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. 2019 Nov 14;18:110. doi: 10.1186/s12938-019-0726-2

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — The flowchart of Regional Average Grayscale Suppression (RAGS) algorithm. In this figure, the red bounding box denoted aneurysm with the white annotation of region name and confidence in images of top raw. The pipeline of RAGS algorithm was displayed in bottom raw. In the rightest image, the red bounding box denoted ROI of aneurysm and the green bounding box denoted the ROI of enlargement area. And the histogram illustrated the difference of grayscale distribution between ROI of aneurysm (red bars) and ROI of enlargement area (green bars)