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Stantis C, Schaefer BJ, Correia MA, Alaica AK, Huffer D, Plomp E, Di Giusto M, Chidimuro B, Rose AK, Nayak A, Kendall EJ. Ethics and applications of isotope analysis in archaeology. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024:e24992. [PMID: 38949078 DOI: 10.1002/ajpa.24992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 06/03/2024] [Accepted: 06/16/2024] [Indexed: 07/02/2024]
Abstract
This synthesis explores specific ethical questions that commonly arise in isotopic analysis. For more than four decades, isotope analysis has been employed in archeological studies to explore past human and animal dietary habits, mobility patterns, and the environment in which a human or animal inhabited during life. These analyses require consideration of ethical issues. While theoretical concepts are discussed, we focus on practical aspects: working with descendant communities and other rights holders, choosing methods, creating and sharing data, and working mindfully within academia. These layers of respect and care should surround our science. This paper is relevant for specialists in isotope analysis as well as those incorporating these methods into larger projects. By covering the whole of the research process, from design to output management, we appeal broadly to archaeology and provide actionable solutions that build on the discussions in the general field.
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Affiliation(s)
- Chris Stantis
- Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, USA
| | - Benjamin J Schaefer
- Department of Anthropology, Gender and Women's Studies, and Latin American and Latino Studies, University of Illinois at Chicago, Chicago, Illinois, USA
- The Center for the Recovery and Identification of the Missing, University of Illinois at Chicago, Chicago, Illinois, USA
- Division of Anthropology, The Field Museum of Natural History, Chicago, Illinois, USA
| | - Maria Ana Correia
- Interdisciplinary Center for Archaeology and the Evolution of Human Behaviour (ICArEHB), Universidade do Algarve, Algarve, Portugal
- Laboratório de Arqueologia e Antropologia Ambiental e Evolutiva, Universidade de São Paulo, Sao Paulo, Brazil
| | - Aleksa K Alaica
- Department of Anthropology, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Damien Huffer
- Department of History, Carleton University, Ottawa, Ontario, Canada
- School of Social Sciences, University of Queensland, Saint Lucia, Queensland, Australia
- The Alliance to Counter Crime Online, Washington, DC, USA
| | - Esther Plomp
- Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands
| | - Marina Di Giusto
- Museu de Arqueologia e Etnologia, Universidade de São Paulo, Sao Paulo, Brazil
| | - Blessing Chidimuro
- Department of Geography and Environmental Science, University of Reading, Reading, UK
| | - Alice K Rose
- Department of Archaeology, Durham University, Durham, UK
| | - Ayushi Nayak
- Department of Archaeology, Max Planck Institute of Geoanthropology, Jena, Germany
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Cappella A, Palamenghi A, Solazzo R, Mazzarelli D, Gibelli D, Sforza C, Cattaneo C. An exclusionary screening method based on 3D morphometric features to sort commingled atlases and axes. Sci Rep 2024; 14:13149. [PMID: 38849396 PMCID: PMC11161482 DOI: 10.1038/s41598-024-63029-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 05/23/2024] [Indexed: 06/09/2024] Open
Abstract
In forensic commingled contexts, when the disarticulation occurs uniquely at the atlantoaxial joint, the correct match of atlas and axis may lead to the desirable assembly of the entire body. Notwithstanding the importance of this joint in such scenarios, no study has so far explored three-dimensional (3D) methodologies to match these two adjoining bones. In the present study, we investigated the potential of re-associating atlas and axis through 3D-3D superimposition by testing their articular surfaces congruency in terms of point-to-point distance (Root Mean Square, RMS). We analysed vertebrae either from the same individual (match) and from different individuals (mismatch). The RMS distance values were assessed for both groups (matches and mismatches) and a threshold value was determined to discriminate matches with a sensitivity of 100%. The atlas and the corresponding axis from 41 documented skeletons (18 males and 23 females), in addition to unpaired elements (the atlas or the axis) from 5 individuals, were superimposed, resulting in 41 matches and 1851 mismatches (joining and non-joining elements). No sex-related significant differences were found in matches and mismatches (p = 0.270 and p = 0.210, respectively), allowing to pool together the two sexes in each group. RMS values ranged between 0.41 to 0.77 mm for matches and between 0.37 and 2.18 mm for mismatches. Significant differences were found comparing the two groups (p < 0.001) and the highest RMS of matches (0.77 mm) was used as the discriminative value that provided a sensitivity of 100% and a specificity of 41%. In conclusion, the 3D-3D superimposition of the atlanto-axial articular facets cannot be considered as a re-association method per se, but rather as a screening one. However, further research on the validation of the 3D approach and on its application to other joints might provide clues to the complex topic of the reassociation of crucial adjoining bones.
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Affiliation(s)
- Annalisa Cappella
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133, Milan, Italy.
- U.O. Laboratorio di Morfologia Umana Applicata, IRCCS Policlinico San Donato, 20097, San Donato Milanese, Italy.
| | - Andrea Palamenghi
- LABANOF, Laboratorio di Antropologia e Odontologia Forense, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 37, 20133, Milan, Italy.
- LAFAS, Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133, Milan, Italy.
| | - Riccardo Solazzo
- LAFAS, Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133, Milan, Italy
| | - Debora Mazzarelli
- LABANOF, Laboratorio di Antropologia e Odontologia Forense, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 37, 20133, Milan, Italy
| | - Daniele Gibelli
- LAFAS, Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133, Milan, Italy
| | - Chiarella Sforza
- LAFAS, Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133, Milan, Italy
| | - Cristina Cattaneo
- LABANOF, Laboratorio di Antropologia e Odontologia Forense, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Luigi Mangiagalli 37, 20133, Milan, Italy
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Mori T, Riga A, Aytek AI, Harvati K. Virtual reconstruction and geometric morphometric analysis of the Kocabaş hominin fossil from Turkey: Implications for taxonomy and evolutionary significance. J Hum Evol 2024; 191:103517. [PMID: 38781712 DOI: 10.1016/j.jhevol.2024.103517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 11/24/2023] [Accepted: 02/26/2024] [Indexed: 05/25/2024]
Abstract
The Kocabaş specimen comes from a travertine quarry near the homonymous village in the Denizli basin (Turkey). The specimen comprises three main fragments: portions of the right and left parietal and left and right parts of the frontal bone. The fossil was assumed to belong to the Homo erectus s.l. hypodigm by some authors, whereas others see similarities with Middle Pleistocene fossils (Broken Hill 1/Kabwe, Bodo, or Ceprano). Here, we present the first attempt to make a complete reconstruction of the missing medial portion of the frontal bone and a comprehensive geometric morphometric analysis of this bone. We restored the calotte by aligning and mirroring the three preserved fragments. Afterward, we restored the missing portion by applying the thin-plate spline interpolation algorithm of target fossils onto the reconstructed Kocabaş specimen. For the geometric morphometric analyses, we collected 80 landmarks on the frontal bone (11 osteometric points, 14 bilateral curve semilandmarks, and 41 surface semilandmarks). The comparative sample includes 21 fossils from different chronological periods and geographical areas and 30 adult modern humans from different populations. Shape analyses highlighted the presence in Kocabaş of features usually related to Middle Pleistocene Homo, such as a developed supraorbital torus associated with a relatively short frontal squama and reduced post-toral sulcus. Cluster analysis and linear discriminant analysis classification procedure suggest Kocabaş being part of the same taxonomic unit of Eurasian and African Middle Pleistocene Homo. In light of our results, we consider that attributing the Kocabaş hominin to H. erectus s.l. may be unwarranted. Results of our analyses are compatible with different evolutionary scenarios, but a more precise chronological framework is needed for a thorough discussion of the evolutionary significance of this specimen. Future work should clarify its geological age, given uncertainties regarding its stratigraphic provenance.
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Affiliation(s)
- Tommaso Mori
- Paleoanthropology, Institute for Archaeological Sciences and Senckenberg Centre for Human Evolution and Palaeoenvironment, Eberhard Karls University of Tübingen, Rümelinstraasse 23, 72072, Tübingen, Germany; Anthropology Laboratory, Department of Biology, University of Florence, Via del Proconsolo 12, 50122, Florence, Italy.
| | - Alessandro Riga
- Anthropology Laboratory, Department of Biology, University of Florence, Via del Proconsolo 12, 50122, Florence, Italy
| | - Ahmet Ihsan Aytek
- Department of Anthropology, Burdur Mehmet Akif Ersoy University, Faculty of Arts and Science, TR-15030, Burdur, Turkey
| | - Katerina Harvati
- Paleoanthropology, Institute for Archaeological Sciences and Senckenberg Centre for Human Evolution and Palaeoenvironment, Eberhard Karls University of Tübingen, Rümelinstraasse 23, 72072, Tübingen, Germany; DFG Centre for Advanced Studies "Words, Bones, Genes, Tools", Eberhard Karls University of Tübingen, Rümelinstraasse 23, 72072, Tübingen, Germany
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Micarelli I, Tafuri MA, Tilley L. Disability and care in Western Europe during Medieval times: A bioarchaeological perspective. INTERNATIONAL JOURNAL OF PALEOPATHOLOGY 2024; 44:119-125. [PMID: 38325146 DOI: 10.1016/j.ijpp.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/24/2024] [Accepted: 01/27/2024] [Indexed: 02/09/2024]
Abstract
This Special Issue has its foundation in presentations delivered in the symposium Disability and Care in Medieval Times: a Bioarchaeological Perspective into Health-related Practices held at the 2019 European Association of Archaeologists conference in Switzerland. It comprises 12 papers, all relevant to aspects of pathology experience and/or care provision in Western Europe during the Early to Late Middle Ages (500 - 1500 CE). Reflecting the 1000 year timespan involved, these papers are characterised by diversity in subject matter and in the lifeways in which they are located, but all contribute to the symposium's primary aim: to demonstrate that our understanding of the Medieval period is enhanced by cross-disciplinary, bioarchaeological research into individual and collective experiences of disability and care. This Introduction provides the background to the 2019 symposium, and briefly discusses the papers contained in the Special Issue which emerged from this.
