Opt Lett. 2024 Oct 1;49(19):5423-5426. doi: 10.1364/OL.537693.
The integration of digital subtraction angiography (DSA) with intravascular optical coherence tomography (IVOCT) offers a comprehensive 3D arterial model, which is invaluable for the analysis of vascular anatomy and biomechanics. However, the process of image fusion is often hindered by the challenge of accurately orienting IVOCT images. This paper introduces a novel, to our knowledge, dual-path 3D reconstruction method that leverages the guidewire and the vessel's centerline to establish cross sectional direction vectors within the IVOCT images and spatial direction vectors along the guidewire's trajectory. This approach minimizes the accumulation of reconstruction errors by ensuring the precise orientation of each vascular cross section. The efficacy of the proposed method is validated through vascular phantom experiments and the reconstruction of patient-specific 3D coronary models.
数字减影血管造影（DSA）与血管内光学相干断层成像（IVOCT）的融合提供了一个全面的 3D 动脉模型，对于血管解剖和生物力学的分析非常有价值。然而，图像融合的过程常常受到准确定向 IVOCT 图像的挑战的阻碍。本文介绍了一种新颖的、据我们所知的双路径 3D 重建方法，该方法利用导丝和血管中心线在 IVOCT 图像内建立横截面方向向量，并沿着导丝轨迹建立空间方向向量。这种方法通过确保每个血管横截面的精确定向，最大限度地减少了重建误差的积累。通过血管体模实验和患者特定的 3D 冠状动脉模型的重建验证了所提出方法的有效性。
