Agreement and reproducibility between 3DStent vs. Optical Coherence Tomography for evaluation of stent area and diameter.

3DStent is a novel rotational angiography imaging capable of 3D reconstruction and measuring stent area and diameter, without need for intravascular imaging. To compare 3DStent and OCT-derived stent area and diameter after PCI. Patients with de novo coronary lesions who underwent treatment with a single DES and evaluated by OCT and 3DStent were included. Stent area and diameter were measured by 3DStent, at abluminal, mid and endoluminal side and by OCT. From September 2023 to February 2024 six coronary lesions were analyzed. Post-PCI stent area measured by OCT was (mean ± standard deviation) 7.03 ± 2.85 mm² and by 3DStent 9.41 ± 2.79 mm², 7.21 ± 2.23 mm² and 5.63 ± 1.83 mm² at abluminal, mid and endoluminal side, respectively. Stent diameter by OCT was 2.93 ± 0.58 mm, and by 3DStent 3.27 ± 0.50 mm, 2.86 ± 0.49 mm and 2.52 ± 0.45 mm at abluminal, mid and endoluminal side, respectively. Significant correlation was observed between OCT and 3DStent in relation to stent area (Exp(B) 3.35, mean of difference 0.19 ± 1.01 mm², 95%CI -1.80-2.17 mm², p < 0.001) and diameter (Exp(B) 3.18, mean difference - 0.07 ± 0.18 mm, 95%CI -0.43-0.30 mm, p < 0.001), particularly when 3DStent measurements performed at the mid side. Very high reproducibility was demonstrated by intra- and inter-observer analysis (r = 0.92 and r = 0.93 respectively). 3DStent appears to be an easy and reproducible tool to assess post-PCI stent area and diameter as compared to OCT.