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https://www.readbyqxmd.com/read/28207829/three-dimensional-acetabular-orientation-measurement-in-a-reliable-coordinate-system-among-one-hundred-chinese
#1
Henghui Zhang, Yiping Wang, Songtao Ai, Xiaojun Chen, Liao Wang, Kerong Dai
Determining three-dimensional (3D) acetabular orientation is important for several orthopaedic scenarios, but the complex geometries of both pelvis and acetabulum make measurements of orientation unreliable. Acetabular orientation may also differ between the sexes or racial groups. We aimed to (1) establish and evaluate a novel method for measuring 3D acetabular orientation, (2) apply this new method to a large population of Chinese subjects, and (3) report relevant characteristics of native acetabular orientation in this population...
2017: PloS One
https://www.readbyqxmd.com/read/28203510/midface-osteotomies-for-feminization-of-the-facial-skeleton
#2
T Kalle Lundgren, Filip Farnebo
Facial feminization surgery is a term to describe the surgical alteration of a masculine facial appearance to a more feminine appearance, which is most commonly performed for male-to-female transsexual individuals. To alter the midfacial relations, segmentalized osteotomies were performed in selected patients expanding on the established techniques for facial feminization surgery. All patients underwent a preoperative 3D computerized tomography scan and 3D photography before and after the surgery. The inclusion of the midface in surgery was determined based on the relative projection and angle of the zygomatic body compared with the supraorbital region (the supraorbital region was reduced in all patients)...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28192461/canine-neuroanatomy-development-of-a-3d-reconstruction-and-interactive-application-for-undergraduate-veterinary-education
#3
Hazel Raffan, Julien Guevar, Matthieu Poyade, Paul M Rea
Current methods used to communicate and present the complex arrangement of vasculature related to the brain and spinal cord is limited in undergraduate veterinary neuroanatomy training. Traditionally it is taught with 2-dimensional (2D) diagrams, photographs and medical imaging scans which show a fixed viewpoint. 2D representations of 3-dimensional (3D) objects however lead to loss of spatial information, which can present problems when translating this to the patient. Computer-assisted learning packages with interactive 3D anatomical models have become established in medical training, yet equivalent resources are scarce in veterinary education...
2017: PloS One
https://www.readbyqxmd.com/read/28189113/monodisperse-mesoporous-silica-nanoparticles-of-distinct-topology
#4
Leilei Luo, Yucang Liang, Egil Sev Erichsen, Reiner Anwander
Monodisperse and uniform high-quality MCM(Mobil Composition of Matter)-48-type CMSNs (Cubic Mesoporous Silica Nanoparticles) are readily prepared by simply optimizing the molar ratio of ethanol and surfactant in the system TEOS-CTAB-NaOH-H2O-EtOH (TEOS=tetraethyl orthosilicate, CTAB=cetyltrimethylammonium bromide, EtOH=ethanol). In the absence of ethanol only hexagonal mesoporous silica with ellipsoidal and spherical morphology are obtained. The presence of ethanol drives a mesophase transformation from hexagonal to mixed hexagonal/cubic, further to purely cubic, and finally to a mixed cubic/lamellar...
January 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28178835/low-temperature-thermal-ald-of-a-sinx-interfacial-diffusion-barrier-and-interface-passivation-layer-on-sixge1-x-001-and-sixge1-x-110
#5
Mary Edmonds, Kasra Sardashti, Steven Wolf, Evgueni Chagarov, Max Clemons, Tyler Kent, Jun Hong Park, Kechao Tang, Paul C McIntyre, Naomi Yoshida, Lin Dong, Russell Holmes, Daniel Alvarez, Andrew C Kummel
Atomic layer deposition of a silicon rich SiNx layer on Si0.7Ge0.3(001), Si0.5Ge0.5(001), and Si0.5Ge0.5(110) surfaces has been achieved by sequential pulsing of Si2Cl6 and N2H4 precursors at a substrate temperature of 285 °C. XPS spectra show a higher binding energy shoulder peak on Si 2p indicative of SiOxNyClz bonding while Ge 2p and Ge 3d peaks show only a small amount of higher binding energy components consistent with only interfacial bonds, indicating the growth of SiOxNy on the SiGe surface with negligible subsurface reactions...
