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Christopher Sevara, Geert Verhoeven, Michael Doneus, Erich Draganits
Historic aerial images are invaluable sources of aid to archaeological research. Often collected with large-format photogrammetric quality cameras, these images are potential archives of multidimensional data that can be used to recover information about historic landscapes that have been lost to modern development. However, a lack of camera information for many historic images coupled with physical degradation of their media has often made it difficult to compute geometrically rigorous 3D content from such imagery...
2018: Journal of archaeological method and theory
Erin C Peterson, Kamlesh B Patel, Gary B Skolnick, Kristin D Pfeifauf, Katelyn N Davidson, Matthew D Smyth, Sybill D Naidoo
OBJECTIVE Deformational plagiocephaly and/or brachycephaly (DPB) is a cranial flattening frequently treated in pediatric craniofacial centers. The standard of care for DPB involves patient positioning or helmet therapy. Orthotic therapy successfully reduces cranial asymmetry, but there is concern over whether the orthotics have the potential to restrict cranial growth. Previous research addressing helmet safety was limited by lack of volume measurements and serial data. The purpose of this study was to directly compare head growth data in patients with DPB between those who underwent helmet therapy and those who received repositioning therapy...
May 11, 2018: Journal of Neurosurgery. Pediatrics
Enrique Soriano Heras, Fernando Blaya Haro, José M de Agustín Del Burgo, Manuel Islán Marcos, Roberto D'Amato
The main purpose of this paper is to present a system to detect extrusion failures in fused deposition modelling (FDM) 3D printers by sensing that the filament is moving forward properly. After several years using these kind of machines, authors detected that there is not any system to detect the main problem in FDM machines. Authors thought in different sensors and used the weighted objectives method, one of the most common evaluation methods, for comparing design concepts based on an overall value per design concept...
May 9, 2018: Sensors
Olivia E Linden, Vanessa M Baratta, Jose A Gonzalez, Margaret E Byrne, Petra M Klinge, Stephen R Sullivan, Helena O Taylor
OBJECTIVE: To evaluate 3-dimensional (3-D) photogrammetry as a tool for assessing the postoperative head shape of patients who had undergone cranial vault remodeling for metopic synostosis. DESIGN: We prospectively analyzed images of patients with metopic craniosynostosis who had undergone anterior cranial vault remodeling and age-matched controls. To ensure standardized facial orientation, each 3-D image was positioned to "best fit" the preoperative face by aligning 6 soft tissue landmarks...
January 1, 2018: Cleft Palate-craniofacial Journal
P F Meyer, A C G Furtado, S F T Morais, L G de Araujo Neto, R M Valentim da Silva, R Marcel, M L Medeiros, C A Maciel de Queiroz
  BACKGROUND: The cryolipolysis is on the spotlight as a non-invasive method which reduces fat layer thickness with no damage to surrounding tissues. OBJECTIVE: This study aims to verify the effectiveness of cryolipolysis in the reduction of localized adiposity in women. MATERIALS AND METHODS: This is an experimental study, without a control group, with pre- and post- treatment evaluation through a single application on the lower abdominal area. SETTING: Research conducted in the period from July to December 2015 at the University Potiguar...
September 2017: Cryo Letters
Ramona Michienzi, Seraina Meier, Lars C Ebert, Rosa Maria Martinez, Till Sieberth
As forensic science technologies progress, digital photography has become outdated for certain documentations that require exact measurements. Recording three-dimensional objects on a two-dimensional photograph leads to a potential loss of relevant information. Photogrammetry has been utilized to record persons, objects or crime scenes and prevents this loss. Photogrammetry enables accurate documentation and visualization of events or matching of injuries and injury-causing instruments. To reduce inaccuracies during photogrammetric recording, a multi camera device, Botscan by Botspot, can be used to record living persons in three-dimensional space (3D)...
April 14, 2018: Forensic Science International
Anand Kumar Mishra, Andrea Degl'Innocenti, Barbara Mazzolai
OBJECTIVE: Within the field of biorobotics, an emerging branch is plant-inspired robotics. Some effort exists in particular towards the production of digging robots that mimic roots; for these, a deeper comprehension of the role of root tip geometry in excavation would be highly desirable. Here we demonstrate a photogrammetry-based pipeline for the production of computer and manufactured replicas of moth orchid root apexes. RESULTS: Our methods yields faithful root reproductions...
