Normal coronary artery as visualized by intracoronary OCT

(A) Cross sectional view of the coronary artery. The coronary lumen is signal-poor and black, whereas the vessel is visualized using sepia false color scale. The normal artery wall shows three-layer appearance. (IC) OCT imaging catheter in the center of the lumen; asterisk indicates the angioplasty guide wire artefact.
(B) Magnification (2.8x) showing three layer appearance of the normal vessel wall corresponding to the intma (I) which appears signal rich, bright yellow; the media (M) which appears signal-poor, dark and the adventitia (A) which appears signal-rich, bright yellow, peri-adventitial tissue is visible (PAT).