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https://www.readbyqxmd.com/read/29332346/vaginal-packing-volume-impact-on-dose-parameters-during-radiography-and-computed-tomography-based-postoperative-brachytherapy-of-cervical-carcinoma
#1
Aleksandar Tomasevic, Vesna Plesinac-Karapandzic, Suzana Stojanovic-Rundic, Sandra Vuckovic, Jasmina Stevanovic, Dusica Gavrilovic, Mirjan Nadrljanski
PURPOSE: To investigate the influence of the vaginal packing volume on the registered dose parameters evaluated by radiography (2D) and computed tomography (CT) (3D) based brachytherapy planning in cervical cancer patients treated with postoperative radiotherapy. METHODS: The postoperative radiotherapy was performed in 40 cervical cancer patients with increased risk for disease relapse. Both, radiography and CT based brachytherapy planning were done in all patients...
November 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29332169/measuring-cochlear-duct-length-in-asian-population-worth-giving-a-thought
#2
Mohnish Grover, Shitanshu Sharma, Shashank Nath Singh, Tanmaya Kataria, Rajendra Singh Lakhawat, Man Prakash Sharma
INTRODUCTION: The anatomy of the cochlea forms the basis for a successful cochlear implantation. Cochlear duct length (CDL) is defined as the length of the scala media as measured from the middle of the round window to helicotrema. Preoperative measurement of CDL is particularly important when precise intracochlear electrode array placement is desired. It can be done both histologically and radiologically. Preoperative high-resolution computed tomography (HRCT) scan which forms an integral part of cochlear implant workup is a useful tool to calculate CDL using 3D reconstructions...
January 13, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29330589/impact-of-valve-less-vs-standard-insufflation-on-pneumoperitoneum-volume-inflammation-and-peritoneal-physiology-in-a-laparoscopic-sigmoid-resection-experimental-model
#3
Michele Diana, Eric Noll, Andras Legnèr, Seong-Ho Kong, Yu-Yin Liu, Luigi Schiraldi, Francesco Marchegiani, Jordan Bano, Bernard Geny, Anne-Laure Charles, Bernard Dallemagne, Véronique Lindner, Didier Mutter, Pierre Diemunsch, Jacques Marescaux
BACKGROUND: Standard insufflators compensate for intra-abdominal pressure variations with pressure spikes. Our aim was to evaluate the impact of a stable, low-pressure pneumoperitoneum induced by a valve-less insufflator, on working space, hemodynamics, inflammation, and peritoneal physiology, in a model of laparoscopic sigmoid resection. MATERIALS AND METHODS: Twelve pigs (47 ± 3.3 kg) were equipped for invasive hemodynamic monitoring and randomly assigned to Standard (n = 6) vs...
January 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29330369/bio-templated-fabrication-of-three-dimensional-network-activated-carbons-derived-from-mycelium-pellets-for-supercapacitor-applications
#4
Junnan Hao, Yajing Huang, Chun He, Wenjun Xu, Libei Yuan, Dong Shu, Xiaona Song, Tao Meng
In this work, a three-dimensional porous mycelium-derived activated carbon (3D-MAC) was fabricated via a facile bio-templating method using mycelium pellets as both the carbon source and the bio-template. After ZnCl2 activation and high-temperature carbonization, the specific thread-like chain structure of mycelium in the pellets can be maintained effectively. The hyphae and junctions of the cross-linking hyphae form nanowires and carbon nanoparticles that link with the neighboring nanoparticles to form a network structure...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330179/influence-of-type-i-fimbriae-and-fluid-shear-stress-on-bacterial-behavior-and-multicellular-architecture-of-early-escherichia-coli-biofilms-at-single-cell-resolution
#5
Liyun Wang, Robert Keatch, Qi Zhao, John A Wright, Clare E Bryant, Anna L Redmann, Eugene M Terentjev
Biofilm formation on abiotic surfaces in food and medical industry can cause severe contamination and infection, yet how biological and physical factors determine cellular architecture of early biofilms and bacterial behavior of the constituent cells remains largely unknown. In this study we examine the specific role of type-I fimbriae in nascent stages of biofilm formation and the response of micro-colonies to environmental flow shear at single-cell resolution. The results show that type-I fimbriae are not required for reversible adhesion from plankton, but critical for irreversible adhesion of Escherichia coli (E...
