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https://www.readbyqxmd.com/read/28423221/facial-asymmetry-in-head-and-neck-rhabdomyosarcoma-survivors
#1
Reineke A Schoot, Marinka L F Hol, Johannes H M Merks, Michael Suttie, Olga Slater, Marinde van Lennep, Saskia M J Hopman, David Dunaway, Jonathan Syme-Grant, Ludi E Smeele, Koos H Zwinderman, Huib N Caron, Peter Hammond
INTRODUCTION: Radiotherapy is essential for achieving and maintaining local control in head and neck rhabdomyosarcoma (HNRMS) patients. However, radiotherapy may cause outgrowth disturbances of facial bone and soft tissue, resulting in facial asymmetry. The aim of this study was to develop a method to visualize and measure facial asymmetry in HNRMS survivors using three-dimensional (3D) imaging techniques. METHODS: Facial deformity was evaluated in a multidisciplinary clinical assessment of 75 HNRMS survivors, treated with external beam radiotherapy (EBRT, n = 26) or Ablative surgery, MOulage brachytherapy, and REconstruction (AMORE, n = 49)...
April 19, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28399086/-the-currently-available-possibilities-for-the-application-of-photogrammetry-in-the-forensic-medical-expertise-of-the-blood-stains-at-the-scene-of-the-crime
#2
V A Fetisov, I Yu Makarov, A A Gusarov, A S Lorents, S A Smirenin, V B Stragis
The study of blood stains retained at the scene of the crime is of crucial importance for the preliminary inquiry. The present article is focused on the analysis of the possibilities and prospects for the use of photogrammetry (PM) as exemplified by the foreign expert practice of the blood stains examination at the site of the event. It is shown that the results of the application of digital photogrammetry in addition to the traditional methods of morphological investigations enables the forensic medical experts to reconstruct a number of unique features and circumstances that accompanied the commission of a crime at the site of the event...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28398230/integrating-spherical-panoramas-and-maps-for-visualization-of-cultural-heritage-objects-using-virtual-reality-technology
#3
Mila Koeva, Mila Luleva, Plamen Maldjanski
Development and virtual representation of 3D models of Cultural Heritage (CH) objects has triggered great interest over the past decade. The main reason for this is the rapid development in the fields of photogrammetry and remote sensing, laser scanning, and computer vision. The advantages of using 3D models for restoration, preservation, and documentation of valuable historical and architectural objects have been numerously demonstrated by scientists in the field. Moreover, 3D model visualization in virtual reality has been recognized as an efficient, fast, and easy way of representing a variety of objects worldwide for present-day users, who have stringent requirements and high expectations...
April 11, 2017: Sensors
https://www.readbyqxmd.com/read/28363664/evaluating-accuracy-and-reliability-of-active-stereophotogrammetry-using-mavis-iii-wound-camera-for-three-dimensional-assessment-of-hypertrophic-scars
#4
Samuel Su, Sarthak Sinha, Vincent Gabriel
OBJECTIVE: Current strategies for estimating positive scar volume following burns is limited to employing subjective scar scales. This study assesses the accuracy and reliability of Measurement of Area and Volume Instrument System (MAVIS) III, a portable 3D active stereophotogrammetric imaging system, for non-invasive assessment of hypertrophic scar volume and elucidates factors that leads to inaccurate volume determination. METHODS: To determine accuracy, hypertrophic scars arising in various skin and wound types were modeled using moldable putty substance...
March 28, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28341584/development-of-videogrammetry-as-a-tool-for-gas-particle-fluidization-research
#5
S Anweiler
Many industries use fluidization of solid particles for energy efficiency or environmental friendly process development, and this paper introduces research techniques developed for investigating gas-particle systems At present there is plenty of room for refining gas-particle fluidization process. With the rapidly rising application of mathematical modelling, real time visualization of processes will be widely used for validation of those models in the near future. In presented research, photogrammetry, as a part of close range vision metrology, has been expanded to allow dynamic space and time analysis of the phase concentration distribution inside fluidization devices...
March 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28340394/assessment-of-engineered-surfaces-roughness-by-high-resolution-3d-sem-photogrammetry
#6
L C Gontard, J D López-Castro, L González-Rovira, J M Vázquez-Martínez, F M Varela-Feria, M Marcos, J J Calvino
We describe a methodology to obtain three-dimensional models of engineered surfaces using scanning electron microscopy and multi-view photogrammetry (3DSEM). For the reconstruction of the 3D models of the surfaces we used freeware available in the cloud. The method was applied to study the surface roughness of metallic samples patterned with parallel grooves by means of laser. The results are compared with measurements obtained using stylus profilometry (PR) and SEM stereo-photogrammetry (SP). The application of 3DSEM is more time demanding than PR or SP, but it provides a more accurate representation of the surfaces...
