Thrush A J, Bonnett D E, Elliott M R, Kutob S S, Evans D H
Medical Physics Department, Leicester Royal Infirmary, UK.
Ultrasound Med Biol. 1997;23(3):437-45. doi: 10.1016/s0301-5629(96)00210-4.
Three-dimensional (3D) reconstructions of arteries can be produced using two-dimensional (2D) intravascular ultrasound (IVUS) images. Any artefact that affects 2D images has the potential to limit the quality of a 3D reconstruction. Using a catheter withdrawal technique, a range of test rigs were used to assess: (i) the effect of rotation of the probe orientation; (ii) the ability to reconstruct the true path of a tortuous vessel; (iii) the effect of image distortion on diameter measurements; (iv) the number of images per unit length used to produce a 3D reconstruction; and (v) the quality of the IVUS 3D reconstruction of a stent. These investigations show that 3D IVUS imaging is prone to artefacts. For 3D IVUS images to be used to quantify the vessel path or to make accurate measurements of vessel dimensions, more information about the catheter tip position and orientation is required than is currently available with the pullback technique.
利用二维血管内超声（IVUS）图像可以生成动脉的三维（3D）重建图像。任何影响二维图像的伪像都有可能限制三维重建的质量。采用导管回撤技术，使用一系列试验装置来评估：（i）探头方向旋转的影响；（ii）重建弯曲血管真实路径的能力；（iii）图像失真对直径测量的影响；（iv）用于生成三维重建的每单位长度图像数量；以及（v）支架的血管内超声三维重建质量。这些研究表明，三维血管内超声成像容易出现伪像。要使用三维血管内超声图像来量化血管路径或准确测量血管尺寸，相比目前回撤技术所提供的信息，需要更多关于导管尖端位置和方向的信息。
