%0 Conference Proceedings
%T Experts vs Novices: Applying Eye-tracking Methodologies in Colonoscopy Video Screening for Polyp Search
%A Jorge Bernal
%A Fernando Vilariño
%A F. Javier Sanchez
%A M. Arnold
%A Anarta Ghosh
%A Gerard Lacey
%B 2014 Symposium on Eye Tracking Research and Applications
%D 2014
%@ 978-1-4503-2751-0
%F Jorge Bernal2014
%O MV; 600.047; 600.060;SIAI
%O exported from refbase (http://refbase.cvc.uab.es/show.php?record=2448), last updated on Thu, 10 Nov 2016 11:50:06 +0100
%X We present in this paper a novel study aiming at identifying the differences in visual search patterns between physicians of diverse levels of expertise during the screening of colonoscopy videos. Physicians were clustered into two groups -experts and novices- according to the number of procedures performed, and fixations were captured by an eye-tracker device during the task of polyp search in different video sequences. These fixations were integrated into heat maps, one for each cluster. The obtained maps were validated over a ground truth consisting of a mask of the polyp, and the comparison between experts and novices was performed by using metrics such as reaction time, dwelling time and energy concentration ratio. Experimental results show a statistically significant difference between experts and novices, and the obtained maps show to be a useful tool for the characterisation of the behaviour of each group.
%U http://refbase.cvc.uab.es/files/BVS2014.pdf
%U http://dx.doi.org/10.1145/2578153.2578189
%P 223-226