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. Author manuscript; available in PMC: 2013 Feb 27.
Published in final edited form as: JACC Cardiovasc Imaging. 2011 Sep;4(9):1022–1039. doi: 10.1016/j.jcmg.2011.03.020

Figure 9. Chemical Concentrations Within a Human Coronary Artery Determined Using Intravascular Catheter System Based on Raman Spectroscopy.

Figure 9

(Upper Panel) The upper contour map shows the total cholesterol concentrations throughout the artery segment. (Lower Panel) The lower graph displays the nonesterified-cholesterol to cholesterol ester (FC/CE) ratio, calculated when the amount of total cholesterol was estimated to be above 5% (gray otherwise). The plot abscissa indicates the length along the sample, while the ordinate indicates which fiber sensor in the catheter is recording information along a given row. The large increase in the FC content within the focal deposit centered ~2.5 cm suggests the presence of a necrotic core containing crystalline cholesterol. Figure courtesy of James Brennan.