Figure 6
From: Fast assessment of lipid content in arteries in vivo by intravascular photoacoustic tomography
Ex vivo IVPA imaging of a human right coronary artery. (a,e) Representative cross-sectional PA images, (b,f) US images, (c,g) merged PA/US images and (d,h) their corresponding Movat’s pentachrome-stained histopathology sections. The frame locations along the artery are indicated by individual color lines in panel i–l. In panel g, the boundaries of lumen and external elastic membrane are outlined by yellow and green lines, respectively, to illustrate the intimal thickening observed on US image. Intimal thickening having lipid is shown by the arrows in panel h. (i) Maximum PA amplitude at each radial direction (φ) from 0 to 360° along pullback direction (z) from 0 to 40 mm, and (j) their corresponding depth from the center of the catheter. (k) Angular ratio of maximum lipid pool at individual depth along the artery. (l) Quantitated lipid area at each cross-section of the artery for the 40-mm pullback.
