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  Indian J Med Microbiol
 

Figure 8: Artifacts. A-F show artifacts common to IVUS and OCT. (A & B) Non-uniform rotational deformity [red stars] and sew up artifact [blue arrow]. (C) Obliquity artifact, yellow arrow head indicates shadowing artifact from guide wire. (D) Multiple reflection artifact [white arrow head]. (E & F) Stent reverberations [yellow arrows]. (G) Calcium reverberation [red arrows]. (H–L) show IVUS specific artifacts. (H) Ring down artifact [orange arrows]. (I) Air bubble with ring down artifact [white arrows]. (J) Air bubble artifact with poor image quality. (K) Blood speckle artifact. (L) Side lobe artifact [blue arrow heads]). M–R show OCT specific artifacts. (M) Residual blood artifact [yellow star]. (N) Fold over artifact [blue arrows]. (O) Saturation artifact [white arrow heads] & blooming artifact [green arrow]. (P) Proximity artifact [red arrow head] and tangential signal drop-out [red arrow]. (Q) Merry go round artifact [blue arrow head]. (R) Sunflower artifact [yellow arrow heads]

Figure 8: Artifacts. A-F show artifacts common to IVUS and OCT. (A & B) Non-uniform rotational deformity [red stars] and sew up artifact [blue arrow]. (C) Obliquity artifact, yellow arrow head indicates shadowing artifact from guide wire. (D) Multiple reflection artifact [white arrow head]. (E & F) Stent reverberations [yellow arrows]. (G) Calcium reverberation [red arrows]. (H–L) show IVUS specific artifacts. (H) Ring down artifact [orange arrows]. (I) Air bubble with ring down artifact [white arrows]. (J) Air bubble artifact with poor image quality. (K) Blood speckle artifact. (L) Side lobe artifact [blue arrow heads]). M–R show OCT specific artifacts. (M) Residual blood artifact [yellow star]. (N) Fold over artifact [blue arrows]. (O) Saturation artifact [white arrow heads] & blooming artifact [green arrow]. (P) Proximity artifact [red arrow head] and tangential signal drop-out [red arrow]. (Q) Merry go round artifact [blue arrow head]. (R) Sunflower artifact [yellow arrow heads]