Journal
SENSORS
Volume 10, Issue 12, Pages 11428-11439Publisher
MDPI
DOI: 10.3390/s101211428
Keywords
cardiac cycle physical phase; Tei index; left ventricular wall motion amplitude; computer vision; image processing
Funding
- National Natural Science Foundation of China
- Microsoft Research Asia [60870002, 60802087]
- NCET
- Science and Technology Department of Zhejiang Province [2010R10006, 2010C33095, Y1090592]
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The Tei index, an important indicator of heart function, lacks a direct method to compute because it is difficult to directly evaluate the isovolumic contraction time (ICT) and isovolumic relaxation time (IRT) from which the Tei index can be obtained. In this paper, based on the proposed method of accurately measuring the cardiac cycle physical phase, a direct method of calculating the Tei index is presented. The experiments based on real heart medical images show the effectiveness of this method. Moreover, a new method of calculating left ventricular wall motion amplitude is proposed and the experiments show its satisfactory performance.
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