Implication of the first decision on visual information-sampling in the spatial frequency domain in pulmonary nodule recognition

Pietrzyk, Mariusz W., Manning, David J., Donovan, Tim ORCID logo ORCID: and Dix, Alan (2010) Implication of the first decision on visual information-sampling in the spatial frequency domain in pulmonary nodule recognition. Proceedings of SPIE, 7627 (762719).

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Aim: To investigate the impact on visual sampling strategy and pulmonary nodule recognition of image-based properties of background locations in dwelled regions where the first overt decision was made.

Background: Recent studies in mammography show that the first overt decision (TP or FP) has an influence on further image reading including the correctness of the following decisions. Furthermore, the correlation between the spatial frequency properties of the local background following decision sites and the first decision correctness has been reported.

Methods: Subjects with different radiological experience were eye tracked during detection of pulmonary nodules from PA chest radiographs. Number of outcomes and the overall quality of performance are analysed in terms of the cases where correct or incorrect decisions were made. JAFROC methodology is applied. The spatial frequency properties of selected local backgrounds related to a certain decisions were studied. ANOVA was used to compare the logarithmic values of energy carried by non redundant stationary wavelet packet coefficients.

Results: A strong correlation has been found between the number of TP as a first decision and the JAFROC score (r = 0.74). The number of FP as a first decision was found negatively correlated with JAFROC (r = -0.75). Moreover, the differential spatial frequency profiles outcomes depend on the first choice correctness.

Item Type: Article
Journal / Publication Title: Proceedings of SPIE
Publisher: Society of Photo-optical Instrumentation Engineers (SPIE)
ISSN: 1996-756X
ISBN: 9780819480286
Departments: Academic Departments > Medical & Sport Sciences (MSS) > Health and Medical Sciences
Additional Information: Proceedings of event: 'SPIE Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment' (San Diego, California, United States).
Depositing User: Insight Administrator
Date Deposited: 03 Feb 2011 10:11
Last Modified: 12 Jan 2024 09:01


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