave me an apron, but my arm and head got exposed. They asked me to hold her head steady, so I held her chin while she slid into the CT scanner. During this, my han...  Read Full »


Dr. Varun Chaudhry

Answer: Hello, Welcome to icliniq.com. CT (computed tomography) scan of the head has low radiation exposure. Although your head and hands were exposed, the lead apron would have reduced the total body dose. You said it was done four times, but I am unsure if the whole scan was done four times or just ...  Read Full »

What are the chances of getting cancer from having two CT scans in a month?

Query: Hello doctor, I am a 26 year old female. I am worried after reading about the effects of radiation from a CT scan. I had two separate scans within a month. Both the scans were for the chest, abdomen, and pelvis. The doctors were looking for a potential lymphoma, but nothing conclusive was found. I ...  Read Full »


Dr. Sugandh Garg

Answer: Hi, Welcome to icliniq.com. This kind of exposure to CT scan is not harmful, though you must avoid as much as possible. A continuous, long-term exposure daily may cause harmful radiation hazards and ill health. So, do not worry about the exposure. This very minimal exposure does not pose any fu...  Read Full »

I had CT scans and other X-rays done. Am I at a potential risk for cancer?

Query: Hello doctor, I am a 30-year-old female. I recently had a CT scan and other X-rays done. The CT scan was of my head and neck, including contrast dye. I also had a chest X-ray done and a few other X-rays taken by a chiropractor. Outside of the annual dental X-rays, I have not had any other X-rays, b...  Read Full »


Dr. Muhammad Shoyab

Answer: Hello, Welcome to icliniq.com. Thanks for writing in, and I understand your concern. I understand that your anxiety is due to having several radiology examinations, which you usually do not have. I have reviewed the dose report that you attached (attachments removed to protect the patient's identity...  Read Full »

I have had many CT scans of the temporal bone in the past three years. Is it a lot of radiation exposure?

Query: Hello doctor, Could you tell me how much radiation is there in a CT for temporal bone without contrast? Is it a lot of radiation? I have had many CT scans in the past three years for an autoimmune disease I have. Recently, I have been having issues with my ears. Is there a lot of radiation in CT of...  Read Full »


Dr. Vivek Chail

Answer: Hello, Welcome to icliniq.com. Thanks for writing in, and I understand your concern. A Computed tomography (CT) scan of the temporal bone without contrast involves approximately 0.8 mSv radiation dose in helical scanning and 1.21 mSv for sequential scanning. This is a small amount of radiation...  Read Full »

Why is the radiation exposure limit high for hospital workers than the public?

Query: Hello doctor, Why do the NCRP guidelines have the maximum exposure to x-rays radiation for hospital workers higher than the normal public? What does the hospital workers have, that makes them fine to get exposed to more radiations than the public?  Read Full »


Dr. Vivek Chail

Answer: Hi, Welcome to icliniq.com. Hospital workers are exposed to small doses of likely leaked radiation. The maximum exposure is based on a cumulative radiation dose limit for hospital workers, and this is a part of professional hazard during work. However, continuous improvement in radiation usage is he...  Read Full »

How to prevent damage to my eyes caused by radiotherapy for my nose cancer?

Query: Hi doctor,I have nose cancer, so I am going to get radiotherapy. The doctor said that the radiation might touch the eye, which may lead to loss of vision and eye removal. Is there any other way to prevent this? Please help.  Read Full »


Dr. Andrew Chellakumar Fenn

Answer: Hi, Welcome to icliniq.com. You have not given enough details, but from what I understand, you need to be given radiation to your nose. With conventional radiation, it is very difficult to save the eye, but we can try computerized radiation like IMRT (intensity-modulated radiation therapy) or VMAT (...  Read Full »

What are the effects of diagnostic radiation exposure in a human body?

Query: Hi doctor, I just had a CTA of the brain and neck. So I had multidetector volumetric CT acquisition of head from skull base to the vertex, which produced axial, coronal, and sagittal images. The intravenous multidetector CT angiography of the aortic arch to vertex was obtained. I was in the CT scan...  Read Full »


Dr. Varun Chaudhry

Answer: Hi, Welcome to icliniq.com. Thanks for your query, and I hope you are doing well. A CT (computed tomography) angiogram of the head and neck is a lengthy procedure as we have to plan the pre and post-contrast sequences from upper chest to vertex. Usually, the radiation dose is 6 to 10 mSv (mSv is m...  Read Full »

My wife did a mammogram without knowing that she is pregnant. Kindly suggest.

Query: Hi doctor, My wife had a mammography test last month. It was around 26 days after LMP. She did not get her periods then. Now, after a month of mammography, her doctor has confirmed that she is pregnant. Please suggest.  Read Full »


Dr. Shravana Kumar Chinnikatti

Answer: Hi, Welcome to icliniq.com. Mammogram delivers less dose and fetus will be far away from the radiation field. However, a close follow-up with ultrasound of the fetus and obstetrician is necessary. For further information consult a radiation oncologist online --> https://www.icliniq.com/ask-a-doc...  Read Full »

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