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. 2014 Feb 11;2014:312764. doi: 10.1155/2014/312764

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Copyright © 2014 Zhonghua Sun.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Depiction of qualitative representation of enhancement. Unprocessed images are displayed (a) before, (b) during, and (c) after injection of microbubbles. Corresponding processed images are displayed in (d)–(f). Enhancement is graded from minimal (blue) to maximal (red). Values are a percentage of the maximum grey level intensity difference (255). Arrows indicate points of intense, stable enhancement at the media-adventitia border. Diffuse points of enhancement are present nearby. Reprint with permission from [53].