Assessment of Factors Affecting Accuracy and Repeatability in Semi-Automated Echocardiographic Measurement of Chamber Volume Using a Physical Phantom

Wild, J; Sims, AJ; Pemberton, J; Kenny, A; Murray, A

doi:10.1109/CIC.2007.4745424

Assessment of Factors Affecting Accuracy and Repeatability in Semi-Automated Echocardiographic Measurement of Chamber Volume Using a Physical Phantom

Lookup NU author(s): Dr Andrew Sims ORCiD, Emeritus Professor Alan Murray ORCiD

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Abstract

Three dimensional echocardiography offers the benefit of non-invasive measurement of chamber volume at the cost of increased effort of data handling. Automated or semi-automated image analysis may help to reduce manual effort but can embody assumptions and limitations which have a significant effect on results. We used a laboratory balloon phantom to study, the effect of three factors used in a semi-automated image analysis technique. These factors were: a) the use of 2D or 3D image gradient operators; b) manual or automatic detection of base; c) fixed or case-by-case limit of short-axis radius. We found that 3D image gradient operators were more accurate than their traditional 2D counterparts; that manual identification of the base had no effect on accuracy or repeatability, and that setting the maximum short axis radius on a case-by-case basis was more accurate and repeatable than achieved with a constant value.