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. 2019 Jun 19;9:8764. doi: 10.1038/s41598-019-45283-z

Figure 4.

Figure 4

(a) Persistence diagram (degree 1) of an ROI containing HCC. Numerous dots denote birth–death pairs of cavities above the line of y = x. The dot colors reflect the number of birth–death pairs created at the points. (b) Persistence images were obtained from this persistence diagram. The dot color density is determined by the importance level in data characterization.