根据计算机断层扫描数据评估通过增材制造复制三维模型引起的几何偏差
- 作者: Shirshin A.V.1,2, Zheleznyak I.S.1, Malakhovsky V.N.1, Kushnarev S.V.1, Gorina N.S.1
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隶属关系:
- Kirov Military Medical Academy
- ITMO University
- 期: 卷 2, 编号 3 (2021)
- 页面: 277-288
- 栏目: 技术说明
- URL: https://journals.rcsi.science/DD/article/view/63680
- DOI: https://doi.org/10.17816/DD63680
- ID: 63680
如何引用文章
详细
论证。三维建模和三维打印技术现已在临床和基础医学的各个领域得到应用,主要是在外科领域。谈到外科医生的术前准备,印刷品与患者解剖结构的一致性可以在评估病变和纠正病变的方法方面发挥重要作用。确定所得模型大小的偏差与伦理和技术困难有关,这些困难分别与确定标准和进行大量测量的需要相关。 本文中我们建议使用具有预定尺寸的几何图形作为参考,并使用通过原型制作获得的多边形网格的每个顶点的最近点的迭代算法来估计线性偏差。
目标是通过三维建模(基于计算机断层扫描数据)和增材制造来评估模拟骨组织的物体复制时出现的几何偏差。
材料与方法为了创建初始对象,使用了 FreeCAD 程序,在 Blender 和 Meshmixer 程序中编辑多边形网格。 这些模型是在含有铜颗粒的 BFCopper PLA 的 Ender-3 打印机上进行 3D 打印的。 使用飞利浦 Ingenuity CT 128 层 CT 扫描仪进行扫描。 将一系列断层图像加载到 3D Slicer 程序中,使用自动(阈值为 500 HU、0 HU、-500 HU、-750 HU)和手动分割的方法创建虚拟模型. 原始模型和复制模型的比较是基于 CloudCompare 程序中最近点的迭代算法进行的。
结果。根据分割方法的不同,复制模型的体积超过相应原始模型的体积 1-27%。 复制模型的多边形网格与原始模型的线性偏差平均值为 0.03-0.41 毫米。 使用斯皮尔曼等级相关系数比较线性偏差和模型体积变化的积分和的值显示它们之间存在显着相关性(ρ = 0.83; temp=5.27,p=0.05)。
结论。再现对象的几何参数不可避免地会发生变化,失真更多地取决于所选的分割方法,而不是模型或其零件的总体比例。 使用手动分割方法会导致线性尺寸的更大失真(与自动分割方法相比),但它允许您保留所有必要的解剖结构。
作者简介
Aleksandr V. Shirshin
Kirov Military Medical Academy; ITMO University
编辑信件的主要联系方式.
Email: asmdot@gmail.com
ORCID iD: 0000-0002-1494-9626
SPIN 代码: 4412-0498
俄罗斯联邦, 6G, Akademika Lebedeva street, Saint-Petersburg, 194044; 49, Kronverksky pr., St. Petersburg, 197101
Igor S. Zheleznyak
Kirov Military Medical Academy
Email: igzh@bk.ru
ORCID iD: 0000-0001-7383-512X
SPIN 代码: 1450-5053
MD, Dr. Sci. (Med.), Assistant Professor
俄罗斯联邦, 6G, Akademika Lebedeva street, Saint-Petersburg, 194044Vladimir N. Malakhovsky
Kirov Military Medical Academy
Email: malakhovskyvova@gmail.com
ORCID iD: 0000-0002-0663-9345
SPIN 代码: 2014-6335
MD, Dr. Sci. (Med.), Professor
俄罗斯联邦, 6G, Akademika Lebedeva street, Saint-Petersburg, 194044Sergei V. Kushnarev
Kirov Military Medical Academy
Email: S.v.kushnarev@yandex.ru
ORCID iD: 0000-0003-2841-2990
SPIN 代码: 5859-0480
MD, Cand. Sci. (Med.)
俄罗斯联邦, 6G, Akademika Lebedeva street, Saint-Petersburg, 194044Natalia S. Gorina
Kirov Military Medical Academy
Email: natali_bgmu@mail.ru
ORCID iD: 0000-0002-6220-8195
SPIN 代码: 8175-6746
俄罗斯联邦, 6G, Akademika Lebedeva street, Saint-Petersburg, 194044
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