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Affiliation(s)
- Ileana Micarelli
- McDonald Institute for Archaeological Research, University of Cambridge, Downing St, Cambridge CB2 3ER, UK.
| | - Mary Anne Tafuri
- Department of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Roma, Italy.
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Prevost A, Muller S, Lauwers F, Heuzé Y. Quantification of global orbital shape variation. Clin Anat 2023; 36:1066-1074. [PMID: 36648017 DOI: 10.1002/ca.24007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 01/18/2023]
Abstract
The complex anatomy of the orbit generates a complex orbital shape that can only be quantified approximatively by classic linear measurements such as maximum width and height. There is no global three-dimensional quantification of variations in orbital shape. The purpose of this study was to develop a method to quantify a global three-dimensional orbital shape variation in a healthy population and to test a series of explanatory factors. We investigated the hypotheses that orbital shape is related to gender(H1), orbital size(H2) and/or age(H3). Medical computed tomography(CT) images of 60 adult individuals were studied. The study sample consisted of 30 males and 30 females with a mean age of 25.1 years. Four anatomical landmarks and 140 semi-landmarks were measured on both positive and negative 3D reconstructed orbits and analyzed with geometric morphometrics. A principal component analysis(PCA) was computed to define a morphological space. Shape variation was visualized using vector distance maps and diagrams. The greatest variation was seen in the length of the superior orbital fissure. There was a gradient in terms of orbital shape ranging from short, wide orbits to tall, narrow orbits. The analysis did not highlight any significant age-, gender- or size-related impact in terms of orbital shape variation. Future avenues to explore include the study of other potential explanatory factors such as the different embryological origins of the orbital bones, the passage of vessels and nerves, and ethnic origins. This method can also be applied to the study of pathological orbits.
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Affiliation(s)
- Alice Prevost
- Plastic and Maxillo-facial Surgery Department, University Hospital Center of Toulouse, Toulouse, France
| | - Samuel Muller
- Plastic and Maxillo-facial Surgery Department, Ramsay Santé Clinique de l'Union, Toulouse, France
| | - Frédéric Lauwers
- Plastic and Maxillo-facial Surgery Department, University Hospital Center of Toulouse, Toulouse, France
| | - Yann Heuzé
- Univ. Bordeaux, CNRS, MC, PACEA, Pessac, France
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Passalboni C, Taverne M, Lopez R, Rotenberg M, Lauwers F, Prevost A. Characterization of labiomandibular movements induced after isolated LeFort I osteotomy in the surgical management of class III malocclusion. PLoS One 2023; 18:e0292391. [PMID: 37812623 PMCID: PMC10561870 DOI: 10.1371/journal.pone.0292391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/19/2023] [Indexed: 10/11/2023] Open
Abstract
INTRODUCTION Maxillary surgery alone can be proposed for the surgical management of class III malocclusion, but anticipating outcomes for the labiomental muscle complex is challenging due to the mandibular autorotation phenomenon. The objective of this study was to quantify the mandibular and labiomental movements induced by maxillary osteotomy alone in the management of class III malocclusion according to different clinical and surgical variables. METHODS The post-operative changes in mandibular and labiomental shapes were studied by geometric morphometry from the pre- and post-operative lateral cephalometric radiograph of 25 patients. The explanatory variables tested were maxillary advancement, maxillary rotation, and divergence. RESULTS Soft tissues repositioning are different from postoperative mandibular repositioning after maxillary osteotomy. Neuromuscular adjustments of mandible depend on divergence and the maxillary rotation. Labiomental response only depends on divergence. CONCLUSION The surgical procedure does not have the same bone-related and musculocutaneous effects on patients with the same class III malocclusion. It is therefore essential for surgeons to understand the effects of their procedure on musculocutaneous tissues in order to best anticipate post-operative outcomes.
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Affiliation(s)
- Chris Passalboni
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Maxime Taverne
- Craniofacial Growth and Form Laboratory, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Raphael Lopez
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Maxime Rotenberg
- Dental Faculty, Department of Orthodontics, Toulouse University Hospital Center, Toulouse, France
| | - Frédéric Lauwers
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Alice Prevost
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
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Carew RM, French J, Morgan RM. Drilling down into ethics: A thematic review of ethical considerations for the creation and use of 3D printed human remains in crime reconstruction. Sci Justice 2023; 63:330-342. [PMID: 37169458 DOI: 10.1016/j.scijus.2023.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/01/2023] [Accepted: 03/20/2023] [Indexed: 04/03/2023]
Abstract
The existing literature contains some exploration of the ethics concerning human remains in forensic and virtual anthropology. However, previous work has stopped short of interrogating the underlying ethical concepts. The question of how people understand and apply these concepts in practice, and what it means to act ethically, remain underexplored. This thematic review explores the ethical considerations that contribute to the creation and use of 3D printed human remains for forensic purposes. The three main branches of ethical theory are outlined to explore how they may apply to forensic practice. Key themes relating to 3D printing human remains in forensic contexts were explored to better understand the ethics landscape, ethical challenges, and the current guidelines in place. Through this thematic review, nine ethics principles were identified as key principles for guiding best practice: anonymity, autonomy, beneficence, consent, context, justice, non-maleficence, proportionality, and transparency. It is suggested that these principles could be incorporated into adaptable guidelines going forward to support ethical practice. The findings also suggest that holistic ethics cognition training may have value in supporting forensic scientists in ethical decision-making, together with procedural and structural design that may promote best practice and reduce cognitive load.
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Forensic age estimation: comparison and validation of the Iscan method in 3D reconstructions using a surface scanner in a Spanish population. Int J Legal Med 2023; 137:773-785. [PMID: 36930377 PMCID: PMC10085965 DOI: 10.1007/s00414-023-02983-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/04/2023] [Indexed: 03/18/2023]
Abstract
When investigating a death, post-mortem identification provides with results of great legal and humanitarian significance. The effectiveness of the methods used to estimate age depends on the reference population, considering variables such as sex and ancestry. The aim of this study was to validate the Iscan method to estimate age in a Spanish forensic population, comparing the estimates obtained in dry bones and 3D reconstructions created with a surface scanner. We carried out a cross-sectional study on 109 autopsied corpses (67% male), scanning the sternal end of the right fourth rib in a 3D mesh, using an EinScan-Pro® surface scanner (precision: 0.05 mm). Two observers estimated the phases in dry bones and 3D images according to the Iscan method and to the sex of the subject. The mean age was 57.73 years (SD = 19.12 years;18-93 years). The intra-observer agreement was almost perfect in bones (κ = 0.877-0.960) and 3D images (κ = 0.954), while the inter-observer agreement was almost perfect in bones (κ = 0.813) and substantial in 3D images (κ = 0.727). The correlation with the Iscan phases was very strong in bones (Rho = 0.794-0.820; p < 0.001) and strong in 3D images (Rho = 0.690-0.691; p < 0.001). Both sex-adjusted linear regression models were significant (dry bones: R2 = 0.65; SEE = ± 11.264 years; 3D images: R2 = 0.50; SEE = ± 13.537 years) from phase 4 onwards. An overestimation of age was observed in the first phases, and an underestimation in the later ones. Virtual analysis using a surface scanner in the fourth rib is a valid means of estimating age. However, the error values and confidence intervals were considerable, so the joint use of different methods and anatomical sites is recommended.
