| Automated analysis of strain rate and strain: feasibility and clinical implications. | |
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MedLine Citation:
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PMID: 15891750 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: This study evaluated 3 new automated methods, based on a combination of speckle tracking and tissue Doppler, for the analysis of strain rate (SR) and strain. Feasibility and values for peak systolic strain rate (SR s ) and end-systolic strain (S es ) were assessed. METHODS: Thirty patients with myocardial infarction and 30 normal subjects were examined. Customized software with automatic definition of segments was used for automated measurements. SR s and SR es were measured over each segment simultaneously and identified automatically. The study compared tissue Doppler-based SR and strain measurements without (method 1) and with segment tracking (method 2) to speckle tracking-based measurements (method 3). For tracking, speckle tracking and tissue Doppler were used in combination. Standard manual analysis was used as a reference. RESULTS: The automated analysis (16 segments, 3 apical views) required 2 minutes; manual analysis took 11 minutes. Accuracy was compared in 56 segments (28 mid-infarcted and 28 normal) from 28 patients and was 93.9% for method 1, 93.8% for method 2, 95.8% for method 3, and 96.2% for the manual method. In the normal group, mean SR s (0.27 s -1 ) was less with method 3 than with the other methods ( P < .001). CONCLUSIONS: Our findings indicate that automated analysis of SR and strain, with some manual adjustment, is feasible and quicker than manual analysis. Diagnostic accuracy was similar with all methods. SR s was lower in the speckle tracking-based method than in the Doppler-based methods. |
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Authors:
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Charlotte Bjork Ingul; Hans Torp; Svein Arne Aase; Sigrid Berg; Asbjorn Stoylen; Stig A Slordahl |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography Volume: 18 ISSN: 0894-7317 ISO Abbreviation: J Am Soc Echocardiogr Publication Date: 2005 May |
Date Detail:
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Created Date: 2005-05-13 Completed Date: 2005-08-04 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8801388 Medline TA: J Am Soc Echocardiogr Country: United States |
Other Details:
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Languages: eng Pagination: 411-8 Citation Subset: IM |
Affiliation:
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Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Tronsheim, Norway. charlotte.b.ingul@ntnu.no |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Echocardiography, Doppler* Female Humans Image Processing, Computer-Assisted* Male Myocardial Infarction / ultrasonography* ROC Curve Sensitivity and Specificity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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