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Radiation therapy is one of the most widely used and effective treatments for cancer. It uses high-energy rays or particles to target and destroy cancer cells while protecting surrounding healthy tissues as much as possible. For many patients, the first questions that come to mind are: How long will radiation therapy take? What should I expect during and after the treatment?
This blog explains the timeframe, process, and expectations of radiation therapy, helping patients feel more confident and informed about their treatment journey.
The duration of radiation therapy depends on several factors, including:
Type of cancer being treated
Stage of the disease
Treatment goals (curative, palliative, or supportive)
Radiation technique used (external beam radiation, brachytherapy, etc.)
External Beam Radiation Therapy (EBRT): Usually given 5 days a week for 1–8 weeks. Each session typically lasts 10–30 minutes, but the actual radiation exposure may be just a few minutes.
Brachytherapy (internal radiation): May be delivered in shorter, more intensive sessions, often lasting from a few minutes to an hour, depending on the case.
Stereotactic Radiosurgery (SRS) or Stereotactic Body Radiotherapy (SBRT): Advanced forms of radiation that can be completed in 1–5 sessions.
So, while the treatment plan may last weeks, the individual sessions are relatively short.
Before starting radiation, patients undergo a simulation process. This includes imaging scans (CT, MRI, or PET) to map the exact area to be treated. Customized immobilization devices may be used to help you remain still during sessions.
You will lie on a treatment table while a machine delivers radiation beams to the targeted area.
The process is painless – you won’t feel the radiation itself.
Each session usually takes 15–30 minutes, including setup and positioning.
Radiation therapy can cause some short-term side effects, such as:
Fatigue
Skin irritation or redness
Hair loss in the treated area
Mild nausea or digestive changes (depending on the treatment site)
Long-term side effects are less common today due to advanced technologies that minimize exposure to healthy tissues.
Follow your doctor’s instructions carefully regarding skincare, rest, and diet.
Stay hydrated and maintain a balanced diet to help the body heal.
Keep up with gentle physical activity to reduce fatigue.
Report any unusual side effects to your oncologist immediately.
When it comes to cancer treatment, expertise and compassionate care make all the difference. Dr. Sumant Gupta is a leading oncologist, hematologist, and bone marrow transplant specialist at Metro Hospital, Faridabad. With years of experience and advanced training, he is recognized as one of the best cancer doctors in Faridabad.
✅ Specialises in oncology, hematology, and bone marrow transplantation (BMT)
✅ Provides personalised treatment plans tailored to each patient’s condition
✅ Expertise in radiation therapy guidance, chemotherapy, immunotherapy, and targeted therapies
✅ Known for his patient-centric approach, compassionate care, and clinical excellence
📍 Book an Appointment Today
📞 Call: +91 981 862 8242
🌐 Visit: drsumantgupta.com
Radiation therapy is a crucial step in cancer care, and understanding the duration and process helps reduce fear and anxiety. While treatment may span weeks, each session is quick, painless, and highly effective in controlling cancer.
With the guidance of a trusted specialist like Dr. Sumant Gupta – the best cancer doctor in Faridabad, patients can navigate radiation therapy with confidence, support, and expert care.
