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https://www.readbyqxmd.com/read/28213185/a-comparative-study-of-photogrammetric-methods-using-panoramic-photography-in-a-forensic-context
#1
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
#2
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...
February 14, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28194350/changes-in-eyebrow-position-and-movement-with-aging
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28118231/higher-dose-of-dexamethasone-does-not-further-reduce-facial-swelling-after-orthognathic-surgery-a-randomized-controlled-trial-using-3-dimensional-photogrammetry
#7
Hsiu Hsia Lin, Sun-Goo Kim, Hye-Young Kim, Lien-Shin Niu, Lun-Jou Lo
PURPOSE: The objective of this prospective, double-blind, randomized clinical trial was to compare the effect of 2 dexamethasone dosages on reducing facial swelling after orthognathic surgery through 3-dimensional (3D) photogrammetry. PATIENTS AND METHODS: Patients were classified into group 1 (control group) and group 2 (study group), depending on the administered dexamethasone dosage (5 and 15 mg, respectively). Three-dimensional images were recorded at 5 time points: preoperative (T0) and postoperative at 48 ± 6 hours (T1), 1 week (T2), 1 month (T3), and 6 months (T4)...
January 23, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28113589/convex-hull-aided-registration-method-charm
#8
Jingfan Fan, Jian Yang, Yitian Zhao, Danni Ai, Yonghuai Liu, Ge Wang, Yongtian Wang
Non-rigid registration finds many applications such as photogrammetry, motion tracking, model retrieval, and object recognition. In this paper we propose a novel convex hull aided registration method (CHARM) to match two point sets subject to a non-rigid transformation. Firstly, two convex hulls are extracted from the source and target respectively. Then, all points of the point sets are projected onto the reference plane through each triangular facet of the hulls. From these projections, invariant features are extracted and matched optimally...
August 31, 2016: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28088887/-improvement-of-lumbal-motor-control-and-trunkmuscle-conditions-with-a-novel-low-back-pain-prevention-exercise-program
#9
Viktória Kovácsné Bobály, Brigitta Szilágyi, Alexandra Makai, Ákos Koller, Melinda Járomi
INTRODUCTION: Ballet dancers often suffer from low back pain. AIM: Low back pain can be reduced by strengthening the core muscles with the help of a special exercise program. MATERIALS AND METHODS: In the study 62 ballet dancer women (average age: 14.89 ± 1.21 years) were included. Intervention group: n = 30 participant, average age: 14.86 ± 1.00 years, control group: n = 32 participant, average age: 14.91 ± 1.37 years. We examined the pain intensity that occurs during training with visual analog scale, the habitual posture with photogrammetry, the abdominal muscle strength with Kraus-Weber test, the static muscle strength of the trunk muscles with core test and the lumbar motor control with leg lowering test...
January 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28069258/reference-values-for-human-posture-measurements-based-on-computerized-photogrammetry-a-systematic-review
#10
Ana Freire Macedo Ribeiro, Anke Bergmann, Thiago Lemos, Antônio Guilherme Pacheco, Maitê Mello Russo, Laura Alice Santos de Oliveira, Erika de Carvalho Rodrigues
OBJECTIVE: The main objective of this study was to review the literature to identify reference values for angles and distances of body segments related to upright posture in healthy adult women with the Postural Assessment Software (PAS/SAPO). METHODS: Electronic databases (BVS, PubMed, SciELO and Scopus) were assessed using the following descriptors: evaluation, posture, photogrammetry, physical therapy, postural alignment, postural assessment, and physiotherapy...
January 6, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28059781/wing-kinematics-measurement-and-aerodynamics-of-a-dragonfly-in-turning-flight
#11
Chengyu Li, Haibo Dong
This study integrates high-speed photogrammetry, 3D surface reconstruction, and computational fluid dynamics to explore a dragonfly (Erythemis Simplicicollis) in free flight. Asymmetric wing kinematics and the associated aerodynamic characteristics of a turning dragonfly are analyzed in detail. Quantitative measurements of wing kinematics show that compared to the outer wings, the inner wings sweep more slowly with a higher angle of attack during the downstroke, whereas they flap faster with a lower angle of attack during the upstroke...
February 3, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28058777/platysma-sparing-vascularized-submental-lymph-node-flap-transfer-for-extremity-lymphedema
#12
Igor Poccia, Chia-Yu Lin, Ming-Huei Cheng
BACKGROUND AND OBJECTIVES: Due to its consistent vascular and lymphatic anatomy, the vascularized submental lymph node flap is a reliable option for lymphedema treatment. Despite these advantages, flap harvest requires resection of platysma, which may cause a marginal mandibular nerve pseudo-paralysis. The aim of this study was to investigate the donor site morbidity of an innovative platysma-sparing vascularized submental lymph node flap transfer for treating extremity lymphedema. METHODS: Ten patients undergoing platysma sparing submental lymph-node flap harvest were prospectively enrolled in the study and compared with a control group of 10 patients who underwent standard submental lymph-node flap harvest...
