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The Accuracy of 3D Optical Reconstruction and Additive Manufacturing Processes in Reproducing Detailed Subject-Specific Anatomy

机译:三维光学重建和增材制造过程在再现详细的特定主题解剖学中的准确性

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摘要

3D reconstruction and 3D printing of subject-specific anatomy is a promising technology for supporting clinicians in the visualisation of disease progression and planning for surgical intervention. In this context, the 3D model is typically obtained from segmentation of magnetic resonance imaging (MRI), computed tomography (CT) or echocardiography images. Although these modalities allow imaging of the tissues in vivo, assessment of quality of the reconstruction is limited by the lack of a reference geometry as the subject-specific anatomy is unknown prior to image acquisition. In this work, an optical method based on 3D digital image correlation (3D-DIC) techniques is used to reconstruct the shape of the surface of an ex vivo porcine heart. This technique requires two digital charge-coupled device (CCD) cameras to provide full-field shape measurements and to generate a standard tessellation language (STL) file of the sample surface. The aim of this work was to quantify the error of 3D-DIC shape measurements using the additive manufacturing process. The limitations of 3D printed object resolution, the discrepancy in reconstruction of the surface of cardiac soft tissue and a 3D printed model of the same surface were evaluated. The results obtained demonstrated the ability of the 3D-DIC technique to reconstruct localised and detailed features on the cardiac surface with sub-millimeter accuracy.
机译:3D重建和特定对象解剖结构的3D打印是一种有前途的技术,可支持临床医生对疾病进展进行可视化并进行手术干预计划。在这种情况下,通常从磁共振成像(MRI),计算机断层扫描(CT)或超声心动图图像的分割中获得3D模型。尽管这些方式允许在体内对组织进行成像,但是由于缺乏参考几何形状,因此重建质量的评估受到限制,因为在获取图像之前未知对象的特定解剖结构。在这项工作中,基于3D数字图像相关(3D-DIC)技术的光学方法被用于重建离体猪心脏表面的形状。该技术需要两个数字电荷耦合器件(CCD)摄像机来提供全场形状测量并生成样品表面的标准镶嵌语言(STL)文件。这项工作的目的是使用增材制造工艺来量化3D-DIC形状测量的误差。评估了3D打印对象分辨率的局限性,心脏软组织表面重建的差异以及同一表面的3D打印模型。获得的结果证明了3D-DIC技术能够以亚毫米精度重建心脏表面的局部和详细特征。

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