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. 2018 Feb 7;5(1):013505. doi: 10.1117/1.JMI.5.1.013505

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© The Authors.

Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Fig. 1 — (a) Ensemble averaged spectra of the test phantoms (27 frames) compared with spectra of the GWH functions $G H_{2}$ and $G H_{8}$ . (b) Averaged spectra of the thyroid nodules (46 images) compared with spectra of the GWH functions $G H_{2}$ and $G H_{8}$ . For each frame, individual A-line spectra were computed and averaged across the frame. The final spectra shown are subsequent averages of all frames.