Time resolved EPID based thickness measurements for radiotherapy treatment verification

Study level


Master of Philosophy


Vacation research experience scheme

Topic status

We're looking for students to study this topic.


Dr Andrew Fielding
Senior Lecturer
Division / Faculty
Science and Engineering Faculty


Verifying the delivery of radiation during radiotherapy treatments is increasingly important. The patient position and delivered radiation dose are equally important for a successful clinical outcome. Electronic Portal Imaging Devices (EPIDs) can be used to measure the radiation dose exiting the patient. We have developed a method for converting the measured signal in the EPID to tissue equivalent thickness, a surrogate for radiation dose. This project will investigate the real time measurement of the patient thickness during radiation delivery.

Research activities

  • Simulating the effects of respiratory motion on patient treatments and developing the method for monitoring the variation in patient thickness in real time.
  • Performing monte carlo simulations of the patient treatments to compare with measured data.
  • Investigating dosimetric effect of measured thickness variations.
  • Collaboration with clinical departments


Expected outputs include:
  • A thesis
  • 1-3 journal papers, depending on time-frame and scope
  • System for monitoring patient motion during radiotherapy treatments

Skills and experience

  • Expertise in physics, computer science, engineering or mathematics.
  • Experimental and Data analysis skills
  • Computer programming e.g. MATLAB, python, IDL.
  • Excellent communication skills


You may be able to apply for a research scholarship in our annual scholarship round.

Annual scholarship round



Contact the supervisor for more information.