February 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28174009/ceramic-strengthening-by-tuning-the-elastic-moduli-of-resin-based-luting-agents
#6
Aloísio O Spazzin, Ataís Bacchi, Rodrigo Alessandretti, Mateus B Santos, Gabriela R Basso, Jason Griggs, Rafael R Moraes
OBJECTIVE: Resin-based luting agents (RBLAs) with tuned elastic moduli (E) were prepared and their influence on the strengthening, reliability, and mode of failure of luted feldspar ceramic was investigated. METHODS: RBLAs with low E (2.6GPa), intermediate E (6.6GPa), and high E (13.3GPa) were prepared and used to coat acid-etched ceramic disks. Positive (untreated ceramic) and negative (acid-etched ceramic) control groups were tested. The response variables (n=30) were biaxial flexural strength (σbf, MPa), characteristic strength (σ0, MPa), and Weibull modulus at the ceramic surface (z=0) and luting agent surface (z=-t2)...
February 4, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28169526/supercapacitive-properties-of-3d-arrayed-polyaniline-hollow-nanospheres-encaging-ruo2-nanoparticles
#7
Hyemin Kwon, Dajung Hong, Ilhwan Ryu, Sanggyu Yim
A major limitation of polyaniline (PANi) electrodes for supercapacitors is the slow rate of ion transport during redox reactions and the resultant easy saturation of areal capacitance with film thickness. In this study, three-dimensionally (3D)-arrayed PANi nanospheres with highly roughened surface nanomorphology were fabricated to overcome this limitation. A hierarchical nanostructure was obtained by polymerizing aniline monomers on a template of 3D-arrayed polystyrene (PS) nanospheres and appropriate oxidative acid doping...
February 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28167334/in-vitro-enamel-erosion-and-abrasion-inhibiting-effect-of-different-fluoride-varnishes
#8
Adílis Kalina Alexandria, Thiago Isidro Vieira, Matheus Melo Pithon, Tatiana Kelly da Silva Fidalgo, Andréa Fonseca-Gonçalves, Ana Maria Gondim Valença, Lúcio Mendes Cabral, Lucianne Cople Maia
OBJECTIVE: To investigate the erosion and abrasion inhibiting effect of CPP-ACP/NaF and xylitol/NaF varnishes. METHODS: Bovine enamel samples (n=40) were exposed to the following treatments (n=10): NaF varnish (Duraphat(®), positive control); CPP-ACP/NaF varnish (MI varnishTM); xylitol/NaF (Profluorid(®)) or distilled and deionized water (MilliQ(®), negative control). The samples were submitted for 3days to 4 cycles/day of erosion (5min in Sprite Zero) and 2 cycles of abrasion/day after the first and last erosive challenge, with a toothbrush machine and slurries of a placebo toothpaste for 15s (50 strokes/s)...
January 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28161205/comparison-of-three-dimensional-scanner-systems-for-craniomaxillofacial-imaging
#9
Paul G M Knoops, Caroline A A Beaumont, Alessandro Borghi, Naiara Rodriguez-Florez, Richard W F Breakey, William Rodgers, Freida Angullia, N U Owase Jeelani, Silvia Schievano, David J Dunaway
Two-dimensional photographs are the standard for assessing craniofacial surgery clinical outcomes despite lacking three-dimensional (3D) depth and shape. Therefore, 3D scanners have been gaining popularity in various fields of plastic and reconstructive surgery, including craniomaxillofacial surgery. Head shapes of eight adult volunteers were acquired using four 3D scanners: 1.5T Avanto MRI, Siemens; 3dMDface System, 3dMD Inc.; M4D Scan, Rodin4D; and Structure Sensor, Occipital Inc. Accuracy was evaluated as percentage of data within a range of 2 mm from the 3DMDface System reconstruction, by surface-to-surface root mean square (RMS) distances, and with facial distance maps...
