Table 1

Comparison Between TD-OCT and Prototype FD-OCT

SpecificationsTD-OCTFD-OCT
Axial scans/s5,000–10,000∼100,000
Lines/frame∼200∼500–1,000
Max. frame rate, fps20∼200
Max. pullback speed, mm/s320
Scan diameter (FOV), mm6.8∼6–11
Axial resolution, µm1510–15
Lateral resolution, µm9020–40
Tissue penetration, mm1.5–32–3.5
Balloon occlusionHighly recommendedOptional
Catheter size, mm0.480.8–1.0

FD-OCT = frequency or Fourier-domain optical coherence tomography; FOV = field of view; TD-OCT = time-domain optical coherence tomography.

  • Values are approximate; TD-OCT specifications refer to the Lightlab time-domain optical coherence tomography (TD-OCT) system (M2/M3).