April 25, 2018: BMC Research Notes
Danica Schaffer-Smith, Jennifer J Swenson, Matthew E Reiter, Jennifer E Isola
Over 50% of Western Hemisphere shorebird species are in decline due to ongoing habitat loss and degradation. In some regions of high wetland loss, shorebirds are heavily reliant on a core network of remaining human-managed wetlands during migration journeys in the spring and fall. While most refuges have been designed and managed to match the habitat needs of waterfowl, shorebirds typically require much shallower water (<10cm deep). Traditional static habitat modeling approaches at relatively coarse spatial and temporal resolution are insufficient to capture dynamic changes within this narrow water depth range...
April 25, 2018: Ecological Applications: a Publication of the Ecological Society of America
Klaus W W Dörhage, Jörg Wiltfang, Vera von Grabe, Annalena Sonntag, Stephan T Becker, Benedicta E Beck-Broichsitter
PURPOSE: The positional non-synostotic plagiocephaly represents a cranial asymmetry affecting all 3 dimensions. The aim of this study was to evaluate volumetric indices to assess the efficiency in improving non-synostotic cranial asymmetries in treatment with head orthoses. MATERIAL AND METHODS: A total of 96 infants were included in this observational retrospective study. The cohort was further divided into subgroups according to age of helmet supply (younger/older than 7...
March 29, 2018: Journal of Cranio-maxillo-facial Surgery
Christen J Boyer, Jennifer E Woerner, Christopher Galea, Corbin A Gatlin, Ghali E Ghali, David K Mills, Jeffery A Weisman, Jonathan S Alexander
PURPOSE: After cleft lip and palate surgical procedures, patients often need nostril supports to help the reconstructed nostrils retain their shape during healing. Many postoperative nasal stents use a one-size-fits-all approach, in which a standard rubber tube retainer is trimmed and used to support the healing nares. The purpose of this study was to examine photogrammetry and 3-dimensional (3D) printing as a fabrication tool for postoperative patient-specific nasal supports that can be loaded with bioactive agents for localized delivery...
March 28, 2018: Journal of Oral and Maxillofacial Surgery
Alessandro De Benedictis, Erica Nocerino, Fabio Menna, Fabio Remondino, Mattia Barbareschi, Umberto Rozzanigo, Francesco Corsini, Emanuele Olivetti, Carlo Efisio Marras, Franco Chioffi, Paolo Avesani, Silvio Sarubbo
BACKGROUND: Anatomical awareness of brain's structural connectivity is mandatory for neurosurgeons, to select the most effective approaches for brain resections. Although standard micro-dissection is a validated technique to investigate the different white matter (WM) pathways and to verify results coming from tractography, the possibility of an interactive exploration of the specimens and of a reliable acquisition of quantitative information has not been described so far. Photogrammetry is a well-established technique allowing an accurate metrology on highly defined 3D-models...
April 13, 2018: World Neurosurgery
Hanyao Huang, Yeping Li, Xiangyou Luo, Xu Cheng, Bing Shi, Jingtao Li
The relapse of nasal deformity is a challenge for modern correction of cleft lip. A comprehensive understanding in the biomechanical perspective of both the formation and correction of the cleft lip nasal deformity would lead to improved stability of the corrective outcome. In this study, a finite element model of secondary cleft lip nasal deformity was constructed, on which two critical corrective maneuvers were mimicked in the form of force-loading. The intercrural suture was simulated by a force loaded at the intermediate crus of the alar cartilage directing anteriorly and medially, and the suture suspending the alar cartilage to the upper lateral cartilage was simulated by a force loaded at the lateral crus directing superiorly and medially...
2018: PloS One
Dionisio Andújar, Mikel Calle, César Fernández-Quintanilla, Ángela Ribeiro, José Dorado
Sensing advances in plant phenotyping are of vital importance in basic and applied plant research. Plant phenotyping enables the modeling of complex shapes, which is useful, for example, in decision-making for agronomic management. In this sense, 3D processing algorithms for plant modeling is expanding rapidly with the emergence of new sensors and techniques designed to morphologically characterize. However, there are still some technical aspects to be improved, such as an accurate reconstruction of end-details...