January 7, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
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
#10
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/28138429/evaluation-of-early-phase-18-f-florbetaben-pet-acquisition-in-clinical-routine-cases
#11
Sonja Daerr, Matthias Brendel, Christian Zach, Erik Mille, Dorothee Schilling, Mathias Johannes Zacherl, Katharina Bürger, Adrian Danek, Oliver Pogarell, Andreas Schildan, Marianne Patt, Henryk Barthel, Osama Sabri, Peter Bartenstein, Axel Rominger
OBJECTIVES: In recent years several [(18)F]-labelled amyloid PET tracers have been developed and have obtained clinical approval. There is accumulating evidence that early (post injection) acquisitions with these tracers are equally informative as conventional blood flow and metabolism studies for diagnosis of Alzheimer's disease, but there have been few side-by-side studies. Therefore, we investigated the performance of early acquisitions of [(18)F]-florbetaben (FBB) PET compared to [(18)F]-fluorodeoxyglucose (FDG) PET in a clinical setting...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28135637/fabrication-and-characterization-of-baghdadite-nanostructured-scaffolds-by-space-holder-method
#12
Sorour Sadeghzade, Fateme Shamoradi, Rahmatollah Emadi, Fariborz Tavangarian
Porous baghdadite scaffold has received great attention as a candidate for bone tissue engineering application due to its remarkable bioactivity, biocompatibility, and good bone formation ability. A few studies have been focused on improving the mechanical properties of baghdadite scaffolds. Recently, space holder method has been introduced as a new and viable technique to prepare bioceramic scaffolds with interconnected pores and suitable mechanical properties. In this study, for the first time, 3D baghdadite scaffolds with interconnected porosity were produced using space holder method...
January 24, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28129180/surface-reconstruction-via-fusing-sparse-sequence-of-depth-images
#13
Long Yang, Qingan Yan, Yanping Fu, Chunxia Xiao
Handheld scanning using commodity depth cameras provides a flexible and low-cost manner to get 3D models. The existing methods scan a target by densely fusing all the captured depth images, yet most frames are redundant. The jittering frames inevitably embedded in handheld scanning process will cause feature blurring on the reconstructed model and even trigger the scan failure (i.e., camera tracking losing). To address these problems, in this paper, we propose a novel sparse-sequence fusion (SSF) algorithm for handheld scanning using commodity depth cameras...
January 25, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28122181/two-dimensional-folding-of-polypeptides-into-molecular-nanostructures
#14
Stephan Rauschenbach, Gordon Rinke, Rico Gutzler, Sabine Abb, Alyazan Albarghash, Duy Le, Talat S Rahman, Michael Dürr, Ludger Harnau, Klaus Kern
Herein we report the fabrication of molecular nanostructures on surfaces via two-dimensional~(2d) folding of the nine amino-acid peptide bradykinin (BK). Soft-landing electrospray ion beam deposition (ES-IBD) in conjunction with high-resolution imaging by scanning tunneling microscopy (STM) is used to fabricate and investigate the molecular nanostructures. Subnanometer resolved images evidence the large conformational freedom of the molecules if thermal motion is inhibited, and the formation of stable uniform dimers of only one specific conformation when diffusion can take place...
January 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28114847/virtual-three-dimensional-placentoscopy-a-new-approach-to-assess-residual-anastomoses-following-laser-photocoagulation-in-twin-to-twin-transfusion-syndrome
#15
Roberto Noya Galluzo, Mario Júlio Franco, Leila Wessler Faust, Karine Souza Dacorégio, Jair Roberto da Silva Braga, Heron Werner, Edward Araujo Júnior
Twin-to-twin transfusion syndrome (TTTS) complicates 10% of monochorionic twin pregnancies and it is consequence of an unbalanced exchange blood through the vascular anastomoses at placental surface. If not treated, mortality rates in TTTS may be as high as 80 to 100%. Laser photocoagulation of the placental anastomoses is the first treatment option, however in some situations the damage of the placenta in the postpartum may become difficult the residual anastomoses identification. We propose a new non-invasive technique to assess the residual anastomoses using computed tomography (CT) scan data to generate a three-dimensional (3D) virtual placentoscopy...
