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. 2015 Jan 27;13:6. doi: 10.1186/1476-7120-13-6

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© Cong et al.; licensee BioMed Central. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Both strain curves and a color-coded 17-segment bull’s eye plot were presented. Color lines indicate regional strain; white dotted line means global (average) strain. Values of longitudinal strain, circumferential strain, and area strain are negative (sign -), whereas values of radial strain are positive (sign +). GAS indicates global area strain; GCS, global circumferential strain; GLS, global longitudinal strain; GRS, global radial strain.