January 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29329240/effective-data-driven-calibration-for-a-galvanometric-laser-scanning-system-using-binocular-stereo-vision
#6
Junchao Tu, Liyan Zhang
A new solution to the problem of galvanometric laser scanning (GLS) system calibration is presented. Under the machine learning framework, we build a single-hidden layer feedforward neural network (SLFN)to represent the GLS system, which takes the digital control signal at the drives of the GLS system as input and the space vector of the corresponding outgoing laser beam as output. The training data set is obtained with the aid of a moving mechanism and a binocular stereo system. The parameters of the SLFN are efficiently solved in a closed form by using extreme learning machine (ELM)...
January 12, 2018: Sensors
https://www.readbyqxmd.com/read/29328531/thalamic-atrophy-in-ms-an-mri-marker-of-neurodegeneration-throughout-disease
#7
Christina J Azevedo, Steven Y Cen, Sankalpa Khadka, Shuang Liu, John Kornak, Yonggang Shi, Ling Zheng, Stephen L Hauser, Daniel Pelletier
OBJECTIVE: Thalamic volume is a candidate MRI-based marker associated with neurodegeneration to hasten development of neuroprotective treatments. Our objective is to describe the longitudinal evolution of thalamic atrophy in MS and normal aging, and to estimate sample sizes for study design. METHODS: 601 subjects (2632 MRI scans) were analyzed. 520 subjects with relapse-onset MS [CIS(90); RR(392); SP(38)] underwent annual standardized 3T MRI scans for an average of 4...
January 12, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29328329/speeding-up-raman-spectral-imaging-by-the-three-dimensional-low-rank-estimation-method
#8
Qifeng Li, Xiangyun Ma, Huijie Wang, Yang Wang, Xinwei Zheng, Da Chen
Raman spectral imaging has been widely used as a very important analytical tool in various fields. For obtaining the high spectral signal-to-noise ratio Raman images, the long integration time is necessary, which is placing a limit on the application of Raman spectral imaging. We introduce a simple and feasible numerical method of the Three-dimensional Low Rank Estimation (3D-LRE), which can speed up the data acquisition process of the Raman spectral imaging. The spectral signal-to-noise ratio of the Raman images can be increased by over 75 times and the speed of the data acquisition can be improved by over 30 times...
January 8, 2018: Optics Express
https://www.readbyqxmd.com/read/29328211/effects-of-defocus-on-the-transfer-function-of-coherence-scanning-interferometry
#9
Rong Su, Matthew Thomas, Richard Leach, Jeremy Coupland
Coherence scanning interferometry (CSI) offers three-dimensional (3D) measurement of surface topography with high precision and accuracy. Defocus within the interferometric objective lens, however, is commonly present in CSI measurements and reduces both the resolving power of the imaging system and the ability to measure tilted surfaces. This Letter extends the linear theory of CSI to consider the effects of defocus on the 3D transfer function and the point spread function in an otherwise ideal CSI instrument...