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Buzi C, Profico A, Liang C, Khonsari RH, O'Higgins P, Moazen M, Harvati K. Icex: Advances in the automatic extraction and volume calculation of cranial cavities. J Anat 2023; 242:1172-1183. [PMID: 36774197 PMCID: PMC10184549 DOI: 10.1111/joa.13843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 01/17/2023] [Accepted: 01/20/2023] [Indexed: 02/13/2023] Open
Abstract
The use of non-destructive approaches for digital acquisition (e.g. computerised tomography-CT) allows detailed qualitative and quantitative study of internal structures of skeletal material. Here, we present a new R-based software tool, Icex, applicable to the study of the sizes and shapes of skeletal cavities and fossae in 3D digital images. Traditional methods of volume extraction involve the manual labelling (i.e. segmentation) of the areas of interest on each section of the image stack. This is time-consuming, error-prone and challenging to apply to complex cavities. Icex facilitates rapid quantification of such structures. We describe and detail its application to the isolation and calculation of volumes of various cranial cavities. The R tool is used here to automatically extract the orbital volumes, the paranasal sinuses, the nasal cavity and the upper oral volumes, based on the coordinates of 18 cranial anatomical points used to define their limits, from 3D cranial surface meshes obtained by segmenting CT scans. Icex includes an algorithm (Icv) for the calculation of volumes by defining a 3D convex hull of the extracted cavity. We demonstrate the use of Icex on an ontogenetic sample (0-19 years) of modern humans and on the fossil hominin crania Kabwe (Broken Hill) 1, Gibraltar (Forbes' Quarry) and Guattari 1. We also test the tool on three species of non-human primates. In the modern human subsample, Icex allowed us to perform a preliminary analysis on the absolute and relative expansion of cranial sinuses and pneumatisations during growth. The performance of Icex, applied to diverse crania, shows the potential for an extensive evaluation of the developmental and/or evolutionary significance of hollow cranial structures. Furthermore, being open source, Icex is a fully customisable tool, easily applicable to other taxa and skeletal regions.
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Affiliation(s)
- Costantino Buzi
- DFG Centre of Advanced Studies 'Words, Bones, Genes, Tools', Eberhard Karls University of Tübingen, Tübingen, Germany.,Institut Català de Paleoecologia Humana i Evolució Social (IPHES-CERCA), Tarragona, Spain.,Departament d'Història i Història de l'Art, Universitat Rovira i Virgili, Tarragona, Spain
| | | | - Ce Liang
- Department of Mechanical Engineering, University College London, London, UK
| | - Roman H Khonsari
- Department of Mechanical Engineering, University College London, London, UK.,Department of Maxillo-Facial Surgery and Plastic Surgery, Necker - Enfants Malades University Hospital, Assistance Publique - Hôpitaux de Paris, Paris, France
| | - Paul O'Higgins
- Department of Archaeology and Hull York Medical School, University of York, York, UK
| | - Mehran Moazen
- Department of Mechanical Engineering, University College London, London, UK
| | - Katerina Harvati
- DFG Centre of Advanced Studies 'Words, Bones, Genes, Tools', Eberhard Karls University of Tübingen, Tübingen, Germany.,Paleoanthropology, Senckenberg Centre for Human Evolution and Palaeoenvironment, Institute for Archaeological Sciences, Eberhard Karls University of Tübingen, Tübingen, Germany
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Cazenave M, Kivell TL. Challenges and perspectives on functional interpretations of australopith postcrania and the reconstruction of hominin locomotion. J Hum Evol 2023; 175:103304. [PMID: 36563461 DOI: 10.1016/j.jhevol.2022.103304] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 12/24/2022]
Abstract
In 1994, Hunt published the 'postural feeding hypothesis'-a seminal paper on the origins of hominin bipedalism-founded on the detailed study of chimpanzee positional behavior and the functional inferences derived from the upper and lower limb morphology of the Australopithecus afarensis A.L. 288-1 partial skeleton. Hunt proposed a model for understanding the potential selective pressures on hominins, made robust, testable predictions based on Au. afarensis functional morphology, and presented a hypothesis that aimed to explain the dual functional signals of the Au. afarensis and, more generally, early hominin postcranium. Here we synthesize what we have learned about Au. afarensis functional morphology and the dual functional signals of two new australopith discoveries with relatively complete skeletons (Australopithecus sediba and StW 573 'Australopithecus prometheus'). We follow this with a discussion of three research approaches that have been developed for the purpose of drawing behavioral inferences in early hominins: (1) developments in the study of extant apes as models for understanding hominin origins; (2) novel and continued developments to quantify bipedal gait and locomotor economy in extant primates to infer the locomotor costs from the anatomy of fossil taxa; and (3) novel developments in the study of internal bone structure to extract functional signals from fossil remains. In conclusion of this review, we discuss some of the inherent challenges of the approaches and methodologies adopted to reconstruct the locomotor modes and behavioral repertoires in extinct primate taxa, and notably the assessment of habitual terrestrial bipedalism in early hominins.
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Affiliation(s)
- Marine Cazenave
- Division of Anthropology, American Museum of Natural History, New York, USA; Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK; Department of Anatomy, Faculty of Health Sciences, University of Pretoria, South Africa.
| | - Tracy L Kivell
- Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK; Centre for the Exploration of the Deep Human Journey, University of the Witwatersrand, Johannesburg, South Africa
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3D-3D Superimposition of Pubic Bones: Expanding the Anthropological Toolkit for the Pair-Matching of Commingled Skeletal Remains. BIOLOGY 2022; 12:biology12010030. [PMID: 36671723 PMCID: PMC9855679 DOI: 10.3390/biology12010030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022]
Abstract
Virtual anthropology (VA) has recently produced an additional tool for the analysis of commingled remains and is based on the distance analysis between three-dimensional (3D) models of bones. To date, the pair-matching of the innominate bone through a 3D approach remains partially unexplored. Here, 44 abdominal CT scans (22 males and 22 females) were selected from a hospital database, and the pubic bones were segmented through ITK-SNAP software. The models were hollowed with Viewbox4 to minimize the amount of trabecular bone. The left pubic bones were mirrored and superimposed on the right ones, according to the smallest point-to-point difference between the two surfaces through VAM software. RMS distances between models were calculated through VAM, producing RMS values for 20 matches and 420 mismatches for each sex group. Differences in RMS distance values between matches and mismatches were investigated through Mann−Whitney tests (p < 0.05); the repeatability of the procedure was assessed through absolute and relative technical error measurement (TEM and rTEM). RMS distance values of matches and mismatches were significantly different (p < 0.01) in both groups. The method yielded optimal results with high sensitivity (100.0%) and specificity (99.8% in males, 98.8% in females) rates according to the chosen threshold. This project contributes to the research field of VA with a valuable adjunct that may bolster and strengthen the results of the current visual and osteometric methods through a multidisciplinary approach.
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Oriola LS, Oller NA, Martínez-Abadías N. Virtual Anthropology: Forensic applications to cranial skeletal remains from the Spanish Civil War. Forensic Sci Int 2022; 341:111504. [DOI: 10.1016/j.forsciint.2022.111504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 11/30/2022]
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Perricone V, Grun T, Raia P, Langella C. Paleomimetics: A Conceptual Framework for a Biomimetic Design Inspired by Fossils and Evolutionary Processes. Biomimetics (Basel) 2022; 7:biomimetics7030089. [PMID: 35892359 PMCID: PMC9326541 DOI: 10.3390/biomimetics7030089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/29/2022] [Accepted: 07/02/2022] [Indexed: 12/10/2022] Open
Abstract
In biomimetic design, functional systems, principles, and processes observed in nature are used for the development of innovative technical systems. The research on functional features is often carried out without giving importance to the generative mechanism behind them: evolution. To deeply understand and evaluate the meaning of functional morphologies, integrative structures, and processes, it is imperative to not only describe, analyse, and test their behaviour, but also to understand the evolutionary history, constraints, and interactions that led to these features. The discipline of palaeontology and its approach can considerably improve the efficiency of biomimetic transfer by analogy of function; additionally, this discipline, as well as biology, can contribute to the development of new shapes, textures, structures, and functional models for productive and generative processes useful in the improvement of designs. Based on the available literature, the present review aims to exhibit the potential contribution that palaeontology can offer to biomimetic processes, integrating specific methodologies and knowledge in a typical biomimetic design approach, as well as laying the foundation for a biomimetic design inspired by extinct species and evolutionary processes: Paleomimetics. A state of the art, definition, method, and tools are provided, and fossil entities are presented as potential role models for technical transfer solutions.
