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. 2021 Apr 18;11(4):250. doi: 10.3390/metabo11040250

Figure 3.

Figure 3

Comparison of DHB and norharmane matrices. (a) Number of lipid ions detected in all MSI datasets from all patients, for MSI datasets acquired using DHB and norharmane matrices (mean ± SD, two-tail paired t-test, ***: p < 0.001, n = 6). (b) Explained variance of the first ten PCs (mean ± SD, n = 6). (c) Venn diagram of the lipid ions in common between all MSI datasets acquired with DHB and norharmane. (d) Score images of the first 3 PCs, k-means clustering (7 clusters), annotated regions and histological images for the same carotid plaque. Annotated regions are calcification (purple), hemorrhage (brown), lipid-necrotic core (black), collagen (yellow), macrophages (orange), outer VSMCs (cyan) and inner VSMCs (green).