January 23, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28114006/adaptive-3d-face-reconstruction-from-unconstrained-photo-collections
#16
Joseph Roth, Yiying Tong, Xiaoming Liu
Given a photo collection of "unconstrained" face images of one individual captured under a variety of unknown pose, expression, and illumination conditions, this paper presents a method for reconstructing a 3D face surface model of the individual along with albedo information. Unlike prior work on face reconstruction that requires large photo collections, we formulate an approach to adapt to photo collections with a high diversity in both the number of images and the image quality. To achieve this, we incorporate prior knowledge about face shape by fitting a 3D morphable model to form a personalized template, following by using a novel photometric stereo formulation to complete the fine details, under a coarse-to-fine scheme...
December 7, 2016: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28110716/automated-diagnosis-of-macular-edema-and-central-serous-retinopathy-through-robust-reconstruction-of-3d-retinal-surfaces
#17
Adeel M Syed, Taimur Hassan, M Usman Akram, Samra Naz, Shehzad Khalid
BACKGROUND AND OBJECTIVES: Macular diseases tend to damage macula within human retina due to which the central vision of a person is affected. Macular edema (ME) and central serous retinopathy (CSR) are two of the most common macular diseases. Many researchers worked on automated detection of ME from optical coherence tomography (OCT) and fundus images, whereas few researchers have worked on diagnosing central serous retinopathy. But this paper proposes a fully automated method for the classification of ME and CSR through robust reconstruction of 3D OCT retinal surfaces...
December 2016: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28109797/evaluation-of-sleep-bruxism-with-a-novel-designed-occlusal-splint
#18
Kentaro Hirai, Tomoko Ikawa, Yuko Shigeta, Shuji Shigemoto, Takumi Ogawa
PURPOSE: This report presents our evaluation system that assesses sleep bruxism. The characteristics and fabrication process of our novel designed splint, and the analysis process of our system are presented. METHODS: The subjects were 17 volunteers. The splint was fabricated with a self-curing resin compounded with an amino-acid powder for easy wear on the semi-adjustable articulator, and adjusted for a full-balanced occlusion. An impression of the splint, located on the cast, was taken before and after it was worn...
January 18, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28105886/interobserver-delineation-uncertainty-in-involved-node-radiation-therapy-inrt-for-early-stage-hodgkin-lymphoma-on-behalf-of-the-radiotherapy-committee-of-the-eortc-lymphoma-group
#19
Marianne C Aznar, Theodore Girinsky, Anne Kiil Berthelsen, Berthe Aleman, Max Beijert, Martin Hutchings, Yolande Lievens, Paul Meijnders, Peter Meidahl Petersen, Deborah Schut, Maja V Maraldo, Richard van der Maazen, Lena Specht
BACKGROUND AND PURPOSE: In early-stage classical Hodgkin lymphoma (HL) the target volume nowadays consists of the volume of the originally involved nodes. Delineation of this volume on a post-chemotherapy CT-scan is challenging. We report on the interobserver variability in target volume definition and its impact on resulting treatment plans. MATERIALS AND METHODS: Two representative cases were selected (1: male, stage IB, localization: left axilla; 2: female, stage IIB, localizations: mediastinum and bilateral neck)...
January 20, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28099950/nano-particle-assembled-porous-core-shell-znmn2o4-microspheres-with-superb-performance-for-lithium-batteries
#20
Tong Zhang, Huijuan Yue, Hailong Qiu, Yingjin Wei, Chunzhong Wang, Gang Chen, Dong Zhang
Porous ZnMn2O4 microspheres were prepared via a facile co-precipitation method followed by calcination at various temperatures and evaluated as anode materials for lithium ion batteries. The sample prepared at 600 °C outperformed the other samples in terms of electrochemical performance with high reversible capacity, high-rate capability, and excellent cycling performance. The capacity of the sample remained as high as 999 mAh g(-1) at a current rate of 100 mA g(-1) after 50 cycles-one of the best ever reported for ZnMn2O4-based materials...
March 10, 2017: Nanotechnology
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