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Affiliation(s)
- Valentina Perricone
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
- Correspondence:
| | - Tobias Grun
- Department of Invertebrate Palaeontology, University of Florida, Florida Museum, Dickinson Hall, Gainesville, FL 32611, USA;
| | - Pasquale Raia
- Department of Earth Sciences, Environment and Resources, University of Naples Federico II, Via Vicinale Cupa Cintia 26, 80126 Napoli, Italy;
| | - Carla Langella
- Department of Architecture and Industrial Design, University of Campania Luigi Vanvitelli, Via San Lorenzo, 81031 Aversa, Italy;
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14
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Pietrobelli A, Sorrentino R, Notariale V, Durante S, Benazzi S, Marchi D, Belcastro MG. Comparability of skeletal fibulae surfaces generated by different source scanning (dual-energy CT scan vs. high resolution laser scanning) and 3D geometric morphometric validation. J Anat 2022; 241:667-682. [PMID: 35751880 PMCID: PMC9358749 DOI: 10.1111/joa.13714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/28/2022] Open
Abstract
This work aims to test accuracy and comparability of 3D models of human skeletal fibulae generated by clinical CT and laser scanner virtual acquisitions. Mesh topology, segmentation and smoothing protocols were tested to assess variation among meshes generated with different scanning methods and procedures, and to evaluate meshes‐interchangeability in 3D geometric morphometric analysis. A sample of 13 left human fibulae were scanned separately with Revolution Discovery CT dual energy (0.625 mm resolution) and ARTEC Space Spider 3D structured light laser scanner (0.1 mm resolution). Different segmentation methods, including half‐maximum height (HMH) and MIA‐clustering protocols, were compared to their high‐resolution standard generated with laser‐scanner by calculating topological surface deviations. Different smoothing algorithms were also evaluated, such as Laplacian and Taubin smoothing. A total of 142 semilandmarks were used to capture the shape of both proximal and distal fibular epiphyses. After Generalized Procrustes superimposition, the Procrustes coordinates of the proximal and distal fibular epiphyses were used separately to assess variation due to scanning methods and the operator error. Smoothing algorithms at low iteration do not provide significant variation among reconstructions, but segmentation protocol may influence final mesh quality (0.09–0.24 mm). Mean deviation among CT‐generated meshes that were segmented with MIA‐clustering protocol, and laser scanner‐generated ones, is optimal (0.42 mm, ranging 0.35–0.56 mm). Principal component analysis reveals that homologous samples scanned with the two methods cluster together for both the proximal and distal fibular epiphyses. Similarly, Procrustes ANOVA reveals no shape differences between scanning methods and replicates, and only 1.38–1.43% of shape variation is due to scanning device. Topological similarities support the comparability of CT‐ and laser scanner‐generated meshes and validate its simultaneous use in shape analysis with potential clinical relevance. We precautionarily suggest that dedicated trials should be performed in each study when merging different data sources prior to analyses.
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Affiliation(s)
- Annalisa Pietrobelli
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Rita Sorrentino
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy.,Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | | | - Stefano Durante
- IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.,IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S. Orsola, Bologna, Italy
| | - Stefano Benazzi
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Damiano Marchi
- Department of Biology, University of Pisa, Pisa, Italy.,Centre for the Exploration of the Deep Human Journey, University of the Witwatersrand, Johannesburg, South Africa
| | - Maria Giovanna Belcastro
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
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15
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Affiliation(s)
- Mark F Teaford
- Department of Basic Science, Touro University, Vallejo, CA 94592, USA.
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16
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Baca K, Bridge B, Snow M. Three-dimensional geometric morphometric sex determination of the whole and modeled fragmentary human pubic bone. PLoS One 2022; 17:e0265754. [PMID: 35385554 PMCID: PMC8985971 DOI: 10.1371/journal.pone.0265754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 03/08/2022] [Indexed: 11/18/2022] Open
Abstract
Sex determination of the human pelvis has traditionally been done through visual analyses of morphoscopic traits and there are limited metric methods available to forensic anthropologists to add metric credibility to these analyses. The goal of this research was to create an improved metric method using three-dimensional geometric morphometrics to determine sex from both whole and modeled fragmented human pubic bones. The sample consisted of n = 378 pubic bones from the University of New Mexico’s Maxwell Museum Documented Skeletal Collection and eight landmarks were collected from each bone. Statistical analyses and machine learning algorithms were used to predict the accuracy of the method’s ability to classify a bone as male or female on both whole and simulated fragmented remains; this included tests run on each possible landmark combination of three or more landmarks to simulate fragmented bones (218 combinations). The results of the whole bone analysis resulted in 95.35% testing accuracy. The results of the modeled fragmentary analysis consisted of 164 combinations which exhibit a 90% or higher accuracy in sex prediction; and twelve combinations which exhibit 96% or higher accuracy in sex prediction. In particular, two landmarks clustered around the ventral arc of the pubic bone performed the best, indicating this is the most sexually dimorphic portion of the bone. These results indicate that three-dimensional geometric morphometrics is a valid method to be applied to sex determination in forensic anthropology.
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Affiliation(s)
- Katherine Baca
- Department of Anthropology, University of Montana, Missoula, Montana, United States of America
- * E-mail:
| | - Brandon Bridge
- Department of Economics, University of Montana, Missoula, Montana, United States of America
| | - Meradeth Snow
- Department of Anthropology, University of Montana, Missoula, Montana, United States of America
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17
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Messer D, Atchapero M, Jensen MB, Svendsen MS, Galatius A, Olsen MT, Frisvad JR, Dahl VA, Conradsen K, Dahl AB, Bærentzen A. Using virtual reality for anatomical landmark annotation in geometric morphometrics. PeerJ 2022; 10:e12869. [PMID: 35186472 PMCID: PMC8830334 DOI: 10.7717/peerj.12869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/10/2022] [Indexed: 01/10/2023] Open
Abstract
To study the shape of objects using geometric morphometrics, landmarks are oftentimes collected digitally from a 3D scanned model. The expert may annotate landmarks using software that visualizes the 3D model on a flat screen, and interaction is achieved with a mouse and a keyboard. However, landmark annotation of a 3D model on a 2D display is a tedious process and potentially introduces error due to the perception and interaction limitations of the flat interface. In addition, digital landmark placement can be more time-consuming than direct annotation on the physical object using a tactile digitizer arm. Since virtual reality (VR) is designed to more closely resemble the real world, we present a VR prototype for annotating landmarks on 3D models. We study the impact of VR on annotation performance by comparing our VR prototype to Stratovan Checkpoint, a commonly used commercial desktop software. We use an experimental setup, where four operators placed six landmarks on six grey seal (Halichoerus grypus) skulls in six trials for both systems. This enables us to investigate multiple sources of measurement error. We analyse both for the configuration and for single landmarks. Our analysis shows that annotation in VR is a promising alternative to desktop annotation. We find that annotation precision is comparable between the two systems, with VR being significantly more precise for one of the landmarks. We do not find evidence that annotation in VR is faster than on the desktop, but it is accurate.
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Affiliation(s)
- Dolores Messer
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Michael Atchapero
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Mark B. Jensen
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | | | - Anders Galatius
- Department of Ecoscience, Aarhus University, Roskilde, Denmark
| | - Morten T. Olsen
- Globe Institute, University of Copenhagen, Copenhagen, Denmark
| | - Jeppe R. Frisvad
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Vedrana A. Dahl
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Knut Conradsen
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Anders B. Dahl
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Andreas Bærentzen
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
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18
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Malfroy Camine L, Varlet V, Campana L, Grabherr S, Moghaddam N. The big puzzle: A critical review of virtual re-association methods for fragmented human remains in a DVI context'. Forensic Sci Int 2021; 330:111033. [PMID: 34883302 DOI: 10.1016/j.forsciint.2021.111033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022]
Abstract
During a Disaster Victims Identification (DVI) mission, international protocols rely on interdisciplinary work, especially between specialists from forensic imaging and anthropology. In case of air crashes or explosions, DVI units may face thousands of fragmented human remains (FHRs). The physical re-association of FHRs and the identification process is very complex and challenging, and relies upon expensive and destructive DNA analysis. A virtual re-association (VRA) of these fragments, using Multidetector Computed Tomography (MDCT), could be a helpful tool in forensic anthropology analysis, as it could assist in reducing the number of DNA samples. However, there is no standardized protocol for including such an approach into a DVI procedure. The aim of this study was to summarize and analyze existing techniques through a systematic review and to develop a protocol for virtual re-association of FHRs, adapted to the DVI context. A keyword-based literature search was conducted, focusing on the VRA methods using MDCT imaging and 3D surface scan methodology. Reviews and primary articles, published between 2005 and 2020 in the fields of forensic anthropology, paleoanthropology, archeology, and fracture reduction surgery were sorted out. A total of 45 publications were selected and analyzed based on their content and relevance. The results show that research on the re-association of FHRs increased significantly during the last five years. Seven steps regarding the MDCT-based method for the virtual re-association of FHRs could be identified: acquisition of 3D-images, segmentation of the MDCT-data, post-processing and surface generation, identification of intact and fracture surfaces, identification and registration of matching fragments, and validation of the re-association. The literature is surprisingly sparse regarding the FHRs re-association as a forensic tool, and mainly consists in case reports, whereas validated methods were presented in archeology and surgery publications. However, we were able to adapt the MDCT-based approach for the virtual re-association of the FHRs and propose an innovative protocol for DVI missions. This protocol includes the needed details, from the acquisition of MDCT imaging to the virtual re-association of 3D models and its validation. Each step has to be fully tested, adapted and validated in future studies.
