Proton Therapy Simulator

Proton therapy dosimetry simulator

Calibrate a scanned proton beam from start to finish: choose your chamber, set up the water phantom, irradiate and calculate the reference dose, without taking time on the real machine.

Launch simulator

Runs in a desktop browser (Chrome, Firefox or Edge). No installation needed.

Depth-dose curve of a proton beam, with the Bragg peak at around 151 mm
Dose deposited by a proton beam as a function of depth.

Four calibration exercises

Choose the beam type and the task. You can determine beam quality first and then the dose, or go straight to the dose if you already know the beam quality.

Beam quality

Dose under reference conditions

Monoenergetic beam

70 to 230 MeV

Measure the depth-dose curve and obtain the residual range of the beam at the selected energy.

Determine the dose per monitor unit in a 10 × 10 cm field.

SOBP beam

Spread-out Bragg peak

Measure the depth-dose profile of the spread-out peak.

Determine the dose under reference conditions in a 10 × 10 cm field.

All exercises follow the IAEA TRS-398 code of practice (2024 revision).

How a session works

The simulator follows the same order as a calibration in the treatment room, with the same decisions you would make with the real equipment.

  1. Choose the exercise

    Beam type and task: beam quality or reference dose.

  2. Set up

    Rotate the gantry to 0° or 90°, choose the chamber, the electrometer voltage and polarity, and the irradiation type.

  3. Irradiate and measure

    Set the monitor units and measure at a fixed point or with a scan in the water tank, accounting for pressure and temperature.

  4. Download the worksheet

    Save your measurements and calculations as a PDF to review or hand in.

Six ionization chambers

Each detector comes with its manufacturer's manual and calibration certificate, so you can calculate the effective point of measurement and apply the calibration coefficient just as in a real lab.

  • Advanced MarkusPTW
  • Bragg Peak 34089PTW
  • Roos 34001PTW
  • PPC05IBA Dosimetry
  • StingrayIBA Dosimetry
  • FC65-GIBA Dosimetry

Before you start

  • Use a computer with an up-to-date version of Chrome, Firefox or Edge. Phones and tablets offer a limited experience.
  • When you enter, log in with your account or create one with your email.
  • The first load takes a little longer. After that it loads faster.
  • Stay connected to the internet throughout the session: measurements are processed online.
  • If your institution filters web traffic, ask your IT department to allow this domain.

Licences for institutions

Hospitals, universities and training centres can license the simulator for their medical physics and radiotherapy teams. Get in touch and we'll walk you through the options.

Request information