January 1, 2018: Optics Letters
https://www.readbyqxmd.com/read/29328147/optical-diffraction-tomography-with-fully-and-partially-coherent-illumination-in-high-numerical-aperture-label-free-microscopy-invited
#10
Juan M Soto, José A Rodrigo, Tatiana Alieva
Quantitative label-free imaging is an important tool for the study of living microorganisms that, during the last decade, has attracted wide attention from the optical community. Optical diffraction tomography (ODT) is probably the most relevant technique for quantitative label-free 3D imaging applied in wide-field microscopy in the visible range. The ODT is usually performed using spatially coherent light illumination and specially designed holographic microscopes. Nevertheless, the ODT is also compatible with partially coherent illumination and can be realized in conventional wide-field microscopes by applying refocusing techniques, as it has been recently demonstrated...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29328131/low-cost-three-dimensional-millimeter-wave-holographic-imaging-system-based-on-a-frequency-scanning-antenna
#11
Vahid Amin Nili, Ehsan Mansouri, Zahra Kavehvash, Mohammad Fakharzadeh, Mahdi Shabany, Amin Khavasi
In this paper, a closed-form two-dimensional reconstruction technique for hybrid frequency and mechanical scanning millimeter-wave (MMW) imaging systems is proposed. Although being commercially implemented in many imaging systems as a low-cost real-time solution, the results of frequency scanning systems have been reconstructed numerically or have been reported as the captured raw data with no clear details. Furthermore, this paper proposes a new framework to utilize the captured data of different frequencies for three-dimensional (3D) reconstruction based on novel proposed closed-form relations...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29328080/subsurface-metrology-using-scanning-white-light-interferometry-absolute-z-coordinates-deep-inside-displays
#12
Anton Nolvi, Ivan Kassamakov, Edward Hæggström
Mobile devices with interactive displays are ubiquitous commodities. Efficient quality control (QC) drives competitiveness. Scanning white light interferometry imaging offers a fast and nondestructive tool for QC purposes. Relying on optical compensation and image stitching, one can rapidly and cost-effectively produce sharp 3D images of a display's inner structures with a few nanometers' accuracy along the z direction. As a practical example, 3D images of a mobile device display revealed 0.92±0.02  μm height variation in the top glass assembly...
January 1, 2018: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29327731/transoral-robotic-surgery-in-eagle-s-syndrome-our-experience-on-four-patients
#13
D H Kim, Y H Lee, D Cha, S H Kim
Eagle's syndrome is characterised by focal pain in the tonsillar fossa on wide mouth opening or head rotation and various accompanying symptoms. While the syndrome is difficult to diagnose, shortening the styloid process via a transoral or transcervical surgical approach has been shown to be the most effective treatment. The aim of this article was to document our experience with a transoral robotic approach to treat Eagle's syndrome and to present the outcomes of four patients. We reviewed the cases of four patients with Eagle's syndrome who underwent transoral robotic surgery (TORS)...
December 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29327553/-preliminary-development-of-drill-template-assisted-placement-of-reverse-intramedullary-lag-screw-for-superior-ramus-of-pubis-using-three-dimentional-print-technique
#14
Yi Zheng, Xin-Hua Yuan, Wei-Bin Wang, Qing-Jiang Pang
OBJECTIVE: To investigate the feasibility of a drill template for the placement of reverse intramedullary lag screws on the outside of the pubis based on digital design and 3D printing technology. METHODS: The preoperative CT images of a 23-year-old male patient with pelvic fracture were collected retrospectively. According to the Young and Burgess classification, the type of pelvic fracture was LC IIwith the 3D printing technology. The data was reconstructed by 3D imaging reconstruction software to produce 1:1 three dimensional model...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29327547/-finite-element-analysis-on-the-effect-of-lateral-wedge-insole-intervention-on-the-contact-characteristics-of-the-subtalar-joint
#15
En-Chang Zhou, Ping Tang, Chuan-Ying Zhu, Shi-Ming Liu
OBJECTIVE: To establish a three-dimensional finite element model of the lower limb bones, and investigate the changes of the contact characteristics of the subtalar joint after using laterally wedge insole intervention. METHODS: Using the reverse modeling technology, the lower limb bones of normal adult volunteers was scanned by CT. Mimics 10.0 and Geomagic Studio 6.0 software were used to reconstruct the 3D morphology of bones and external soft tissue of the feet...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29325886/comparison-analysis-of-orbital-shape-and-volume-in-unilateral-fractured-orbits
#16
Johanna Nilsson, Johan Nysjö, Anders-Petter Carlsson, Andreas Thor
Facial fractures often result in changes of the orbital volume. These changes can be measured in three-dimensional (3D) computed tomography (CT) scans for preoperative planning and postoperative evaluation. The aim of this study was to analyze the orbital volume and shape before and after surgical treatment of unilateral orbital fractures using semi-automatic image segmentation and registration techniques. The orbital volume in 21 patients was assessed by a semi-automatic model-based segmentation method. The fractured orbit was compared relative to the contralateral orbit...
