Procedure guide · Radiation oncology
Proton beam therapy is a form of radiotherapy that uses protons instead of X-rays. The US National Cancer Institute notes that proton beams may reduce the amount of normal tissue exposed to radiation, though cost and machine size limit access. It is often used for complex cancers and for children, and a radiation oncologist decides whether it is appropriate for you.
What is proton beam therapy?
Most radiotherapy uses photons (X-rays). Protons are particles found inside atoms. University College London Hospitals, an NHS trust, describes treatment delivered by a gantry that rotates around the patient using pencil-beam scanning. It explains that this can allow a higher dose to the tumour with less damage to nearby healthy tissue, which may mean fewer side effects.
Like other external beam treatment it is painless. It does not make you radioactive.
Who may be considered for proton therapy?
UCLH says proton beam therapy is used for complex cancers in children and adults and is often used for children and young people. It may be given alone or with X-ray radiotherapy, surgery or chemotherapy. It is not automatically better for every cancer. A radiation oncologist compares proton and photon plans for your tumour and decides which suits you.
On IndiaMedica’s destination pages we note that Chennai has one of the few proton therapy centres in India. Ask any centre directly about eligibility before you plan travel.
Which reports does a proton therapy team usually ask for?
Ask the centre whether it needs:
- the histopathology report
- recent MRI and CT scans with images, not only reports
- operation notes and surgical pathology, if you have had surgery
- details of chemotherapy given or planned
- full details of any previous radiation, including dose and area
- for children, notes on whether general anaesthesia may be needed to keep still
How do I plan a proton therapy trip?
Proton therapy involves a planning stage and then many treatment sessions. UCLH describes planning appointments over several days, with a mask or other device to keep you still, a planning CT scan with contrast, small skin marks and sometimes an MRI. It notes there may be a wait of some weeks before treatment starts. Sessions are usually on weekdays, and most of each session is spent checking your position with images.
This means a long stay. Choose accommodation close to the centre, ideally with a kitchen. For a child, plan schooling, play and rest. Bring an attendant who can stay throughout. Before you leave ask for a treatment summary showing the dose and area treated, which any future doctor will need.
What should I ask the centre before booking?
- Do you consider proton therapy more suitable than photon radiotherapy for my tumour, and why?
- How long is the planning stage and when would treatment start?
- How many sessions will I need?
- Will my child need anaesthesia for each session?
- What happens if the machine is out of service on a treatment day?
- Who will follow up my scans at home?
Who decides
IndiaMedica does not give medical advice. Your oncology team decides on treatment, its schedule, how long you stay and when it is safe to travel.
Questions people ask
Is proton therapy better than ordinary radiotherapy?
Not for every cancer. The NCI notes that protons may reduce exposure of normal tissue. It also says photons are the most common beam type. Your radiation oncologist compares options for your case and explains the reasoning.
Why are children often treated with protons?
UCLH says proton beam therapy is often used to treat cancers in children and young people. Because children are still growing, limiting radiation to healthy tissue is especially important. Your child’s oncologist decides whether protons suit their particular tumour.
Sources
- National Cancer Institute — External beam radiation therapy
- University College London Hospitals NHS — Having proton beam therapy
General information, not medical or legal advice. Rules change: confirm with the official source. Your treating specialist decides on suitability, treatment and length of stay. How we write and check.