March 7, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28339510/3d-dentofacial-photogrammetry-reference-values-a-novel-approach-to-orthodontic-diagnosis
#7
Mohamed I Masoud, Neetu Bansal, Jose C Castillo, Amornrut Manosudprasit, Veerasathpurush Allareddy, Arshan Haghi, Hannah C Hawkins, Erik Otárola-Castillo
Background: Orthodontic diagnostic standards generally use the cranial base as a reference and rely on samples selected by orthodontists. Objective: The purpose of this study was to provide male and female standards for a novel non-radiographic approach for orthodontic diagnosis that utilizes 3D dentofacial photogrammetry using the eyes and natural head orientation as references instead of the cranial base. Methods: One hundred and eighty females and 200 males between the ages of 18 and 35 years from 2 modeling agencies were orthodontically screened for near ideal occlusion...
April 1, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28335486/implicit-regularization-for-reconstructing-3d-building-rooftop-models-using-airborne-lidar-data
#8
Jaewook Jung, Yoonseok Jwa, Gunho Sohn
With rapid urbanization, highly accurate and semantically rich virtualization of building assets in 3D become more critical for supporting various applications, including urban planning, emergency response and location-based services. Many research efforts have been conducted to automatically reconstruct building models at city-scale from remotely sensed data. However, developing a fully-automated photogrammetric computer vision system enabling the massive generation of highly accurate building models still remains a challenging task...
March 19, 2017: Sensors
https://www.readbyqxmd.com/read/28328041/sem-microphotogrammetry-a-new-take-on-an-old-method-for-generating-high-resolution-3d-models-from-sem-images
#9
A D Ball, P A Job, A E L Walker
The method we present here uses a scanning electron microscope programmed via macros to automatically capture dozens of images at suitable angles to generate accurate, detailed three-dimensional (3D) surface models with micron-scale resolution. We demonstrate that it is possible to use these Scanning Electron Microscope (SEM) images in conjunction with commercially available software originally developed for photogrammetry reconstructions from Digital Single Lens Reflex (DSLR) cameras and to reconstruct 3D models of the specimen...
March 22, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28320423/in-vivo-estimation-of-the-shoulder-joint-center-of-rotation-using-magneto-inertial-sensors-mri-based-accuracy-and-repeatability-assessment
#10
M Crabolu, D Pani, L Raffo, M Conti, P Crivelli, A Cereatti
BACKGROUND: The human gleno-humeral joint is normally represented as a spherical hinge and its center of rotation is used to construct humerus anatomical axes and as reduction point for the computation of the internal joint moments. The position of the gleno-humeral joint center (GHJC) can be estimated by recording ad hoc shoulder joint movement following a functional approach. In the last years, extensive research has been conducted to improve GHJC estimate as obtained from positioning systems such as stereo-photogrammetry or electromagnetic tracking...
March 21, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28300713/low-cost-smartphone-based-photogrammetry-for-the-analysis-of-cranial-deformation-in-infants
#11
Inés Barbero-García, José Luis Lerma, Ángel Marqués-Mateu, Pablo Miranda
BACKGROUND: Cranial deformation, including deformational plagiocephaly, brachycephaly and craniosynostosis, is a condition that affects a large number of infants. Despite of its prevalence there are no standards for the systematic evaluation of the cranial deformation. Usually, the deformation is manually measured using callipers. However, experts do not agree on the suitability of these measurements to correctly represent the deformation. Other methodologies for evaluation include 3D photography and radiologic scanners...
March 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28283341/neoclassical-canons-of-facial-beauty-do-we-see-the-deviations
#12
Andrej Pavlic, Magda Trinajstic Zrinski, Visnja Katic, Stjepan Spalj
AIM: To explore the presence of neoclassical canons of facial beauty among young people in Croatia and to question possible psychosocial repercussions occurring in those who demonstrate deviations in relation to canons. SUBJECTS AND METHODS: The study was cross-sectional and the sample included 249 subjects (60% female) aged 12-39 (median 20). Their en face and profile photographs were taken in Natural Head Position. Photogrammetry included analysis of nine neoclassical canons of facial beauty originating from the Renaissance...
February 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28280897/3d-photogrammetric-analysis-of-the-nasal-tip-projection-and-derotation-based-on-the-nasal-tip-quadripod-concept
#13
Jong Woo Choi, Young Chul Suh, Shin Young Song, Woo Shik Jeong
BACKGROUND: Regarding septal fixation in nasal tip plasty, the nasal tip tripod theory may require modification. We performed three-dimensional (3D) photogrammetric analysis of the "Skiff graft," which is a quadripod method involving folded conchal cartilages fixated on the caudal septal angle, paired lateral crura reinforced by a derotational conchal cartilage graft, and conjoined medial crus on the columella base. We assessed the efficacy of the Skiff graft in maintaining tip projection and preventing cephalic rotation of the nasal tip...
