Radiology Oncology

CT scans use low doses of radiation to create detailed images. While repeated exposure to radiation can increase the risk of cancer, the risk from a single CT scan is extremely low. Scans are only recommended by doctors when medically necessary, and the benefits far outweigh the risks.

• CT scan uses X-rays to give quick, detailed images of bones, organs, and blood vessels.
• MRI uses magnetic fields and is better for soft tissues like the brain, spine, or joints.

  CT is faster; MRI gives more detailed images but takes longer.

A CT scan shows body structure, size, and shape. A PET-CT scan shows both structure and function – like how fast a tumor is growing or spreading, making it more useful for staging and monitoring cancer.

Yes, if advised by your doctor. The number of scans is carefully planned to ensure that exposure is kept to a minimum and only done when necessary for diagnosis or follow-up.

You may be asked to fast for 4–6 hours, avoid sugary foods, and drink water. In some cases, medications or contrast dyes are used. Always inform your doctor if you are diabetic, pregnant, or have kidney issues.

In some cases, a contrast dye is used to improve the visibility of certain areas. It is usually injected into a vein or given as a drink. Your doctor will advise based on your condition.

Most people have no reaction. Some may feel warm or flushed. Rarely, mild allergic reactions like itchiness or nausea may occur. Inform the radiology team if you have allergies.

Yes, PET scans can detect cancer cells earlier by observing metabolic activity. They are particularly helpful in spotting spread (metastasis) or checking response to treatment.

Yes. Scans like PET-CT or CT are often used after a few chemotherapy or radiation sessions to check if the tumor is shrinking or if the cancer has spread.

It depends on the type, stage, and treatment plan. Your doctor will decide the intervals for repeat imaging to monitor your health without unnecessary radiation exposure.

For PET-CT, you’ll usually be asked to avoid food for 4–6 hours, but can drink water. For regular CT or MRI, specific instructions will be shared based on the area being scanned.

• CT Scan: Usually takes 5–15 minutes.
• PET-CT Scan: Takes about 2–3 hours, including preparation, injection, and scanning.

No. The scans are painless. You will be asked to lie still during the scan. Some may feel slight discomfort from lying still or from the IV injection (if used).

Yes, sometimes very small tumors or certain cancer types may not be visible. That’s why imaging is combined with blood tests, biopsies, and physical exams for accurate diagnosis.

It’s a good idea to have someone with you, especially if you are receiving a contrast dye or have had a sedative. However, you can typically go home on your own afterward.

Yes, but doctors are cautious about radiation exposure, especially in children. The scan is only recommended if it offers essential diagnostic value.

Yes, but not always clearly. Some infections or inflammations can look like cancer on scans. That’s why doctors may recommend a biopsy if needed.

You can usually return to normal activities. Drink water to help flush out any dye. Your doctor will receive the scan report in 1–2 days and discuss the findings with you.

Yes. Your oncologist or radiologist will explain the results and how it affects your diagnosis or treatment plan.