Accuracy of Real-Time Single- and Multi-Beat 3-D Speckle Tracking Echocardiography In Vitro |
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Authors: | Johannes Just Hjertaas,Henrik Fosså ,Grete Lunestad Dybdahl,Renate Grü ner,Per Lunde,Knut Matre |
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Affiliation: | ∗ Institute of Medicine, University of Bergen, Bergen, Norway;† Department of Physics and Technology, University of Bergen, Bergen, Norway |
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Abstract: | With little data published on the accuracy of cardiac 3-D strain measurements, we investigated the agreement between 3-D echocardiography and sonomicrometry in an in vitro model with a polyvinyl alcohol phantom. A cardiac scanner with a 3-D probe was used to acquire recordings at 15 different stroke volumes at a heart rate of 60 beats/min, and eight different stroke volumes at a heart rate of 120 beats/min. Sonomicrometry was used as a reference, monitoring longitudinal, circumferential and radial lengths. Both single- and multi-beat acquisitions were recorded. Strain values were compared with sonomicrometer strain using linear correlation coefficients and Bland–Altman analysis. Multi-beat acquisition showed good agreement, whereas real-time images showed less agreement. The best correlation was obtained for a heart rate 60 of beats/min at a volume rate 36.6 volumes/s. |
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Keywords: | In  vitro Phantom Left ventricle Echocardiography Three-dimensional ultrasound Strain Sonomicrometer Volume rate Frame rate Polyvinyl alcohol |
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