1. Fast automatic measurement of mitral annulus excursion using a pocket-sized ultrasound system.
- Author
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Snare SR, Mjølstad OC, Orderud F, Haugen BO, and Torp H
- Subjects
- Equipment Design, Equipment Failure Analysis, Humans, Image Enhancement methods, Miniaturization, Reproducibility of Results, Sensitivity and Specificity, Algorithms, Echocardiography instrumentation, Elasticity Imaging Techniques instrumentation, Image Interpretation, Computer-Assisted methods, Mitral Valve diagnostic imaging, Pattern Recognition, Automated methods
- Abstract
We present a fast, automatic method for mitral annulus excursion measurement using pocket-sized ultrasound (PSU). The motivation is to provide PSU users with a rapid measurement of cardiac systolic function. The algorithm combines low-frame-rate tolerance, computational efficiency and automation in a novel way. The method uses a speckle-tracking scheme, initialized and constrained by a deformable model. A feasibility study using 30 apical four-chamber PSU recordings from an unselected patient population revealed an error of (mean ± SD) -1.80 ± 1.96 mm, p < 0.001, when compared with manual anatomic m-mode analysis using laptop scanner data. When only septal side excursion was measured, the mean error was -0.27 ± 1.89 mm, p < 0.001. The accuracy is comparable with previously reported results using semiautomatic methods and full-size scanners. The computation time of 3.7 ms/frame on a laptop computer suggests that a real-time implementation on a PSU device is feasible., (Copyright © 2011 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2011
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