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首页> 美国卫生研究院文献>Materials >Quality Control in 3D Printing: Accuracy Analysis of 3D-Printed Models of Patient-Specific Anatomy
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Quality Control in 3D Printing: Accuracy Analysis of 3D-Printed Models of Patient-Specific Anatomy

机译：3D打印质量控制：患者特异性解剖学3D印刷模型的准确性分析

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摘要

As comparative data on the precision of 3D-printed anatomical models are sparse, the aim of this study was to evaluate the accuracy of 3D-printed models of vascular anatomy generated by two commonly used printing technologies. Thirty-five 3D models of large (aortic, wall thickness of 2 mm, n = 30) and small (coronary, wall thickness of 1.25 mm, n = 5) vessels printed with fused deposition modeling (FDM) (rigid, n = 20) and PolyJet (flexible, n = 15) technology were subjected to high-resolution CT scans. From the resulting DICOM (Digital Imaging and Communications in Medicine) dataset, an STL file was generated and wall thickness as well as surface congruency were compared with the original STL file using dedicated 3D engineering software. The mean wall thickness for the large-scale aortic models was 2.11 µm (+5%), and 1.26 µm (+0.8%) for the coronary models, resulting in an overall mean wall thickness of +5% for all 35 3D models when compared to the original STL file. The mean surface deviation was found to be +120 µm for all models, with +100 µm for the aortic and +180 µm for the coronary 3D models, respectively. Both printing technologies were found to conform with the currently set standards of accuracy (<1 mm), demonstrating that accurate 3D models of large and small vessel anatomy can be generated by both FDM and PolyJet printing technology using rigid and flexible polymers.
机译：作为关于3D印刷解剖模型的精度的比较数据稀疏，本研究的目的是评估由两种常用的印刷技术产生的血管解剖结构3D印刷模型的准确性。大型3D模型大（主动脉，壁厚2mm，n = 30）和小（冠状动脉，壁厚1.25mm，n = 5），用熔融沉积建模（FDM）印有血管（刚性，n = 20 ）和PolyJet（Flexible，N = 15）技术进行高分辨率CT扫描。从所产生的DICOM（中医学中的数字成像和通信）数据集，使用专用3D工程软件与原始STL文件进行了生成的STL文件，壁厚以及表面一致性。对于冠状动脉型，大型主动脉型型号的平均壁厚为2.11μm（+ 5％），1.26μm（+ 0.8％），导致所有35个3D模型的总体平均壁厚+ 5％与原始STL文件相比。对于所有型号，发现平均表面偏差为+120μm，对于冠状动脉3D模型分别为主动脉+100μm和+180μm。发现两种印刷技术符合目前设定的精度标准（<1毫米），表明使用刚性和柔性聚合物的FDM和多胶印技术可以产生大小血管解剖结构的精确3D模型。

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