Click on image to view larger version.

Figure 6 Intravascular ultrasound (IVUS) (40 MHz) versus ocular coherence tomography (OCT) comparison. The images in A and C are OCT images, whereas the images in B and D are IVUS (40 MHz) of a native in vitro coronary artery. The IVUS catheters were not reused. In the OCT images, not only is structure better defined but OCT can penetrate completely through the near occlusive vessel to the media. Limitations of OCT penetration depth described in detail in the text. Reprinted (modified), with permission, from Patwari et al. (9).