Evaluation of the 3D visualization of quantitative stereoelectroencephalographic information: new results

Jean-Louis Dillenseger; Beatriz Sousa Santos; Carlos Ferreira

doi:10.1117/12.431194

26 June 2001 Evaluation of the 3D visualization of quantitative stereoelectroencephalographic information: new results

Jean-Louis Dillenseger, Beatriz Sousa Santos, Carlos Ferreira

Proceedings Volume 4324, Medical Imaging 2001: Image Perception and Performance; (2001) https://doi.org/10.1117/12.431194
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

Abstract

The visual analysis of Stereoelectroencephalographic (SEEG) signals in their anatomical context is aimed at the understanding of the spatio-temporal dynamics of epileptic processes. The magnitude of these signals may be encoded by graphical glyphs, having a direct impact on the perception of the values. Our study is devoted to the evaluation of the quantitative visualization of these signals, specifically to the influence of the coding scheme of the glyphs on the understanding and the analysis of the signals. This work describes an experiment conducted with human observers in order to evaluate three different coding schemes used to visualize the magnitude of SEEG signals in their 3D anatomical context. We intended to study if any of these coding schemes allows better performances for the human observers in two aspects: accuracy and speed. A protocol has been developed in order to measure these aspects. The results that will be presented in this work were obtained from 40 human observers. The comparison between the three coding schemes has first been performed through an Exploratory Data Analysis (EDA). The statistical significance of this comparison has then been established using nonparametric methods. The influence on the observers' performance of some other factors has also been investigated.

Citation Download Citation

Jean-Louis Dillenseger, Beatriz Sousa Santos, and Carlos Ferreira "Evaluation of the 3D visualization of quantitative stereoelectroencephalographic information: new results", Proc. SPIE 4324, Medical Imaging 2001: Image Perception and Performance, (26 June 2001); https://doi.org/10.1117/12.431194

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KEYWORDS

Optical spheres

Visualization

Image compression

Error analysis

3D image processing

3D visualizations

Visual analytics

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