Radiation Hazards

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Can radiations from PET and CT scan affect other family members?

Query: Hello doctor, Over two years ago my eldest son was diagnosed with lymphoma. He had PET scans and CT scans. These started at the end of my last pregnancy and went on while my son was a newborn and infant. I do not remember him holding the baby, but he came home from scans and was around him. They...  Read Full »


Dr. Vivek Chail

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

Answer: Hi, Welcome to icliniq.com. I have read through your query in detail. Please find my observations below. Your baby is totally safe. There is radiation risk only when doing PET and CT scans. The risk is only to the patient, which means your eldest son in your case. Your newborn was never exposed to ...  Read Full »

What is NCCT?

Query: Hi doctor, What is NCCT scan? Does it have any side effect?  Read Full »


Dr. Sagar Ramesh Makode

Cardiologist, General Medicine Physician, Internal Medicine Physician, Family Physician, General Practitioner

Answer: Hello, Welcome to icliniq.com. NCCT is a non-contrast computerised tomography. It is just a higher version of x-ray. It is like multiple x-rays taken of your body part to construct a better image than the x-ray. Single scan has no side effects. However, if multiple scans are being done, then there ...  Read Full »

Does the natural background radiation level add to cancer risk on top of a dose from medical imaging?

Query: Hello doctor, Does the natural background radiation level (3 mS v per year) add to cancer risk on top of a dose from medical imaging, or is natural radiation separate or safe since we all receive it?  Read Full »


Dr. Andrew Chellakumar Fenn

Radiotherapist, Radiation Oncologist

Answer: Hello, Welcome to icliniq.com. One mSv is the limit for the general public. The background is usually within this limit. But radiation workers have a limit of 20 mSv per year, which is also very safe. Also, doses from medical imaging can contribute. But the benefits from medical imaging offset any...  Read Full »

Does radiation exposure during x-ray cause cancer?

Query: Hi doctor, I am an 18 year old male. I am obese with weight more than 130 kg. I got plenty of tests done in a single year. Last year, I got my CT scan of full abdomen followed by five chest x-rays. One CT scan of the brain plain and bone densitometry (DEXA) scan in June and a CT PNS yesterday. Now ...  Read Full »


Dr. Indu Bhushan Kumar

Radiodiagnosis Physician

Answer: Hi, Welcome to icliniq.com. X-ray and CT scan uses ionizing radiation. Though these are harmful rays, in diagnostic radiology it is generally safe for the patients. Though you have undergone many investigations it is well below the maximum allowable safe dose for the patient. Amount of radiation...  Read Full »

Can a CT scan of the pelvis affect my eggs?

Query: Hello doctor, I had a lower GI and pelvic CT scan with contrast done at the age of 36 years. I fly a lot. I want kids. Did this scan harm my eggs or increase my chances of developing cancer? Nothing was found in the scan, and the MSV was 8.  Read Full »


Dr. Vivek Chail

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

Answer: Hi, Welcome to icliniq.com. I have read through your query in detail. Please find my observations below. The contrast CT scan pelvis has exposed you to radiation of 8 mSv as recorded on the machine. For a 36 year old female patient, this means you are exposed to an additional cancer risk of 0.09 ...  Read Full »

How to calculate the radiation dose from three scout scans?

Query: Hello doctor, I had a CT scan of the chest and abdomen. What is odd about this scan is that the technician did three scout scans before the final helical scan, which made me uncomfortable because I do not know how much radiation I received in those scans. When I got the CD, I looked at the dose repo...  Read Full »


Dr. Vivek Chail

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

Answer: Hello, Welcome to icliniq.com. I have seen the reports (attachment removed to protect patient identity). From calculations, the total radiation dose received by you during the CT scan is likely 10 mSv. Please note that scout images give low dose and three scout images will not significantly increas...  Read Full »

What is the safety limit for CT scans?

Query: Hi, I am a 31 year old male. I would like to know how many CTscans - abdomen and pelvis are safe in a 2 months time. I have had CT scan abdomen and pelvis 2 months back in another city, but now a doctor here wants it done again as I do not have the reports. Is it safe? What is the safety limit for ...  Read Full »


Dr. Vivek Chail

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

Answer: Hi, Welcome to icliniq.com. Every CT scan abdomen and pelvis will give you a radiation exposure of approximately 14 mSv which means it gives a risk of 0.16 percent to develop cancer. This means 99.86 percent chance that it will not cause cancer. If you get another CT scan abdomen and pelvis done now...  Read Full »

Will I get cancer as a result of CT scan?

Query: Hi doctor, I am a 50 year old male. My height is 5'11" and weight is 170 lbs. I do not have any major health issue, but my brother and mother had recently come down with leukemia. Recently had a CT scan of the abdomen and pelvis repeated with and without contrast material. Before four years, I also ...  Read Full »


Dr. Vivek Chail

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

Answer: Hi, Welcome to icliniq.com. The recent computed tomography (CT) scan of abdomen and pelvis has a radiation dose of 12.366 mSv which means it is causing an additional cancer risk of 0.06 percent. This is quite low and not a reason to get worried. The radiation dose from the three CT scans for kidney ...  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

Diabetologist, General Medicine Physician, Internal Medicine Physician, Toxicologist

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 »

According to NCRP guidelines, why is maximum radiation exposure high for hospital workers?

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

Family Physician, General Practitioner, Radiodiagnosis Physician, Radiologist

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 »

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