December 21, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29324699/led-ct-scan-for-ph-distribution-on-a-cross-section-of-cell-culture-medium
#17
Nobuya Higashino, Toshio Takayama, Hiroaki Ito, Mitsuhiro Horade, Yasutaka Yamaguchi, Chia-Hung Dylan Tsai, Makoto Kaneko
In cell culture, the pH of the culture medium is one of the most important conditions. However, the culture medium may have non-uniform pH distribution due to activities of cells and changes in the environment. Although it is possible to measure the pH distribution with an existing pH meter using distributed electrodes, the method involves direct contact with the medium and would greatly increase the risk of contamination. Here in this paper, we propose a computed tomography (CT) scan for measuring pH distribution using the color change of phenol red with a light-emitting diode (LED) light source...
January 11, 2018: Sensors
https://www.readbyqxmd.com/read/29323732/analogous-on-axis-interference-topographic-phase-microscopy-aoitpm
#18
P Xiu, Q Liu, X Zhou, Y Xu, C Kuang, X Liu
The refractive index (RI) of a sample as an endogenous contrast agent plays an important role in transparent live cell imaging. In tomographic phase microscopy (TPM), 3D quantitative RI maps can be reconstructed based on the measured projections of the RI in multiple directions. The resolution of the RI maps not only depends on the numerical aperture of the employed objective lens, but also is determined by the accuracy of the quantitative phase of the sample measured at multiple scanning illumination angles...
January 11, 2018: Journal of Microscopy
https://www.readbyqxmd.com/read/29323728/3d-reconstruction-of-prostate-cancer-architecture-with-serial-immunohistochemical-sections-hallmarks-of-tumour-growth-tumour-compartmentalization-and-implications-for-grading-and-heterogeneity
#19
Yuri Tolkach, Stefan Thomann, Glen Kristiansen
BACKGROUND: Conventional morphology of the prostate cancer (PCA) considers only two-dimensional architecture of the tumour. Our aim was to examine the feasibility of 3D-reconstruction of tumour morphology based on multiple consecutive histological sections and to decipher relevant features of PCA architecture. METHODS: Seventy-five consecutive histological sections (5μm) of a typical prostate adenocarcinoma (Gleason-Score 3+4=7) were immunostained (Pan-Cytokeratin) and scanned for further 3D reconstructions with Fiji / ImageJ software...
January 11, 2018: Histopathology
https://www.readbyqxmd.com/read/29322318/total-knee-arthroplasty-with-unexplained-pain-new-insights-from-kinematics
#20
Célia Planckaert, Gabriel Larose, Pierre Ranger, Marc Lacelle, Alexandre Fuentes, Nicola Hagemeister
INTRODUCTION: Up to 20% of total knee arthroplasty patients remain unsatisfied post-surgery, and a large proportion of them report anterior knee pain. This study aims to verify whether patients who experience anterior knee pain after total knee arthroplasty (TKA) will exhibit kinematic characteristics similar to those associated with patellofemoral syndrome, including in the frontal and transverse planes. MATERIALS AND METHODS: Using four different assessment methods [radiological, patient-reported outcome, musculoskeletal assessment with functional performance testing, and a 3D kinematic assessment during gait], the clinical and 3D knee kinematic profiles of three groups were compared: a painful and an asymptomatic TKA group and a healthy control group...
January 10, 2018: Archives of Orthopaedic and Trauma Surgery
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