Figure 2.

Color overlay image of mouse brain section using different cluster beams. a) The three panels on the tissue section are subjected to the analyses using $\mathrm{A}{\mathrm{r}}_{4000}^{+}$, 1.1% methane-doped $\mathrm{A}{\mathrm{r}}_{4000}^{+}$ and ${\mathrm{C}}_{60}^{+}$. The color overlay image shows the distribution of GPCho C34:1 and GPCho C32:0 in blue and cholesterol in yellow. b) The normalized spectra and total lipids counts from the three panels on the tissue section in mass range of m/z 650–850.