Radiotherapy planning overview
Informed by recognized medical guidance
Overview
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
- Radiotherapy planning is a personalised process tailored to your specific cancer type and location.
- It often involves CT or MRI scans to map exactly where the radiation should go.
- The planning team includes a radiation oncologist, medical physicist, and dosimetrist, and may involve your surgeon.
- The planning process can take from a few days to a couple of weeks.
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.
Symptoms
- If you have sudden difficulty breathing, chest pain, or severe allergic reaction to contrast dye used in scans, call your local emergency number immediately.
- If you faint or lose consciousness during planning, seek emergency help.
- ⚠Contact your healthcare team if you develop a fever or signs of infection after any procedure related to planning (like a biopsy).
- ⚠If you experience new, severe pain in the area being treated, let your doctor know within 24 hours.
Common symptoms
- You may not have symptoms from planning itself, but you might feel anxious or tired from the extra scans.
- Some people experience mild discomfort from lying still during imaging scans.
- Temporary skin markings (small tattoos or pen marks) are made to guide treatment.
Symptoms in children
- Children may need extra support to stay still during scans – sometimes a short sleep (sedation) is used.
- They might feel scared or confused about the process, so child life specialists often help.
Symptoms in older adults
- Older adults may have difficulty lying flat or staying still for long periods.
- They may need breaks during imaging or special cushions for comfort.
Causes
Main causes
- The need for radiotherapy planning arises because you have a cancer that can be treated with radiation.
- Your surgeon may request planning after surgery to target any remaining cancer cells or to shrink a tumour before an operation.
Risk factors
- There are no specific risk factors for needing radiotherapy planning – it is simply a part of cancer treatment.
- However, certain cancer types (like breast, prostate, lung, head and neck) more commonly require radiation.
When to see a doctor
See a doctor urgently if:
- If you have severe pain, bleeding, or swelling in the area to be treated, inform your doctor immediately.
Book a routine appointment if:
- Discuss radiotherapy planning with your cancer care team as soon as your diagnosis is confirmed and treatment options are being considered.
- If you have questions or concerns about the planning process, schedule a routine appointment with your radiation oncologist or clinical nurse specialist.
Diagnosis
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.
Tests that may be done
- CT scan (often a special planning CT where you lie in the treatment position)
- MRI scan if needed for soft tissue detail
- PET scan to see active cancer cells
- Blood tests to check your general health before treatment
What to expect at your appointment
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.
Treatment
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.
Self-care at home
- Stay well hydrated and eat a balanced diet to keep your energy up before treatment.
- Get plenty of rest the night before your planning scan.
- Wear comfortable, loose clothing to your appointment.
- Ask your healthcare team any questions you have – write them down beforehand.
Medical treatments
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.
When is surgery considered?
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.
Living with this condition
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.
Lifestyle tips
- Keep a regular routine and try to stay active as much as you feel able.
- Reduce stress by practising relaxation techniques or talking to friends and family.
- Avoid smoking and limit alcohol – these can affect healing and treatment effectiveness.
Diet and exercise
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.
Mental health and emotional wellbeing
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.
Prevention
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.
Vaccines
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.
Screening programmes
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.
Complications
If left untreated
- If you do not go through radiotherapy planning when recommended, you may not receive the radiation treatment that could control or cure your cancer.
- Delaying planning can allow the tumour to grow or spread, making treatment more difficult.
Long-term outlook
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.
Find support
International organisations
Local organisations
- Your hospital’s radiation oncology department · Check your local hospital website or ask your care team
Helplines
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
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.
Related conditions
Sources and guidance
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 16, 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.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.