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Affiliation(s)
- Lise Malfroy Camine
- Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
| | - Vincent Varlet
- Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Lorenzo Campana
- Forensic Imaging and Anthropology Unit, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Silke Grabherr
- Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Forensic Imaging and Anthropology Unit, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Geneva University Hospital and University of Geneva, Geneva, Switzerland; Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Negahnaz Moghaddam
- Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Forensic Imaging and Anthropology Unit, University Centre of Legal Medicine Lausanne Geneva, Switzerland; Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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19
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Nold J, Metzger MC, Schwarz S, Wesemann C, Wemken G, Pieralli S, Kernen F, Weingart J, Schirmeister CG, Schumann S, Schlager S, Spies BC. Air seal performance of personalized and statistically shaped 3D-printed face masks compared with market-available surgical and FFP2 masks. Sci Rep 2021; 11:19347. [PMID: 34588584 PMCID: PMC8481495 DOI: 10.1038/s41598-021-98963-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 08/23/2021] [Indexed: 11/09/2022] Open
Abstract
The ongoing COVID-19 pandemic has revealed alarming shortages of personal protective equipment for frontline healthcare professionals and the general public. Therefore, a 3D-printable mask frame was developed, and its air seal performance was evaluated and compared. Personalized masks (PM) based on individual face scans (n = 8) and a statistically shaped mask (SSM) based on a standardized facial soft tissue shape computed from 190 face scans were designed. Subsequently, the masks were additively manufactured, and in a second step, the PM and SSM were compared to surgical masks (SM) and FFP2 masks (FFP2) in terms of air seal performance. 3D-printed face models allowed for air leakage evaluation by measuring the pressure inside the mask in sealed and unsealed conditions during a breathing simulation. The PM demonstrated the lowest leak flow (p < 0.01) of inspired or expired unfiltered air of approximately 10.4 ± 16.4%, whereas the SM showed the highest (p < 0.01) leakage with 84.9 ± 7.7%. The FFP2 and SSM had similar values of 34.9 ± 18.5% leakage (p > 0.68). The developed framework allows for the time- and resource-efficient, on-demand, and in-house production of masks. For the best seal performance, an individually personalized mask design might be recommended.
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Affiliation(s)
- Julian Nold
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Marc C Metzger
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Steffen Schwarz
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Christian Wesemann
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Gregor Wemken
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Stefano Pieralli
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.,Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Florian Kernen
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Julia Weingart
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Carl G Schirmeister
- Institute for Macromolecular Chemistry, Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, 79104, Freiburg, Germany.,Basell Sales & Marketing B.V., LyondellBasell Industries, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Stefan Schumann
- Department of Anesthesiology and Critical Care, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Stefan Schlager
- Department of Biological Anthropology, Medical Center, University of Freiburg, Hebelstraße 29, 79106, Freiburg, Germany
| | - Benedikt C Spies
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.
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20
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Retrodeformation of the Steinheim Cranium: Insights into the Evolution of Neanderthals. Symmetry (Basel) 2021. [DOI: 10.3390/sym13091611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
A number of different approaches are currently available to digitally restore the symmetry of a specimen deformed by taphonomic processes. These tools include mirroring and retrodeformation to approximate the original shape of an object by symmetrisation. Retrodeformation has the potential to return a rather faithful representation of the original shape, but its power is limited by the availability of bilateral landmarks. A recent protocol proposed by Schlager and colleagues (2018) overcomes this issue by using bilateral landmarks and curves as well as semilandmarks. Here we applied this protocol to the Middle Pleistocene human cranium from Steinheim (Germany), the holotype of an abandoned species named Homo steinheimensis. The peculiar morphology of this fossil, associated with the taphonomic deformation of the entire cranium and the lack of a large portion of the right side of the face, has given rise to different hypotheses over its phylogenetic position. The reconstruction presented here sheds new light on the taphonomic origin of some features observed on this crucial specimen and results in a morphology consistent with its attribution to the Neanderthal lineage.
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21
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Godinho RM, Gonçalves C. Testing the reliability of CT scan-based dental wear magnitude scoring. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 176:521-527. [PMID: 34297351 DOI: 10.1002/ajpa.24374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 06/29/2021] [Accepted: 07/07/2021] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Digital models are now frequently used in biological anthropology (bioanthropology) research. Despite several studies validating this type of research, none has examined if the assessment of dental wear magnitude based on Computerized Tomography (CT) scans is reliable. Thus, this study aims to fill this gap and assess if dental wear magnitude scoring based on CT scans provides results consistent with scoring based on direct observation of the physical specimens. MATERIALS AND METHODS Dental wear magnitude from 412 teeth of 35 mandibles originating from the Portuguese Muge and Sado Mesolithic shell-middens was scored. The mandibles were also CT scanned and visualized using 3D Slicer. CT scan-based scoring of dental wear magnitude was then undertaken. Two scoring rounds were undertaken for each observation method (totaling four scoring rounds) and an intra-observer error test was performed. The averaged results of the two observation methods were compared via boxplots with paired cases. RESULTS Intra-observer error was negligible and non-significant. Scoring results are comparable between the two observation methods. Notwithstanding, some differences were found, in which CT scan assessment generally overestimates dental wear when compared to direct observation. DISCUSSION Our results generally validate the use of CT scans in studies of dental wear magnitude. Notwithstanding several caveats relating to CT scanning and visualization limitations should be considered to avoid over or under-estimation of dental wear.
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Affiliation(s)
- Ricardo Miguel Godinho
- Interdisciplinary Center for Archaeology and Evolution of Human Behaviour (ICArHEB), Faculdade das Ciências Humanas e Sociais, Universidade do Algarve, Campus Gambelas, Faro, Portugal
| | - Célia Gonçalves
- Interdisciplinary Center for Archaeology and Evolution of Human Behaviour (ICArHEB), Faculdade das Ciências Humanas e Sociais, Universidade do Algarve, Campus Gambelas, Faro, Portugal
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22
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Tourism in the Time of Coronavirus. Fruition of the “Minor Heritage” through the Development of Bioarchaeological Sites—A Proposal. HERITAGE 2021. [DOI: 10.3390/heritage4020042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The consequences of the coronavirus pandemic are and will continue to be devastating for the tourism sector, especially for the cultural one. It is necessary to reflect on the new strategies to be adopted to deal with the heavy losses that the world of cultural heritage is suffering. The great archaeological attractions will no longer be able to accommodate the prepandemic numbers and therefore we must also think of alternative routes to present the minor heritage of our country. In recent years, our experience has allowed us to realize an open-air museum project in bioarchaeological sites (archaeological cemetery areas characterized by the recovery of human remains) that are part of an archaeological heritage that is little known, but which reserve great dissemination and fruition potential. The design of an archaeological itinerary, even a virtual one, which includes the bioarchaeological sites that we are musealizing, could offer a new visiting experience, especially in this difficult moment for all of us.
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23
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Balolia KL, Massey JS. How does scanner choice and 3D model resolution affect data accuracy? J Anat 2021; 238:679-692. [PMID: 33146411 PMCID: PMC7855060 DOI: 10.1111/joa.13343] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 08/21/2020] [Accepted: 09/28/2020] [Indexed: 11/28/2022] Open
Abstract
Researchers using digital methods often collect data from 3D models at different resolutions, obtained using different scanning techniques. Although previous research has sought to understand whether scanning method and model resolution affect data accuracy, no study has systematically evaluated the sources of error associated with scanning method, data acquisition method and model resolution with the aim of providing practical recommendations about the model resolution required to yield sufficiently accurate data for specimens of given sizes. In this study, using data taken from primate specimens of three broad size categories, we test whether 3D models obtained using five different scanners (Breuckmann SmartSCAN, DAVID/HP 3D Pro S3, NextEngine 2020i, Creaform Go!Scan 20 and microCT/clinicalCT) yield accurate measurements. We assess whether caliper measurements can be used alongside measurements collected from 3D surface models, whether scanning resolution affects measurement accuracy, and how scan resolution, estimated using each scanner's proprietary software, compares to model resolution measured in a standardized way. Each scanner produces 3D models that yield accurate measurements for each size category, however, combining caliper data with those taken from digital models can be problematic. Our results indicate that the accuracy of measurements taken from 3D models depends on both object size and model resolution. Based on our findings, we recommend that small specimens should be scanned at <0.3 mm, medium specimens at 0.3-0.7 mm, and large specimens at 0.3-0.5 mm resolutions if data taken from 3D surface models are to be combined with caliper datasets. We further show, for the first time, that discrepancies in estimated final model resolution are frequently observed across software packages. We therefore recommend that researchers ensure that final model resolutions are adequate based on specimen size and are independently verified using a software package other than the scanner's proprietary software. Finally, we consider the implications of the findings that measurements obtained from surface models are variably consistent with those obtained using calipers.
