Research opportunities

Diagnostic performance of digital 2D periapical radiography and 3D cone beam computed tomography 


There is limited information available about the diagnostic performance of commonly used imaging modalities in dentistry.


  • To assess the diagnostic performance of digital 2D periapical radiography compared to 3D cone beam computed tomography in the detection of dental abnormalities using a free response paradigm.
  • To identify factors affecting performance of both imaging modalities.

Who can participate?

Practising general dentists in Victoria.

What will you be asked to do?

You will be asked to interpret 60 periapical and 120 cone beam computed tomography images, spread over two reading sessions. This will be done in person on a provided computer workstation, at a location convenient for you.

You will perform a total of 180 image interpretations for this study. We anticipate it will take approximately four hours to complete the two reading sessions (two hours each session).

At the beginning of the study, we will ask you some demographic questions relating to your experience as a radiologist or dentist. You will have the opportunity to review your reports and receive feedback on your diagnostic performance.

Why should you participate?

  • This project is in collaboration with the Medical Imaging Optimisation and Perception Group at The University of Sydney, whose research publications in medical image perception are amongst the world’s best;
  • This is a world first study in dentistry using sophisticated measurement techniques and diagnostic performance assessment;
  • The results of this study will provide data never collected before; clinicians will be able to know how well diagnostic dental imaging performs and how diagnostic imaging is interpreted; and
  • This will help clinicians understand the factors that drive performance, which can be used to tailor strategies to improve diagnostic accuracy in dentistry.

How do you participate?

Please email

Who are the researchers?

Dr Ernest Ekpo, Chief Investigator

Prof Patrick Brennan, Chief Investigator

Dr Kehn Yapp, Associate Investigator

Click here to register your interest