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Radiotherapy planning overview
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Radiotherapy planning is the careful process that your healthcare team uses to design and prepare your radiation treatment. It involves imaging scans, computer calculations, and teamwork between doctors (including surgeons and radiation oncologists) to make sure the radiation targets the cancer accurately while sparing healthy tissue. This planning happens before your actual radiation sessions begin.
Key facts
Yes, radiotherapy planning is a standard step for anyone receiving radiation therapy. It is a routine part of cancer care for many types of tumours.
Radiotherapy planning affects people of all ages who have been diagnosed with cancer and are recommended to have radiation treatment. It is relevant for both early-stage and advanced cancers.
Radiotherapy planning is not a diagnosis but a preparation step. Your cancer diagnosis is established first through biopsies and imaging. The planning process then uses that information to design your treatment.
During planning, you will have a scan while lying on a flat table. The team may make small marks on your skin (tattoo dots) to help line up the radiation beams each day. The appointment usually lasts 30–60 minutes. Afterwards, the team uses special computer programs to design your radiation beams. You are not treated during this session.
Radiotherapy planning itself is not a treatment but the preparatory phase. The actual treatment – radiation therapy – starts after planning is complete. The planning ensures the treatment is precise and safe.
Radiotherapy planning may involve medications to help you relax or to reduce discomfort during scans (for example, mild sedation for children or anxious adults). Contrast dye may be given through a vein to improve scan images. No specific drug names or doses are used in this description.
During the planning phase, you can continue your normal daily activities. There are no restrictions unless you have other health issues. You may need to visit the hospital for one or two planning appointments over 1–2 weeks.
Eat a healthy diet with plenty of fruits, vegetables, and protein to support your body during treatment. Gentle exercise like walking or stretching can help maintain your strength and mood. Talk to your doctor before starting new physical activities.
Planning for radiotherapy can cause anxiety or worry about the treatment ahead. It is normal to feel this way. Your healthcare team can offer support, or you may benefit from speaking with a counsellor or psychologist. Remember, you are not alone – many people feel the same.
Radiotherapy planning is not something that can be prevented – it is a necessary part of cancer treatment. However, a well-designed plan can help prevent future side effects by sparing healthy tissues.
No vaccines are related to radiotherapy planning. However, you may be advised to get annual flu and COVID-19 vaccines to protect your immune system during cancer treatment.
Regular cancer screening (like mammograms, colonoscopies, or Pap tests) can detect cancers early, which may lead to simpler treatment planning. If you are at risk, discuss screening with your doctor.
For the vast majority of people, radiotherapy planning is a smooth, well-tolerated process that leads to effective treatment. Modern planning techniques are very precise, which lowers the chance of serious side effects. Most people complete planning without any problems and go on to have successful radiotherapy. Your team is there to guide you every step of the way.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 9, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Your surgeon may be involved in radiotherapy planning if you are having radiation before or after surgery. For example, in some cancers, the surgeon marks the tumour bed with clips during surgery, which helps the radiation team target the right area. The planning process integrates information from your surgery.