|IVUS||TD OCT||FD OCT|
|Resolution, axial/lateral, μm||100/200||15/90||15/20–40|
|Frame rate, frames/s||30||16–20||100|
|Pullback rate, mm/s||0.5–1.0||1–3||20|
|Axial scans, ×1,000||3.2–4.8||5.4|
|Lines, axial scans/frame||200–40||500|
|Maximum scan diameter, mm||10||6.8||9.7|
|Tissue penetration, mm||10||1–2.5||2.0–3.5|
Sources: Schuman et al. (2), Morgensen et al. (5), and Jang (11), and Lightlab, Westford, MA.
Axial resolution is measured in tissue. Scan diameter is measured in saline for time domain (TD) optical coherence tomography (OCT) and in contrast medium for Fourier domain (FD) OCT.
IVUS = intravascular ultrasound.