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Affiliation(s)
- Katharine L. Balolia
- School of Archaeology and AnthropologyThe Australian National UniversityCanberraACTAustralia
| | - Jason S. Massey
- Department of Integrative Biology and PhysiologyUniversity of Minnesota Medical SchoolMinneapolisMNUSA
- Department of Anatomy and Developmental BiologyMonash UniversityMelbourneVicAustralia
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24
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Del Bove A, Profico A, Riga A, Bucchi A, Lorenzo C. A geometric morphometric approach to the study of sexual dimorphism in the modern human frontal bone. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 173:643-654. [PMID: 33025582 DOI: 10.1002/ajpa.24154] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 08/28/2020] [Accepted: 09/13/2020] [Indexed: 01/15/2023]
Abstract
OBJECTIVES We analyzed the main anatomical traits found in the human frontal bone by using a geometric morphometric approach. The objectives of this study are to explore how the frontal bone morphology varies between the sexes and to detect which part of the frontal bone are sexually dimorphic. MATERIALS AND METHODS The sample is composed of 161 skulls of European and North American individuals of known sex. For each cranium, we collected 3D landmarks and semilandmarks on the frontal bone, to examine the entire morphology and separate modules (frontal squama, supraorbital ridges, glabellar region, temporal lines, and mid-sagittal profile). We used Procrustes ANOVAs and LDAs (linear discriminant analyses) to evaluate the relation between frontal bone morphology and sexual dimorphism and to calculate precision and accuracy in the classification of sex. RESULTS All the frontal bone traits are influenced by sexual dimorphism, though each in a different manner. Variation in shape and size differs between the sexes, and this study confirmed that the supraorbital ridges and glabella are the most important regions for sex determination, although there is no covariation between them. The variable size does not contribute significantly to the discrimination between sexes. Thanks to a geometric morphometric analysis, it was found that the size variable is not an important element for the determination of sex in the frontal bone. CONCLUSION The usage of geometric morphometrics in analyzing the frontal bone has led to new knowledge on the morphological variations due to sexual dimorphism. The proposed protocol permits to quantify morphological covariation between modules, to calculate the shape variations related to sexual dimorphism including or omitting the variable size.
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Affiliation(s)
- Antonietta Del Bove
- Àrea de Prehistòria, Facultat de Lletres, Universitat Rovira i Virgili, Tarragona, Spain.,Catalan Institute of Human Paleoecology and Social Evolution IPHES, Tarragona, Spain
| | - Antonio Profico
- PalaeoHub-Department of Archaeology, University of York, York, UK
| | - Alessandro Riga
- Department of Biology, University of Florence, Florence, Italy.,Laboratory of Archaeoanthropology, SABAP-FI, Scandicci, Italy
| | - Ana Bucchi
- Àrea de Prehistòria, Facultat de Lletres, Universitat Rovira i Virgili, Tarragona, Spain.,Catalan Institute of Human Paleoecology and Social Evolution IPHES, Tarragona, Spain
| | - Carlos Lorenzo
- Àrea de Prehistòria, Facultat de Lletres, Universitat Rovira i Virgili, Tarragona, Spain.,Catalan Institute of Human Paleoecology and Social Evolution IPHES, Tarragona, Spain
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25
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Pan L, Dumoncel J, Mazurier A, Zanolli C. Hominin diversity in East Asia during the Middle Pleistocene: A premolar endostructural perspective. J Hum Evol 2020; 148:102888. [PMID: 33039881 DOI: 10.1016/j.jhevol.2020.102888] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 09/10/2020] [Accepted: 09/10/2020] [Indexed: 12/16/2022]
Abstract
Following the recent studies of East Asian mid-Middle to early Late Pleistocene hominin material, a large spectrum of morphological diversity has been recognized and the coexistence of archaic ('Homo erectus-like') and derived ('modern-like') dental morphological patterns has been highlighted. In fact, for most of these Chinese fossils, generally categorized as 'archaic Homo sapiens' or 'post-H. erectus Homo', the taxonomic attribution is a matter of contention. With the help of μCT techniques and a deformation-based 3D geometric morphometric approach, we focused on the morphological variation in the enamel-dentine junction (EDJ) of 18 upper and lower premolars from Chinese Middle Pleistocene hominins. We then compared our results with a number of fossil and modern human groups, including Early Pleistocene H. erectus from Sangiran; late Early Pleistocene hominins from Tighenif, Algeria; classic Neanderthals; and modern humans. Our results highlight an evolutionary/chronological trend of crown base reduction, elevation of EDJ topography, and EDJ surface simplification in the hominin groups studied here. Moreover, this study brings insights to the taxonomy/phylogeny of 6 late Middle Pleistocene specimens whose evolutionary placement has been debated for decades. Among these specimens, Changyang premolars show features that can be aligned with the Asian H. erectus hypodigm, whereas Panxian Dadong and Tongzi premolars are more similar to Late Pleistocene Homo. Compared with early to mid-Middle Pleistocene hominins in East Asia, late Middle Pleistocene hominins evince an enlarged morphological variation. A persistence of archaic morphotypes and possible admixture among populations during the late Middle Pleistocene are discussed.
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Affiliation(s)
- Lei Pan
- Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, CAS, Beijing, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, China
| | - Jean Dumoncel
- Laboratoire AMIS, UMR 5288 CNRS, Université Toulouse III, Paul Sabatier, France
| | - Arnaud Mazurier
- Institut de Chimie des Milieux et Matériaux, UMR 7285 CNRS, Université de Poitiers, 86073, Poitiers, France
| | - Clément Zanolli
- Univ. Bordeaux, CNRS, MCC, PACEA, UMR 5199, F-33600 Pessac, France.
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Transposition of the Suchey–Brooks and spheno-occipital synchondrosis fusion methods onto computed tomographic images: review and future prospects. FORENSIC IMAGING 2020. [DOI: 10.1016/j.fri.2020.200369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Carew RM, Viner MD, Conlogue G, Márquez-Grant N, Beckett S. Accuracy of computed radiography in osteometry: A comparison of digital imaging techniques and the effect of magnification. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.jofri.2019.100348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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The Evolutionary Radiation of Hominids: a Phylogenetic Comparative Study. Sci Rep 2019; 9:15267. [PMID: 31649259 PMCID: PMC6813319 DOI: 10.1038/s41598-019-51685-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 10/07/2019] [Indexed: 11/09/2022] Open
Abstract
Over the last 150 years the diversity and phylogenetic relationships of the hominoids have been one of the main focuses in biological and anthropological research. Despite this, the study of factors involved in their evolutionary radiation and the origin of the hominin clade, a key subject for the further understanding of human evolution, remained mostly unexplored. Here we quantitatively approach these events using phylogenetic comparative methods and craniofacial morphometric data from extant and fossil hominoid species. Specifically, we explore alternative evolutionary models that allow us to gain new insights into this clade diversification process. Our results show a complex and variable scenario involving different evolutionary regimes through the hominid evolutionary radiation –modeled by Ornstein-Uhlenbeck multi-selective regime and Brownian motion multi-rate scenarios–. These different evolutionary regimes might relate to distinct ecological and cultural factors previously suggested to explain hominid evolution at different evolutionary scales along the last 10 million years.
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Mori T, Harvati K. Basicranial ontogeny comparison in
Pan troglodytes
and
Homo sapiens
and its use for developmental stage definition of KNM‐ER 42700. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 170:579-594. [DOI: 10.1002/ajpa.23926] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 07/29/2019] [Accepted: 08/25/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Tommaso Mori
- Palaeoanthropology, Senckenberg Centre for Human Evolution and PalaeoenvironmentEberhard Karls Universität Tübingen Tübingen Germany
| | - Katerina Harvati
- Palaeoanthropology, Senckenberg Centre for Human Evolution and PalaeoenvironmentEberhard Karls Universität Tübingen Tübingen Germany
- DFG Centre for Advanced Studies “Words, Bones, Genes, Tools: Tracking Linguistic, Cultural and Biological Trajectories of the Human Past”Eberhard Karls Universität Tübingen Tübingen Germany
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30
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Brough A, Rutty G, Villa C, Colman K, Dedouit F, Decker SJ. The benefits of medical imaging and 3D modelling to the field of forensic anthropology positional statement of the members of the forensic anthropology working group of the International Society of Forensic Radiology and Imaging. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.jofri.2019.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Galeazzi F. 3-D Virtual Replicas and Simulations of the Past: “Real” or “Fake” Representations? CURRENT ANTHROPOLOGY 2018. [DOI: 10.1086/697489] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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32
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Chang V. Computational Intelligence for Medical Imaging Simulations. J Med Syst 2017; 42:10. [PMID: 29177790 DOI: 10.1007/s10916-017-0861-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/10/2017] [Indexed: 12/31/2022]
Abstract
This paper describes how to simulate medical imaging by computational intelligence to explore areas that cannot be easily achieved by traditional ways, including genes and proteins simulations related to cancer development and immunity. This paper has presented simulations and virtual inspections of BIRC3, BIRC6, CCL4, KLKB1 and CYP2A6 with their outputs and explanations, as well as brain segment intensity due to dancing. Our proposed MapReduce framework with the fusion algorithm can simulate medical imaging. The concept is very similar to the digital surface theories to simulate how biological units can get together to form bigger units, until the formation of the entire unit of biological subject. The M-Fusion and M-Update function by the fusion algorithm can achieve a good performance evaluation which can process and visualize up to 40 GB of data within 600 s. We conclude that computational intelligence can provide effective and efficient healthcare research offered by simulations and visualization.
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Affiliation(s)
- Victor Chang
- International Business School Suzhou, Xi'an Jiaotong-Liverpool University, Suzhou, China.
