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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: IEEE Trans Med Imaging. 2018 Nov 26;38(5):1304–1313. doi: 10.1109/TMI.2018.2883301

Fig. 3:

Fig. 3:

Background subtraction for various spectral energy thresholds: (a) 0.1, (b) 0.35, and (c) 0.7. A small threshold counts some background pixels as tissue (white), and a large threshold marks some tissue pixels as background (black). Compare to Figure 1.