Spatial frequency characteristics at image decision-point locations for observers with different radiological backgrounds in lung nodule detection

Pietrzyk, Mariusz W., Manning, David, Dix, Alan and Donovan, Tim (2009) Spatial frequency characteristics at image decision-point locations for observers with different radiological backgrounds in lung nodule detection. Proceedings of SPIE, 7263 (72630I). Full text not available from this repository.

(Contact the author)
Official URL: https://doi.org/10.1117/12.810063

Abstract

Aim: The goal of the study is to determine the spatial frequency characteristics at locations in the image of overt and covert observers' decisions and find out if there are any similarities in different observers' groups: the same radiological experience group or the same accuracy scored level.

Background: The radiological task is described as a visual searching decision making procedure involving visual perception and cognitive processing. Humans perceive the world through a number of spatial frequency channels, each sensitive to visual information carried by different spatial frequency ranges and orientations. Recent studies have shown that particular physical properties of local and global image-based elements are correlated with the performance and the level of experience of human observers in breast cancer and lung nodule detections. Neurological findings in visual perception were an inspiration for wavelet applications in vision research because the methodology tries to mimic the brain processing algorithms.

Methods: The wavelet approach to the set of postero-anterior chest radiographs analysis has been used to characterize perceptual preferences observers with different levels of experience in the radiological task. Psychophysical methodology has been applied to track eye movements over the image, where particular ROIs related to the observers' fixation clusters has been analysed in the spaces frame by Daubechies functions.

Results: Significance differences have been found between the spatial frequency characteristics at the location of different decisions.

Item Type: Article
Journal or Publication Title: Proceedings of SPIE
Publisher: Society of Photo-optical Instrumentation Engineers (SPIE)
ISSN: 1996-756X
ISBN: 9780819475145
Departments: Faculty of Health and Science > Medical and Sports Sciences > Health and Medical Sciences
Additional Information: Proceedings of: 'Medical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment'.
Depositing User: Insight Administrator
Date Deposited: 03 Feb 2011 10:11
Last Modified: 01 Aug 2017 12:36
URI: http://insight.cumbria.ac.uk/id/eprint/403

Actions (repository staff only)

Edit Item Edit Item