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33
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Schlager S, Rüdell A. Sexual Dimorphism and Population Affinity in the Human Zygomatic Structure-Comparing Surface to Outline Data. Anat Rec (Hoboken) 2017; 300:226-237. [PMID: 28000405 DOI: 10.1002/ar.23450] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/04/2016] [Accepted: 06/06/2016] [Indexed: 01/19/2023]
Abstract
The human zygomatic structure, consisting of the zygomatic bone and the zygomatic process of the temporal bone, is an essential part of the masticatory apparatus and has been shown to reflect population history and sexual dimorphism to varying degrees. In this study, we analyzed the predictive value of the outlines vs. the complete surface shape of the zygomatic bone in a sample of 98 Chinese (50 ♀, 48 ♂) and 96 Germans (49 ♀, 47 ♂). We first applied a surface registration process based on statistical shape modeling. A dense set of 1,480 pseudo-landmarks was then sampled automatically from the surface of the pooled mean shape and three curves were digitized manually along the outlines of the zygomatic bone. Both sets of pseudo-landmarks were automatically transferred to all specimens. Analysis of sex and population affinity showed both factors to be independently significant, but the interaction between them was not. Population affinity could be predicted quite accurately with correct classification of 97.9% using the surface data and 93.3% with the curve data. Sexual dimorphism was less distinct with 89.2% correct sex determination when using surface information compared with 77.8% when using the curve data. Population-related shape differences were captured primarily in the outlines, while sexual dimorphism is distributed more uniformly throughout the entire surface of the zygomatic structure. Anat Rec, 300:226-237, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Stefan Schlager
- Albert-Ludwigs-Universitat Freiburg Medizinische Fakultat, Biological Anthropology, Hebelstr. 29, Freiburg, Baden-Württemberg, 79104, Germany
| | - Alexandra Rüdell
- Albert-Ludwigs-Universitat Freiburg Medizinische Fakultat, Biological Anthropology, Hebelstr. 29, Freiburg, Baden-Württemberg, 79104, Germany
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Uldin T. Virtual anthropology - a brief review of the literature and history of computed tomography. Forensic Sci Res 2017; 2:165-173. [PMID: 30483637 PMCID: PMC6197098 DOI: 10.1080/20961790.2017.1369621] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 08/16/2017] [Indexed: 11/21/2022] Open
Abstract
Computed tomography (CT) has influenced numerous fields since its inception in the 1970s. The field of palaeoanthropology significantly benefited from this efficient and non-invasive medium in terms of the conservation, reconstruction and analysis of fossil human remains. Over the past decade, there has been a steady increase in the number of forensic anthropological studies incorporating virtual osteological analyses. Because of the increasing importance of these modern cross-sectional imaging techniques and the requirement for standardized parameters in forensic science, we deemed it important to outline the history and development of CT applications in these related academic areas. The present paper outlines the history of “virtual anthropology” and osteological multi-detector CT in the context of palaeoanthropology and forensic anthropology.
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Affiliation(s)
- Tanya Uldin
- Department of Medicine and Community Health, University Center of Legal Medicine Lausanne-Geneva, University Hospital of Lausanne, Lausanne, Switzerland
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35
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Reynolds MS, MacGregor DM, Barry MD, Lottering N, Schmutz B, Wilson LJ, Meredith M, Gregory LS. Standardized anthropological measurement of postcranial bones using three-dimensional models in CAD software. Forensic Sci Int 2017; 278:381-387. [DOI: 10.1016/j.forsciint.2017.07.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 05/19/2017] [Accepted: 07/17/2017] [Indexed: 11/30/2022]
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36
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Wilson L, Humphrey L. Voyaging into the third dimension: A perspective on virtual methods and their application to studies of juvenile sex estimation and the ontogeny of sexual dimorphism. Forensic Sci Int 2017; 278:32-46. [DOI: 10.1016/j.forsciint.2017.06.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/16/2017] [Accepted: 06/16/2017] [Indexed: 02/06/2023]
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37
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Edwards J, Rogers T. The Accuracy and Applicability of 3D Modeling and Printing Blunt Force Cranial Injuries. J Forensic Sci 2017; 63:683-691. [DOI: 10.1111/1556-4029.13627] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/24/2017] [Accepted: 08/01/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Julie Edwards
- Department of Anthropology; University of Toronto Mississauga; 3359 Mississauga Road Mississauga ON L5L 1C6 Canada
| | - Tracy Rogers
- Department of Anthropology; University of Toronto Mississauga; 3359 Mississauga Road Mississauga ON L5L 1C6 Canada
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38
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The costal remains of the El Sidrón Neanderthal site (Asturias, northern Spain) and their importance for understanding Neanderthal thorax morphology. J Hum Evol 2017; 111:85-101. [PMID: 28874276 DOI: 10.1016/j.jhevol.2017.06.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 06/05/2017] [Accepted: 06/09/2017] [Indexed: 11/21/2022]
Abstract
The study of the Neanderthal thorax has attracted the attention of the scientific community for more than a century. It is agreed that Neanderthals have a more capacious thorax than modern humans, but whether this was caused by a medio-lateral or an antero-posterior expansion of the thorax is still debated, and is key to understanding breathing biomechanics and body shape in Neanderthals. The fragile nature of ribs, the metameric structure of the thorax and difficulties in quantifying thorax morphology all contribute to uncertainty regarding precise aspects of Neanderthal thoracic shape. The El Sidrón site has yielded costal remains from the upper to the lower thorax, as well as several proximal rib ends (frequently missing in the Neanderthal record), which help to shed light on Neanderthal thorax shape. We compared the El Sidrón costal elements with ribs from recent modern humans as well as with fossil modern humans and other Neanderthals through traditional morphometric methods and 3D geometric morphometrics, combined with missing data estimation and virtual reconstruction (at the 1st, 5th and 11th costal levels). Our results show that Neanderthals have larger rib heads and articular tubercles than their modern human counterparts. Neanderthal 1st ribs are smaller than in modern humans, whereas 5th and 11th ribs are considerably larger. When we articulated mean ribs (size and shape) with their corresponding vertebral elements, we observed that compared to modern humans the Neanderthal thorax is medio-laterally expanded at every level, especially at T5 and T11. Therefore, in the light of evidence from the El Sidrón costal remains, we hypothesize that the volumetric expansion of the Neanderthal thorax proposed by previous authors would mainly be produced by a medio-lateral expansion of the thorax.
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39
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Fahrni S, Campana L, Dominguez A, Uldin T, Dedouit F, Delémont O, Grabherr S. CT-scan vs. 3D surface scanning of a skull: first considerations regarding reproducibility issues. Forensic Sci Res 2017; 2:93-99. [PMID: 30483625 PMCID: PMC6197135 DOI: 10.1080/20961790.2017.1334353] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/22/2017] [Indexed: 11/03/2022] Open
Abstract
Three-dimensional surface scanning (3DSS) and multi-detector computed tomography (MDCT) are two techniques that are used in legal medicine for digitalizing objects, a body or body parts such as bones. While these techniques are more and more commonly employed, surprisingly little information is known about the quality rendering of digitalized three-dimensional (3D) models provided by each of them. This paper presents findings related to the measurement precision of 3D models obtained through observation of a study case, where a fractured skull reconstructed by an anthropologist was digitalized using both post-mortem imaging methods. Computed tomography (CT) scans were performed using an 8-row MDCT unit with two different slice thicknesses. The variability of 3D CT models superimposition allowed to assess the reproducibility and robustness of this digitalization technique. Furthermore, two 3D surface scans were done using a professional high resolution 3D digitizer. The comparison of 3D CT-scans with 3D surface scans by superimposition demonstrated several regions with significant differences in topology (average difference between +1.45 and -1.22 mm). When comparing the reproducibility between these two digitalizing techniques, it appeared that MDCT 3D models led in general to greater variability for measurement precision between scanned surfaces. Also, the reproducibility was better achieved with the 3D surface digitizer, showing 3D models with fewer and less pronounced differences (from +0.32 to -0.31 mm). These experiments suggest that MDCT provides less reproducible body models than 3D surface scanning. But further studies must be undertaken in order to corroborate this first impression, and possibly explain the reason for these findings.
