Surface Curvature of Pelvic Joints from Three Laser Scanners: Separating Anatomy from Measurement Error

Villa, Chiara; Gaudio, Daniel; Cattaneo, Cristina; Buckberry, Jo; Wilson, A. S.; Lynnerup, Niels

doi:10.1111/1556-4029.12696

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…However, we should not forget that reproducibility of the quantitative analysis among instruments should be tested, as the performance parameters of each laser scanner and the scanning setting of the CT scanner may influence the mathematical outcome of the 3D models (Villa et al. ; Algee‐Hewitt & Wheat, ).…”

Section: The Application Of Mathematical Methods On 3d Modelsmentioning

confidence: 99%

“…These four papers have explored the possibility of an objective quantitative approach rather than the more traditional subjective/visual way, demonstrating that comparable, if not better, results can be obtained. However, we should not forget that reproducibility of the quantitative analysis among instruments should be tested, as the performance parameters of each laser scanner and the scanning setting of the CT scanner may influence the mathematical outcome of the 3D models (Villa et al 2015b;Algee-Hewitt & Wheat, 2016).…”

Section: The Direct Assessment Of Ct Image Informationmentioning

confidence: 99%

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Evaluating osteological ageing from digital data

2016

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SummaryAge at death estimation of human skeletal remains is one of the key issues in constructing a biological profile both in forensic and archaeological contexts. The traditional adult osteological methods evaluate macroscopically the morphological changes that occur with increasing age of specific skeletal indicators, such as the cranial sutures, the pubic bone, the auricular surface of the ilium and the sternal end of the ribs. Technologies such as CT and laser scanning are becoming more widely used in anthropology, and several new methods have been developed. This review focuses on how the osteological age-related changes have been evaluated in digital data. Firstly, the 3D virtual copies of the bones have been used to mimic the appearance of the dry bones and the application of the traditional methods. Secondly, the information directly extrapolated from CT scan has been used to qualitatively or quantitatively assess the changes of the trabecular bones, the thickness of the cortical bones, and to perform morphometric analyses. Lastly, the most innovative approach has been the mathematical quantification of the changes of the pelvic joints, calculating the complexity of the surface. The importance of new updated reference datasets, created thanks to the use of CT scanning in forensic settings, is also discussed.

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Section: The Application Of Mathematical Methods On 3d Modelsmentioning

confidence: 99%

Section: The Direct Assessment Of Ct Image Informationmentioning

confidence: 99%

Evaluating osteological ageing from digital data

2016

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“…However, the consistency of outputs from different devices for biological profile estimation needs to be tested. This has not yet been sufficiently explored, except for a few exceptions, such as the aforementioned study of Villa et al [42].…”

Section: Scanning -Problem Of Compatibilitymentioning

confidence: 99%

“…Villa et al [42] raised an important question whether the results of surface quantification used for age estimation from different laser scanners are comparable. The precision and repeatability of measurements among different scanning devices are necessary in order to ensure the reliability of biological profile estimation methods.…”

Section: Introductionmentioning

confidence: 99%

Impact of 3D surface scanning protocols on the Os coxae digital data: Implications for sex and age-at-death assessment

Kotěrová

Králík

Rmoutilová

et al. 2019

Journal of Forensic and Legal Medicine

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The 3D imaging technologies became of paramount importance for example in disciplines such as forensic anthropology and bioarchaeology where they are being used more and more frequently.There is a number of new possibilities that they offer, for instance an easier and faster sharing of data among institutions, a possibility of permanent documentation, or new opportunities of data analysis. An important requirement, however, is whether the data obtained from different scanning devices are comparable and whether the possible varying outputs could affect further analyses, such as estimation of the biological profile. Therefore, we aimed to investigate two important questions:(1) whether 3D models acquired by two different scanning technologies (structured light and laser) are comparable and (2) whether the scanning equipment has an effect on the anthropological analyses, such as age-at-death estimation and sex assessment.3D models of ossa coxa (n=29) were acquired by laser (NextEngine) and structured light (HP 3D Structured Light Scanner PRO 2) scanners. Resulting 3D models from both scanners were subjected to age-at-death analyses (via quantitative method of Stoyanova et al., 2017) and sex analyses (via Diagnose Sexuelle Probabiliste 2 of Brůžek et al., 2017). Furthermore, high quality scans of small sample (n=5) of pubic symphyseal surface with RedLux Profiler device were acquired as reference surfaces to which the outputs from both scanners were compared. Small deviations between surfaces were more evident in more rugged surfaces (in areas of depression and protrusion). Even though small differences from the reference surfaces were found they did not have significant effect on age and sex estimates. It never resulted in opposite sex assignment and no significant differences were observed between age estimates (with the exception of TPS/BE model).

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“…From reserach [9] and also from experience we know that the curvature and complexity of the surface affects the accuracy of digitization, i.e. it is directly related to the resolution of the scanner and the size of the object to be digitized.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Curvature Influence on 3D Scanning Accuracy of Dental Castings

Šimunić¹,

Lulić²,

Groš³

et al. 2021

Interdisciplinary Description of Complex Systems

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The main goal of this study is determining the influence of surface curvature on 3D scanning accuracy of dental castings. The hypothesis is that 3D scanning errors occur on the geometry (surfaces) of a higher curvature on the dental anatomy. Ten dental castings (five mandibular and five maxillar) were 3D scanned with four different dental 3D scanners. As a reference device Atos Core industrial 3D scanner was used. Using a qualitative-quantitative approach of dividing every tooth in three areas (OSocclusal surface, CSBcrown surface buccal side, CSPcrown surface palatal side) and observing the frequency of maximal deviation for each area a deviation map was obtained, which shows on what area, are the biggest deviations and in which frequency they emerge. In total 160 teeth were analysed. To conclude, 3D scanning errors occur more frequently on the geometry (surfaces) of a higher curvature on the dental anatomy. Future work suggests conducting a full numerical analysis to find a correlation between the accuracy of 3D scanned teeth surface and a surface curvature. Comparing the 3D scanning deviation to the calculated curvature of the surface could unveil which curvature is hard to 3D scan and generates errors.

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Surface Curvature of Pelvic Joints from Three Laser Scanners: Separating Anatomy from Measurement Error

Cited by 11 publications

References 19 publications

Evaluating osteological ageing from digital data

Evaluating osteological ageing from digital data

Impact of 3D surface scanning protocols on the Os coxae digital data: Implications for sex and age-at-death assessment

Analysis of Surface Curvature Influence on 3D Scanning Accuracy of Dental Castings

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