March 9, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28222933/photogrammetric-3d-skull-photo-superimposition-a-pilot-study
#14
Valeria Santoro, Sergio Lubelli, Antonio De Donno, Alessio Inchingolo, Fulvio Lavecchia, Francesco Introna
The identification of bodies through the examination of skeletal remains holds a prominent place in the field of forensic investigations. Technological advancements in 3D facial acquisition techniques have led to the proposal of a new body identification technique that involves a combination of craniofacial superimposition and photogrammetry. The aim of this study was to test the method by superimposing various computerized 3D images of skulls onto various photographs of missing people taken while they were still alive in cases when there was a suspicion that the skulls in question belonged to them...
April 2017: Forensic Science International
https://www.readbyqxmd.com/read/28213185/a-comparative-study-of-photogrammetric-methods-using-panoramic-photography-in-a-forensic-context
#15
Kayleigh Sheppard, John P Cassella, Sarah Fieldhouse
Taking measurements of a scene is an integral aspect of the crime scene documentation process, and accepted limits of accuracy for taking measurements at a crime scene vary throughout the world. In the UK, there is no published accepted limit of accuracy, whereas the United States has an accepted limit of accuracy of 0.25 inch. As part of the International organisation for Standardisation 17020 accreditation competency testing is required for all work conducted at the crime scene. As part of this, all measuring devices need to be calibrated within known tolerances in order to meet the required standard, and measurements will be required to have a clearly defined limit of accuracy...
February 4, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28195892/establishment-of-a-reliable-horizontal-reference-plane-for-3-dimensional-facial-soft-tissue-evaluation-before-and-after-orthognathic-surgery
#16
Peerasak Chortrakarnkij, Daniel Lonic, Hsiu-Hsia Lin, Lun-Jou Lo
BACKGROUND: This study aims to demonstrate the reliability of our proposed facial reference system in the horizontal axis using 3-dimensional photogrammetry and to find a correlation between this plane and the Frankfurt horizontal (FH) plane. METHODS: Forty-one patients were enrolled. Three-dimensional facial images were taken before and 6 months after orthognathic surgery. Superimposition was carried out, and differences in landmark position were evaluated. Two constant landmarks were selected to construct a reference system within a standardized reference frame...
March 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28194350/changes-in-eyebrow-position-and-movement-with-aging
#17
Jeongseob Park, Sangho Yun, Daegu Son
BACKGROUND: This study evaluated dynamic changes in eyebrow position related to aging. METHODS: Female participants were recruited and separated into two groups aged 20-30 years (the younger group, n=20; mean age, 24.8 years) and 50-70 years (the older group, n=20; mean age, 55.8 years). Photogrammetry was used to determine the eyebrow position at the medial canthus (MC), lateral limbus, lateral canthus, and lateral end point (EP) for 6 actions: smooth opening (the reference action) and closing of the eye, forward gaze, maximum opening and closing of the eye, and maximum frown...
January 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28182594/modified-direct-type-septal-extension-grafts-their-stability-and-usefulness-in-asian-rhinoplasty
#18
So-Eun Han, Kihwan Han, Jaehoon Choi, Tae Bin Yun
BACKGROUND: In Asian rhinoplasty, many autogenous cartilage grafts are required for correction of the nasal tip and columella, but the amount has limitations. A modified direct-type septal extension graft, in continuity with the entire caudal border of the septal cartilage with an edge-to-edge coaptation, can effectively and concomitantly correct the nasal tip and columella deformities using a limited amount of septal cartilage graft. The purpose of this study was to evaluate long-term cosmetic outcomes and stability from the modified direct extension grafts...
March 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28155824/analysis-of-the-structure-of-the-torso-in-the-frontal-plane-in-girls-with-rett-syndrome-taking-into-account-their-functional-status
#19
Monika Małachowska-Sobieska, Katarzyna Barczyk-Pawelec, Zuzanna Marcmiszyn, Ewa Demczuk-Włodarczyk, Beata Skolimowska, Anna Maćków, Agnieszka Miler
BACKGROUND: Rett syndrome is a rare developmental disorder with a genetic background, and scoliosis is one of its many complications. The aim of the present study was to assess the structure of the torso in the frontal plane in RTT. It was assumed that asymmetry of the structure of the torso in the frontal plane would be smaller in girls who are able to maintain a vertical body position. MATERIAL AND METHODS: The study included 14 girls previously diagnosed with RTT aged between 3 and 15 years, who were divided into 2 groups...
March 23, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28144846/virtoscan-a-mobile-low-cost-photogrammetry-setup-for-fast-post-mortem-3d-full-body-documentations-in-x-ray-computed-tomography-and-autopsy-suites
#20
Sören Kottner, Lars C Ebert, Garyfalia Ampanozi, Marcel Braun, Michael J Thali, Dominic Gascho
Injuries such as bite marks or boot prints can leave distinct patterns on the body's surface and can be used for 3D reconstructions. Although various systems for 3D surface imaging have been introduced in the forensic field, most techniques are both cost-intensive and time-consuming. In this article, we present the VirtoScan, a mobile, multi-camera rig based on close-range photogrammetry. The system can be integrated into automated PMCT scanning procedures or used manually together with lifting carts, autopsy tables and examination couch...
March 2017: Forensic Science, Medicine, and Pathology
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