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Affiliation(s)
- Stella Fahrni
- School of Criminal Justice, University of Lausanne, Lausanne-Dorigny, Switzerland.,Department of Forensic Imaging, University Centre for Legal Medicine Lausanne-Geneva, Lausanne, Switzerland
| | - Lorenzo Campana
- Department of Forensic Imaging, University Centre for Legal Medicine Lausanne-Geneva, Lausanne, Switzerland
| | - Alejandro Dominguez
- Department of Technological Radiology, Health School of Sciences Vaud - HESAV, Lausanne, Switzerland
| | - Tanya Uldin
- Department of Forensic Imaging, University Centre for Legal Medicine Lausanne-Geneva, Lausanne, Switzerland
| | - Fabrice Dedouit
- Department of Forensic Imaging, University Centre for Legal Medicine Lausanne-Geneva, Lausanne, Switzerland
| | - Olivier Delémont
- School of Criminal Justice, University of Lausanne, Lausanne-Dorigny, Switzerland
| | - Silke Grabherr
- Department of Forensic Imaging, University Centre for Legal Medicine Lausanne-Geneva, Lausanne, Switzerland
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40
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Weber GW, Krenn VA. Zygomatic Root Position in Recent and Fossil Hominids. Anat Rec (Hoboken) 2016; 300:160-170. [DOI: 10.1002/ar.23490] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/01/2016] [Accepted: 06/14/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Gerhard W. Weber
- Department of Anthropology; University of Vienna; Austria
- University of Vienna, Core Facility for Micro-Computed Tomography; Austria
| | - Viktoria A. Krenn
- Department of Anthropology; University of Vienna; Austria
- University of Vienna, Core Facility for Micro-Computed Tomography; Austria
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41
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Stem members of Platyrrhini are distinct from catarrhines in at least one derived cranial feature. J Hum Evol 2016; 100:16-24. [DOI: 10.1016/j.jhevol.2016.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 08/01/2016] [Accepted: 08/02/2016] [Indexed: 11/17/2022]
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42
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Villa C, Buckberry J, Lynnerup N. Evaluating osteological ageing from digital data. J Anat 2016; 235:386-395. [PMID: 27620700 DOI: 10.1111/joa.12544] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2016] [Indexed: 11/28/2022] Open
Abstract
Age 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 computed tomography 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. First, 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 scans has been used to assess qualitatively or quantitatively 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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Affiliation(s)
- Chiara Villa
- Laboratory of Biological Anthropology, Department of Forensic Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Jo Buckberry
- Biological Anthropology Research Centre, Archaeological Sciences, University of Bradford, Bradford, UK
| | - Niels Lynnerup
- Laboratory of Biological Anthropology, Department of Forensic Medicine, University of Copenhagen, Copenhagen, Denmark
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43
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Gonzalez PN, Barbeito-Andrés J, D'Addona LA, Bernal V, Perez SI. Technical note: Performance of semi and fully automated approaches for registration of 3D surface coordinates in geometric morphometric studies. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2016; 160:169-78. [PMID: 26748891 DOI: 10.1002/ajpa.22934] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/13/2015] [Accepted: 12/14/2015] [Indexed: 01/01/2023]
Abstract
OBJECTIVES One of the biggest challenges in the study of complex morphologies is to adequately describe shape variation. Here, we assess how the random sampling of surface points automatically obtained performs, when compared with observer-guided sampling procedures, and also evaluate the effect of sliding surface points by bending energy and minimum Procrustes distance. MATERIAL AND METHODS Three datasets comprising structures with disparate levels of complexity and intrasample variation are as follows: mouse molars, mouse brains, and primate endocasts. Different configurations of 3D coordinates on curves and surfaces were digitized from MRI images and CT scans using semi and fully automated procedures. Shape variables were obtained by Generalized Procrustes Superpositions before and after sliding the pseudolandmarks. Multivariate analyses were used to summarize and compare shape variation. RESULTS For the primate endocast, the semiautomated and automated strategies yield similar ordinations of specimens. Conversely, the semiautomated strategy better discriminates molar shapes between mouse groups. Shape differences among specimens are not adequately represented by the PCs calculated with surface pseudolandmarks. This is improved when the points are converted into semilandmarks by a sliding criterion. DISCUSSION Surface semilandmarks automatically obtained from 3D models are promising although they should be used with some caution in complex structures. This approach can be taken as complementary of semiautomated procedures which perform better for assessing shape variation in localized traits previously selected while automated procedures are suitable in studies aimed at comparing overall variation in shape and when there is no previous information about highly variable anatomical regions.
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Affiliation(s)
- Paula N Gonzalez
- Instituto De Genética Veterinaria "Ing. Fernando N. Dulout", CONICET-Facultad De Ciencias Veterinarias, Universidad Nacional De La Plata, 1900, La Plata, Argentina.,División Antropología, Facultad De Ciencias Naturales Y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina
| | - Jimena Barbeito-Andrés
- Instituto De Genética Veterinaria "Ing. Fernando N. Dulout", CONICET-Facultad De Ciencias Veterinarias, Universidad Nacional De La Plata, 1900, La Plata, Argentina
| | - Lucas A D'Addona
- División Antropología, Facultad De Ciencias Naturales Y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina
| | - Valeria Bernal
- División Antropología, Facultad De Ciencias Naturales Y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina.,CONICET, Universidad Nacional De La Plata, 1900, La Plata, Argentina
| | - S Ivan Perez
- División Antropología, Facultad De Ciencias Naturales Y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina.,CONICET, Universidad Nacional De La Plata, 1900, La Plata, Argentina
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44
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Algee-Hewitt BFB, Wheat AD. The reality of virtual anthropology: Comparing digitizer and laser scan data collection methods for the quantitative assessment of the cranium. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 160:148-55. [PMID: 26714825 DOI: 10.1002/ajpa.22932] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 11/06/2015] [Accepted: 12/12/2015] [Indexed: 11/10/2022]
Abstract
OBJECTIVES The use of geometric morphometry to study cranial variation has steadily grown in appeal over the past decade in biological anthropology. Publication trends suggest that the most popular methods for three-dimensional data acquisition involve landmark-based coordinate data collection using a digitizer. Newer laser scan approaches are seeing increasing use, owing to the benefits that densely sampled data offer. While both of these methods have their utility, research that investigates their compatibility is lacking. The purpose of this project is to compare, quantitatively, craniometrics collected with a digitizer against data extracted from laser scans using the same individuals and laboratory conditions. MATERIALS AND METHODS Three-dimensional (x,y,z) coordinates and traditional inter-landmark distances (ILDs) were obtained with a Microscribe digitizer and 360° color models produced from NextEngine laser scans for 38 adult crania representing five cemeteries from the ADBOU skeletal collection in Denmark. Variance-based tests were performed to evaluate the disagreement between data collected with a digitizer and from laser scan models. Consideration was given to differences among landmarks by type, between ILDs calculated from landmark coordinates, and in morphology for the cemetery populations. Further, the reliability of laser scan data collection was assessed by intra-observer error tests. RESULTS Researchers should be aware of the potential error associated with the use of Types II and III landmarks and the limitations on reliability imposed by object-to-scanner placement. DISCUSSION This project reveals how laser scans can provide a valuable digital archive of cranial material that can be reasonably exploited for the "virtual" collection of coordinates and the calculation of ILDs.
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Affiliation(s)
- Bridget F B Algee-Hewitt
- Department of Biology, Stanford Center for Computational, Evolutionary and Human Genomics, Stanford University, Stanford, CA, 94305.,Department of Anthropology, Florida State University, Tallahassee, FL, 32306.,Department of Scientific Computing, Florida State University, Tallahassee, FL, 32306.,Department of Anthropology, University of Tennessee, Knoxville, TN, 37996
| | - Amber D Wheat
- Department of Anthropology, University of Tennessee, Knoxville, TN, 37996
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45
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Wilson LA, Humphrey LT. A Virtual geometric morphometric approach to the quantification of long bone bilateral asymmetry and cross-sectional shape. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015. [DOI: 10.1002/ajpa.22809] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Laura A.B. Wilson
- School of Biological Earth and Environmental Sciences; University of New South Wales; Kensington Sydney NS 2052 Australia
| | - Louise T. Humphrey
- Department of Earth Sciences; The Natural History Museum; London SW7 5BD UK
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The Parametric Model of the Human Mandible Coronoid Process Created by Method of Anatomical Features. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2015; 2015:574132. [PMID: 26064183 PMCID: PMC4438270 DOI: 10.1155/2015/574132] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 04/15/2015] [Indexed: 12/04/2022]
Abstract
Geometrically accurate and anatomically correct 3D models of the human bones are of great importance for medical research and practice in orthopedics and surgery. These geometrical models can be created by the use of techniques which can be based on input geometrical data acquired from volumetric methods of scanning (e.g., Computed Tomography (CT)) or on the 2D images (e.g., X-ray). Geometrical models of human bones created in such way can be applied for education of medical practitioners, preoperative planning, etc. In cases when geometrical data about the human bone is incomplete (e.g., fractures), it may be necessary to create its complete geometrical model. The possible solution for this problem is the application of parametric models. The geometry of these models can be changed and adapted to the specific patient based on the values of parameters acquired from medical images (e.g., X-ray). In this paper, Method of Anatomical Features (MAF) which enables creation of geometrically precise and anatomically accurate geometrical models of the human bones is implemented for the creation of the parametric model of the Human Mandible Coronoid Process (HMCP). The obtained results about geometrical accuracy of the model are quite satisfactory, as it is stated by the medical practitioners and confirmed in the literature.
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Stephen AJ, Wegscheider PK, Nelson AJ, Dickey JP. Quantifying the precision and accuracy of the MicroScribe G2X three-dimensional digitizer. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.daach.2015.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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