Ultrasonic Imaging and Tomography

Automated speckle tracking algorithm to aid on-axis imaging in echocardiography

[+] Author Affiliations
Niti M. Dhutia, Graham D. Cole, Massoud Zolgharni, Charlotte H. Manisty, Keith Willson, Alun D. Hughes, Darrel P. Francis

National Heart and Lung Institute, Imperial College London, Hammersmith Hospital, W12 0NN, United Kingdom

Kim H. Parker

Imperial College of Science, Technology, and Medicine, Department of Bioengineering, London SW7 2AZ, United Kingdom

J. Med. Imag. 1(3), 037001 (Nov 25, 2014). doi:10.1117/1.JMI.1.3.037001
History: Received June 23, 2014; Accepted October 31, 2014
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Abstract.  Obtaining a “correct” view in echocardiography is a subjective process in which an operator attempts to obtain images conforming to consensus standard views. Real-time objective quantification of image alignment may assist less experienced operators, but no reliable index yet exists. We present a fully automated algorithm for detecting incorrect medial/lateral translation of an ultrasound probe by image analysis. The ability of the algorithm to distinguish optimal from sub-optimal four-chamber images was compared to that of specialists—the current “gold-standard.” The orientation assessments produced by the automated algorithm correlated well with consensus visual assessments of the specialists (r=0.87) and compared favourably with the correlation between individual specialists and the consensus, 0.82±0.09. Each individual specialist’s assessments were within the consensus of other specialists, 75±14% of the time, and the algorithm’s assessments were within the consensus of specialists 85% of the time. The mean discrepancy in probe translation values between individual specialists and their consensus was 0.97±0.87cm, and between the automated algorithm and specialists’ consensus was 0.92±0.70cm. This technology could be incorporated into hardware to provide real-time guidance for image optimisation—a potentially valuable tool both for training and quality control.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Niti M. Dhutia ; Graham D. Cole ; Massoud Zolgharni ; Charlotte H. Manisty ; Keith Willson, et al.
"Automated speckle tracking algorithm to aid on-axis imaging in echocardiography", J. Med. Imag. 1(3), 037001 (Nov 25, 2014). ; http://dx.doi.org/10.1117/1.JMI.1.3.037001


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