CT (Computed Tomography) scans are one of the greatest advancements in medical diagnostics. They allow us to view internal organs and detect problems deep within the body without surgery, using high-resolution computer imaging. This makes them an invaluable tool for early disease detection — especially in cases where symptoms may not yet be visible.
https://www.vikatan.com/health/can-ct-scans-lead-to-cancer-doctor-explains
A Recent Study That Sparked Concern
A recent study published in JAMA Internal Medicine, conducted in the U.S. and U.K., claimed that 94% of people who undergo CT scans may be at risk of developing cancer in the future. This alarming statistic raised anxiety, especially among those who have already undergone CT scans, either personally or within their families.
So the question naturally arises:
“If I’ve had a CT scan, am I going to get cancer?”
Expert Insight from Dr. N. Rajesh Kar, Clinical Oncologist
Dr. Rajesh Kar, a radiation oncology expert, offers important clarity:
“CT scans work by emitting a type of ionizing radiation — kilovolt (kV) X-rays — which pass through the body to produce images of internal structures. However, CT scans are only recommended by doctors when medically necessary. You cannot get a CT scan from any center without a valid medical referral.”
He continues:
“While it is true that exposure to radiation carries a potential risk of causing cellular changes, that does not mean everyone who gets a CT scan will develop cancer. The risk depends on many factors — including the type and dose of radiation, the patient’s age, and how frequently the scans are done.”
What is RATRAN?
The study that raised these concerns used a computational model called RATRAN, which simulates radiation exposure and cellular responses. It estimates what types of cancers might arise from different levels of radiation exposure.
Important to note: RATRAN does not predict guaranteed outcomes, but theoretical possibilities based on simulations.
So, just because a scan shows some risk, that does not mean cancer will definitely develop.
What About Children?
Dr. Rajesh emphasizes:
“We never recommend CT scans or radiation-based treatments for children unless absolutely necessary. Children’s cells are more sensitive to radiation, and their long-term risk is higher.”
“Only in life-threatening, unavoidable situations where the child’s life or well-being is at risk do we recommend a CT scan. Even then, we use the lowest possible radiation dose, and often the body can recover and repair any minor cell damage over time.”
If issues occur in bone tissue, healing may take longer — but the risk of cancer still remains very low if the scan is done responsibly under medical guidance.
Don’t Panic — Stay Informed
There’s no need to be afraid of the study’s results. It was based on software simulations and referred only to possibilities, not certainties. The takeaway should not be fear, but awareness and responsibility.
If a CT scan is needed:
- Make sure it is prescribed by a qualified doctor
- Maintain an appropriate time interval between multiple scans
- Avoid unnecessary scans or self-referrals
Final Words by Dr. Rajesh Kar:
“Radiation is like a double-edged sword. The same high-energy rays that might cause changes in cells are also used in radiation therapy to treat cancer. What matters is the dosage, medical need, and expert supervision.”
Key Takeaways:
- CT scans are extremely useful and generally safe when used appropriately
- Risks are very low when scans are done only when necessary
- Children are more sensitive, so special caution is taken
- RATRAN software predicts potential, not certainty
- Always consult a medical expert before undergoing any imaging involving radiation