Document Detail

On the use of motion-based frame rejection in temporal averaging denoising for segmentation of echocardiographic image sequences.
MedLine Citation:
PMID:  19963713     Owner:  NLM     Status:  MEDLINE    
We have recently introduced an algorithm for semi-automatic segmentation of the left ventricular wall in short-axis echocardiographic images (EMBC 30:218-221). In its preprocessing stage, the algorithm uses temporal averaging for image denoising. Motion estimation is used to detect and reject frames that do not correlate well with the set of images being averaged. However, the process of estimating motion vectors is computationally intense, which increases the algorithm's computation time. In this work, we evaluate the viability of replacing the motion estimation stage with less computationally intense approaches. Two alternative techniques are evaluated. The ventricular contours obtained from each of the three algorithm variants were quantitatively and qualitatively compared with contours manually-segmented by a specialist. We show that it is possible to reduce the algorithm's computational load without significantly reducing the segmentation quality. The proposed algorithms are also compared with three other techniques from the literature.
Maria do Carmo Dos Reis; Joao L A Carvalho; Bruno L Macchiavello; Daniel F Vasconcelos; Adson F da Rocha; Francisco A O Nascimento; Juliana F Camapum
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  2009     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2009  
Date Detail:
Created Date:  2009-12-07     Completed Date:  2010-04-02     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  507-10     Citation Subset:  IM    
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MeSH Terms
Echocardiography / methods*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Reproducibility of Results
Sensitivity and Specificity
Subtraction Technique*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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