![]() Regarding the amount of eye movement in every 0.02 second we found that the expert tended to interpret images slowly and calmly. In contrast, both components by the expert were relatively low. The result of the trainee had a large amount of both high-frequency components and low-frequency components. We were able to understand the difference in gaze points between experts and trainees by use of the frequency analysis. Furthermore, we examined eye tracking frequency analysis by using the Fast Fourier Transform (FFT). We performed observer studies in reading virtual pathology images and examined observer's image interpretation process using gaze points data. The subjects are radiological technologists who are experienced, and inexperienced in reading CTC. This system can provide gaze points images and excel file data. We used an eye gaze point sensing system, Gazefineder (JVCKENWOOD Corporation, Tokyo, Japan), which can detect pupil point and corneal reflection point by the dark pupil eye tracking. In this study, we attempted to understand how trainees can be improved to a level achieved by experts in viewing of CTC. We investigated gaze points of CT colonography (CTC) interpretation process, and analyzed the difference in gaze points between experts and trainees. It is important to investigate eye tracking gaze points of experts, in order to assist trainees in understanding of image interpretation process.
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