Understanding Brachytherapy: How Internal Radiation Therapy Works
Last updated on 02 Jan 2026
Dr Saurabh Kumar, MBBS, MD (Radiation Oncology), explains that Brachytherapy also known as Internal Radiation Therapy, is a highly precise form of cancer treatment where a radiation source is placed inside or very close to the tumor. This technique allows doctors to deliver a high dose of radiation directly to the cancer site while minimising exposure to surrounding healthy tissues.
Unlike External Beam Radiation Therapy (EBRT), which sends radiation from outside the body, Brachytherapy delivers radiation internally. This makes it a powerful and targeted approach for treating cancers such as cervical, vaginal, and prostate cancer.
How Brachytherapy Works
There are different types of Brachytherapy, depending on the treatment site and technique. Dr Kumar explains that one common type is intracavitary brachytherapy, where a small cylinder is gently placed inside the vagina or a thin metal tube is inserted through the cervix. The patient is usually relaxed or under anesthesia to ensure comfort.
When done under sedation, the procedure is not painful. However, performing it without sedation may cause discomfort. In most cases, especially for vaginal brachytherapy, it’s an OPD (outpatient) procedure where the cylinder is inserted into the vagina, and only the upper part of the vaginal wall receives radiation.
Depending on the cancer type, HDR vs LDR Brachytherapy (High-Dose Rate vs Low-Dose Rate) may be chosen. HDR treatments are quick and done in short sessions, while LDR involves placing a low-intensity radiation source for a longer duration.
Is Brachytherapy Painful?
Patients often ask, “Is brachytherapy painful?” According to Dr Kumar, the procedure itself is generally painless when performed under sedation or anesthesia. Most discomfort, if any, occurs during device placement, which is brief and well-controlled with medication.
Recovery After Brachytherapy
Recovery after brachytherapy is usually fast. Patients are discharged the same day in most cases and can resume normal activities within 24–48 hours. Mild fatigue or local irritation may occur temporarily but is manageable with basic care.
Common brachytherapy side effects include mild vaginal soreness, spotting, or a temporary increase in urinary frequency. Long-term complications are rare with today’s modern techniques.
Brachytherapy vs External Beam Radiation
In comparing Brachytherapy vs External Beam Radiation, both are effective, but Brachytherapy provides highly localised radiation, reducing damage to surrounding organs. This is particularly beneficial for prostate and gynaecological cancers, where targeted radiation can preserve organ function and improve quality of life.
How Effective Is Brachytherapy and How Long Does Brachytherapy Take?
When patients ask, “How effective is brachytherapy?” Dr Kumar confirms that outcomes are excellent when performed by experienced oncologists. It provides high local control rates and significantly improves survival for many cancer types.
As for how long brachytherapy takes, the actual treatment session may last anywhere between 15 minutes to an hour, depending on the cancer site and whether HDR or LDR brachytherapy is used.
Cost of Brachytherapy Treatment
The cost of brachytherapy treatment varies depending on hospital facilities, technology, and the number of sessions required. It’s generally cost-effective compared to more prolonged external radiation schedules, given its precision and reduced side effects.
FAQS
1. How safe is brachytherapy for cancer treatment?
Brachytherapy is a safe and well-established cancer treatment with minimal risks when performed by qualified specialists.
2. Can I go home the same day after brachytherapy?
Yes, most patients can return home the same day as the procedure, depending on the type and duration of therapy.
3. What precautions should I take after internal radiation treatment?
Follow your doctor’s guidance on hygiene, rest, and follow-up visits. Avoid heavy lifting and sexual activity for a few days post-procedure if advised.
Conclusion
With advanced medical techniques and expert care from specialists like Dr. Saurabh Kumar, Brachytherapy has become one of the most effective and patient-friendly options in modern internal radiation treatment. It offers excellent outcomes, quicker recovery, and fewer side effects, making it a preferred choice for many cancers.
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Disclaimer: The information provided in this article is for general awareness and educational purposes only. It should not be taken as a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or a qualified healthcare provider with any questions regarding radiation therapy, cancer stage, or treatment options. Do not ignore professional advice or delay seeking care because of information presented here. While insights are shared by Dr Saurabh Kumar and are based on reliable medical sources, individual patient needs and outcomes may vary. MrMed does not endorse or promote any specific hospital, product, or treatment unless clearly stated.
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