Go Back

Video Tutorials to Determine the Absorbed dose to Water for High Energy Photon Beams

Interactive tutorials are made available to help users apply the recommendations contained in TRS 398, to determine the absorbed dose to water for high energy photon beams.

The tutorials are intended to be used by clinically qualified medical physicists (CQMPs) and presupposes underlying knowledge in the field of radiotherapy. IAEA relevant publications include: IAEA TRS No. 398, also available in Spanish and Russian, IAEA TRS No. 469, Radiation Oncology Physics: A Handbook for Teachers and Students and relevant slides.

TRS398 Photons Tutorial - 1 How to get started

TRS398 Photons Tutorial - 2 Radiation Treatment Unit and Reference Conditions

TRS398 Photons Tutorial - 3 Ionization chamber and electrometer

TRS398 Photons Tutorial - 4 Measurements

TRS398 Photons Tutorial - 5 Absorbed dose to water at Zref and Zmax

TRS398 Photons Tutorial - 6 Baseline measurements

TRS398 Photons Tutorial - 7 PDD, TPR and TMR

TRS398 Photons Tutorial - 8 Recombination and Polarity Effects


The production of these on-line video tutorials was supported by Belgium, through the Peaceful Uses Initiative (PUI) project: Enhancing education and training programmes in human health through quality assurance in higher education.


The appearance of names of specific companies or products does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA.


This video tutorial was developed by Anna Ralston (St George Hospital, Sydney, Australia). The IAEA Section responsible for this activity is the Section of Dosimetry and Medical Radiation Physics (DMRP) of the Division of Human Health at the IAEA.