April 3, 2018: Sensors
Katarina Düppe, Magnus Becker, Björn Schönmeyr
In this study, 14 standard facial distances on 10 adult volunteers were measured directly with a caliper and indirectly on two-dimensional images using the 3dMDtrio system. Two raters performed the measurements with at least 1 week between rating sessions. The intra- and inter-rater reliabilities and agreement of the measurements were calculated using intra-class correlation coefficient (ICC), mean absolute difference (MAD), and Bland-Altman plots with limits of agreement (LOA). The 2 raters had an average discrepancy (MAD) of 1...
March 30, 2018: Journal of Craniofacial Surgery
Christopher Dean, Jamie B Kirkpatrick, Jon Osborn, Richard B Doyle, Nicholas B Fitzgerald, Stephen H Roxburgh
There is high uncertainty in the contribution of land-use change to anthropogenic climate change, especially pertaining to below-ground carbon loss resulting from conversion of primary-to-secondary forest. Soil organic carbon (SOC) and coarse roots are concentrated close to tree trunks, a region usually unmeasured during soil carbon sampling. Soil carbon estimates and their variation with land-use change have not been correspondingly adjusted. Our aim was to deduce allometric equations that will allow improvement of SOC estimates and tree trunk carbon estimates, for primary forest stands that include large trees in rugged terrain...
March 2018: AoB Plants
Manuel Bratos, Jumping M Bergin, Jeffrey E Rubenstein, John A Sorensen
STATEMENT OF PROBLEM: Conventional impression techniques to obtain a definitive cast for a complete-arch implant-supported prosthesis are technique-sensitive and time-consuming. Direct optical recording with a camera could offer an alternative to conventional impression making. PURPOSE: The purpose of this in vitro study was to test a novel intraoral image capture protocol to obtain 3-dimensional (3D) implant spatial measurement data under simulated oral conditions of vertical opening and lip retraction...
March 17, 2018: Journal of Prosthetic Dentistry
Maria Costanza Meazzini, Carlo Chiavenna, Luca Autelitano, Giovanna Garattini, Roberto Brusati
OBJECTIVE: Nasal stigma in patients with bilateral cleft lip and palate (BCLP) are a short columella and a flattened nasal tip. DESIGN: The aim of this study was to evaluate the aesthetics of adolescents with BCLP, operated with a modified Cutting primary columella lengthening technique, associated to a modified Grayson orthopedic nasoalveolar molding (NAM). SETTING AND PATIENTS: 72 BCLP patients were operated with this approach. Standardized photographic records were taken every 2 years...
April 2018: Cleft Palate-craniofacial Journal
Thomas Waltemate, Dominik Gall, Daniel Roth, Mario Botsch, Marc Erich Latoschik
This article reports the impact of the degree of personalization and individualization of users' avatars as well as the impact of the degree of immersion on typical psychophysical factors in embodied Virtual Environments. We investigated if and how virtual body ownership (including agency), presence, and emotional response are influenced depending on the specific look of users' avatars, which varied between (1) a generic hand-modeled version, (2) a generic scanned version, and (3) an individualized scanned version...
April 2018: IEEE Transactions on Visualization and Computer Graphics
Kihwan Han, Sangho Oh, Jaehoon Choi, Sang Woo Park
BACKGROUND: Alar transfixion sutures are commonly used for vestibular web correction. The purpose of this study was to evaluate the long-term results of the use of alar transfixion sutures in patients with a unilateral cleft lip nasal deformity using photogrammetric analysis. METHODS: The study included 42 patients who were divided into child and adult groups. A total of 4 measurement items were evaluated from a basal view by photogrammetry using standardized clinical photographic techniques preoperatively, immediately postoperatively, 3 months postoperatively, and 6 months postoperatively...
May 2018: Annals of Plastic Surgery
Simon Sw Li, Daniel Hk Chow
BACKGROUND: Usual guidelines recommend symmetric load carriage over asymmetric load carriage. Whether this recommendation is valid for subjects with asymmetric body alignment, such as those with scoliosis, remains unclear. Scoliosis is both a subject-dependent and time-variant condition. Interventions are generally employed to prevent the abnormal spinal curvature from progressing. OBJECTIVES: To investigate the effects of an asymmetric load carriage on lateral spinal deformity in participant with scoliosis...
February 1, 2018: Prosthetics and Orthotics International
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