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J Electrocardiol. 2018 Jan - Feb;51(1):60-67. doi: 10.1016/j.jelectrocard.2017.08.035. Epub 2017 Sep 1.

Torso geometry reconstruction and body surface electrode localization using three-dimensional photography.

Author information

1
Knight Cardiovascular Institute, Oregon Health and Science University, Portland, USA.
2
Knight Cardiovascular Institute, Oregon Health and Science University, Portland, USA; Portland State University, Portland, USA.
3
University of Oregon, Eugene, USA.
4
Peacs BV, Arnhem, The Netherlands.
5
Knight Cardiovascular Institute, Oregon Health and Science University, Portland, USA. Electronic address: tereshch@ohsu.edu.

Abstract

We conducted a prospective clinical study (n=14; 29% female) to assess the accuracy of a three-dimensional (3D) photography-based method of torso geometry reconstruction and body surface electrodes localization. The position of 74 body surface electrocardiographic (ECG) electrodes (diameter 5mm) was defined by two methods: 3D photography, and CT (marker diameter 2mm) or MRI (marker size 10×20mm) imaging. Bland-Altman analysis showed good agreement in X (bias -2.5 [95% limits of agreement (LoA) -19.5 to 14.3] mm), Y (bias -0.1 [95% LoA -14.1 to 13.9] mm), and Z coordinates (bias -0.8 [95% LoA -15.6 to 14.2] mm), as defined by the CT/MRI imaging, and 3D photography. The average Hausdorff distance between the two torso geometry reconstructions was 11.17±3.05mm. Thus, accurate torso geometry reconstruction using 3D photography is feasible. Body surface ECG electrodes coordinates as defined by the CT/MRI imaging, and 3D photography, are in good agreement.

KEYWORDS:

ECG imaging; ECG recording; Electrode position

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