January 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28047085/th-ab-202-08-a-robust-real-time-surface-reconstruction-method-on-point-clouds-captured-from-a-3d-surface-photogrammetry-system
#13
W Liu, A Sawant, D Ruan
PURPOSE: Surface photogrammetry (e.g. VisionRT, C-Rad) provides a noninvasive way to obtain high-frequency measurement for patient motion monitoring in radiotherapy. This work aims to develop a real-time surface reconstruction method on the acquired point clouds, whose acquisitions are subject to noise and missing measurements. In contrast to existing surface reconstruction methods that are usually computationally expensive, the proposed method reconstructs continuous surfaces with comparable accuracy in real-time...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046401/th-cd-207a-07-prediction-of-high-dimensional-state-subject-to-respiratory-motion-a-manifold-learning-approach
#14
W Liu, A Sawant, D Ruan
PURPOSE: The development of high dimensional imaging systems (e.g. volumetric MRI, CBCT, photogrammetry systems) in image-guided radiotherapy provides important pathways to the ultimate goal of real-time volumetric/surface motion monitoring. This study aims to develop a prediction method for the high dimensional state subject to respiratory motion. Compared to conventional linear dimension reduction based approaches, our method utilizes manifold learning to construct a descriptive feature submanifold, where more efficient and accurate prediction can be performed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28033044/caliper-method-versus-digital-photogrammetry-for-assessing-arch-height-index-in-pregnant-women
#15
Kathryn D Harrison, Jean L McCrory
BACKGROUND: Foot anthropometry may be altered during pregnancy. Pregnant women often report lower-extremity pain that may be related to these alterations. The Arch Height Index Measurement System is a common method of foot arch assessment; however, the required calipers are costly and are not widely available. Thus, we compared the reliability of a digital photogrammetry method of arch height index (AHI) assessment with that of the Arch Height Index Measurement System. METHODS: Ten pregnant women (mean ± SD: age, 29 ± 4 years; height, 166...
November 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27992167/the-eye-of-the-medusa-xrf-imaging-reveals-unknown-traces-of-antique-polychromy
#16
Matthias Alfeld, Maud Mulliez, Philippe Martinez, Kevin Cain, Philippe Jockey, Philippe Walter
The colorful decoration of statues and buildings in antique times is commonly described by the term antique polychromy. It is well-known among scholars but less so to the general public, and its exact form is the subject of research. In this paper we discuss results obtained from the frieze of the Siphnian Treasury in the Sanctuary of Delphi (Greece). We will present the first application of a mobile instrument for macro-XRF imaging for the in situ investigation of antique polychromy and show that it allows one to identify significant traces not visible to the naked eye and not detectable by XRF spot measurements or any other mobile, noninvasive method...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/27987469/investigation-of-associations-between-recurrence-of-major-depressive-disorder-and-spinal-posture-alignment-a-quantitative-cross-sectional-study
#17
Janette Z Canales, Juliana T Fiquer, Rodolfo N Campos, Márcio Gerhardt Soeiro-de-Souza, Ricardo Alberto Moreno
The aim of this study was to investigate associations between poor spinal posture and the recurrence of major depressive episodes and severity of symptoms in patients with major depressive disorder (MDD). This was a cross-sectional quantitative study of MDD patients. Outpatients were recruited from consecutive admissions at a mood disorders unit of a tertiary psychiatric hospital. Of 136 MDD patients, 72 (53 women, 19 men; mean age, 42.4±9.1years) met all the criteria and completed the study. Forty-one patients were classified with a recurrent episode (RE) of MDD and 31 with a single episode (SE)...
December 12, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27913880/forensic-3d-documentation-of-skin-injuries
#18
Chiara Villa
An accurate and precise documentation of injuries is fundamental in a forensic pathological context. Photographs and manual measurements are taken of all injuries during autopsies, but ordinary photography projects a 3D wound on a 2D space. Using technologies such as photogrammetry, it is possible to create 3D detailed, to-scale, true-color documentation of skin injuries from 2D pictures. A comparison between the measurements of 165 lesions taken during autopsies and on photogrammetrically processed pictures was performed...
December 2, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27904809/a-revision-of-tetrapod-footprints-from-the-late-carboniferous-of-the-west-midlands-uk
#19
Luke E Meade, Andrew S Jones, Richard J Butler
A series of sandstone slabs from Hamstead, Birmingham (West Midlands, UK), preserve an assemblage of tetrapod trackways and individual tracks from the Enville Member of the Salop Formation (late Carboniferous: late Moscovian-Kasimovian). This material has received limited previous study, despite being one of the few British sites to preserve Carboniferous tetrapod footprints. Here, we restudy and revise the taxonomy of this material, and document it using 3D models produced using photogrammetry. The assemblage is dominated by large tracks assigned to Limnopus isp...
2016: PeerJ
https://www.readbyqxmd.com/read/27890100/sex-and-ancestry-assessment-of-brazilian-crania-using-semi-automatic-mesh-processing-tools
#20
Mikoláš Jurda, Petra Urbanová
The present paper aims to test performances of semi-automatic tools for mesh-to-mesh processing while assessing sex and ancestry in documented human crania. The studied sample of 80 human crania, which originated in two documented Brazilian collections (São Paulo, Brazil) was digitized using photogrammetry and laser scanning. 3D cranial morphology was quantified by computing inter-mesh dissimilarity measures using in-house freeware FIDENTIS Analyst (www.fidentis.com). Numerical outputs were further processed using Discriminant Function Analysis and Canonical Variant Analysis in order to classify models into sex and ancestry groups...
November 2016: Legal Medicine
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