与微计算机断层扫描相比,三维表面扫描的地形和形状分析的准确性

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
AF Ridel , N.P. Bothma , L. Liebenberg , AC Oettle , EN L'Abbe
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引用次数: 0

摘要

南非每年记录的大量不明尸体,加上人口的巨大异质性,需要开发创新的法医分析方法,结合南非群体的差异。尽管骨病学和人类学中存在相当大的三维(3D)扫描模式,但开发涉及3D扫描的新的先进方法和技术以用于真实的法医应用,需要考虑到方法的可访问性、实用性,更重要的是,还需要考虑方法的准确性。为此,本研究旨在评估基于3D表面扫描的地形和形状分析与金标准微聚焦X射线计算机断层扫描(micro-XCT)重建的可靠性,以评估群体亲和力。从南非比勒陀利亚大学比勒陀利亚骨采集中心(PBC)采集了44个成人颅骨。从每个颅骨获得两组3D重建,即微XCT扫描和3D表面扫描。从两种扫描模式中获取三维重建和地标数据集,并使用再现性测试、几何差异和形状分析进行比较。在重建之间观察到的最小几何差异表明,两种模式将提供相似的形状标志数据集,并且可以在不影响期末分析准确性的情况下使用。统计结果显示,使用几何形态计量方法(GMM)在两种模式中分析的与群体亲和力相关的面部中部形状变化相似。将多种3D扫描模式和先进的GMM纳入现有的生物剖面估计中,将使南非法医人类学家能够以更准确和可重复的方式分析与形状相关的骨骼变化,并在法医案件中提供有效的生物剖面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The accuracy of topographical and shape analysis using three-dimensional surface scanning compared to Micro-Computed Tomography

The high number of unidentified bodies recorded in South Africa annually, combined with substantial heterogeneity within the population, necessitates that innovative forensic analysis methods be developed that incorporate variations from South African groups. Although sizeable three-dimensional (3D) scanning modalities exist in osteology and anthropology, developing new advanced methods and techniques involving 3D scanning for real-life forensic applications require that the accessibility, practicality, and, more importantly, accuracy of the methods be taken into consideration. To this end, this study aimed to assess the reliability of 3D surface scanning-based topographical and shape analysis comparison to gold standard micro-focus X-ray computed tomography (micro-XCT) reconstructions for estimating population affinity.

Forty-four adult crania were collected from the Pretoria Bone Collection (PBC), University of Pretoria, South Africa. Two sets of 3D reconstructions were acquired from each cranium, namely micro-XCT scans and 3D surface scans. Three-dimensional reconstructions and landmark datasets were acquired from both scanning modalities and compared using reproducibility testing, geometric discrepancies, and shape analysis.

The minimal geometric discrepancies observed between the reconstructions suggest that both modalities will provide similar shape landmarks datasets and can be used without compromising the accuracy of the analyses at term. The statistical findings showed similar population affinity-related mid-facial shape variations analyzed across both modalities using geometric morphometric methods (GMM).

Incorporating multiple 3D scanning modalities and advanced GMM into the existing biological profile estimation will allow South African forensic anthropologists to analyze shape-related skeletal variation in a more accurate and repeatable way and provide an efficient biological profile in forensic cases.

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来源期刊
Forensic Imaging
Forensic Imaging RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
2.20
自引率
27.30%
发文量
39
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