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Mathew R Voisin, Christopher D Witiw, Ryan Deorajh, Daipayan Guha, Adetunji Oremakinde, Shelly Wang, Victor Yang
BACKGROUND / OBJECTIVE: Multi-level spondylolysis is a rare cause of progressive lower back pain and patients that fail conservative management are treated surgically. Direct repair methods can maintain mobility and lead to decreased morbidity compared with spinal fusion in single-level spondylolysis. In this paper, we present a patient with non-adjacent multi-level spondylolysis that underwent the 'smiley face' technique of direct multi-level repair without fusion using 3D intraoperative spinal navigation...
October 17, 2017: World Neurosurgery
Craig R Audin, Shima Aran, Victorine V Muse, Gerald F Abbott, Jeanne B Ackman, Amita Sharma, Carol C Wu, Mannudeep K Kalra, Theresa C McLoud, Jo-Anne O Shepard, Florian J Fintelmann, Matthew D Gilman
OBJECTIVES: To compare image quality, visibility of anatomic landmarks, tubes and lines, and other clinically significant findings on portable (bedside) chest radiographs acquired with wireless direct radiography (DRw) and computed radiography (CR). METHODS: In a prospective IRB-approved and HIPAA-compliant study, portable DRw (DRX-1C mobile retrofit portable wireless direct radiography, CareStream Inc., Rochester, NY) and portable CR (AGFA CR (DXG) version; NIM2103, AGFA Healthcare, Ridgefield Park, NJ) images of the chest were acquired within 24-hours in 80 patients in the intensive care unit (ICU)...
September 21, 2017: Current Problems in Diagnostic Radiology
Caglar Aytekin, Jarno Nikkanen, Moncef Gabbouj
In this paper, we provide a novel dataset designed for camera independent color constancy research. Camera independence corresponds to the robustness of an algorithm's performance when run on images of the same scene taken by different cameras. Accordingly, the images in our database correspond to several lab and field scenes each of which is captured by three different cameras with minimal registration errors. The lab scenes are also captured under five different illuminations. The spectral responses of cameras and the spectral power distributions of the lab light sources are also provided, as they may prove beneficial for training future algorithms to achieve color constancy...
October 17, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
Shinjiro Kaneko, Ken Ishii, Kota Watanabe, Takashi Tsuji, Masaya Nakamura, Morio Matsumoto, Yoshiyuki Yato, Takashi Asazuma
PURPOSE: Hinge-like hyper-mobility is occasionally observed at the atlanto-occipital (O-C1) joint. However, it has not been clear if this kind of hinge-like hyper-mobility at the O-C1 joint should be regarded as "pathologic", or referred to as "instability". To solve this issue, we aimed to establish a reliable radiographic assessment method for this specific type of O-C1 instability and figure out the "standard value" for the range of motion (ROM) of the O-C1 joint. METHODS: To figure out the standard range of the O-C1 angle, we acquired magnetic resonance imaging (MRI) sagittal views of the cervical spine for 157 healthy volunteers [average: 37...
October 20, 2017: European Spine Journal
Jithin Orville Lobo, Joe Joseph Cherian, Arnav Sahu
INTRODUCTION: Acute concomitant rupture of both anterior cruciate ligament (ACL) and patellar tendon is a rare injury. The diagnosis of either of the injuries may be missed on clinical examination in the emergency room. A high index of suspicion is necessary when active extension is absent, and necessary investigations like ultrasound or magnetic resonance imaging (MRI) should be done to confirm the diagnosis. There are no fixed treatment protocols in these injuries. The options include immediate repair of patellar tendon with either simultaneous or delayed reconstruction of ACL...
May 2017: Journal of Orthopaedic Case Reports
Munkh-Uchral Erdenebat, Byeong-Jun Kim, Yan-Ling Piao, Seo-Yeon Park, Ki-Chul Kwon, Mei-Lan Piao, Kwan-Hee Yoo, Nam Kim
A mobile three-dimensional image acquisition and reconstruction system using a computer-generated integral imaging technique is proposed. A depth camera connected to the mobile device acquires the color and depth data of a real object simultaneously, and an elemental image array is generated based on the original three-dimensional information for the object, with lens array specifications input into the mobile device. The three-dimensional visualization of the real object is reconstructed on the mobile display through optical or digital reconstruction methods...
October 1, 2017: Applied Optics
Abir M Kabbani, Christopher V Kelly
The curvature of biological membranes at the nanometer scale is critically important for vesicle trafficking, organelle morphology, and disease propagation. The initiation of membrane bending occurs at a length scale that is irresolvable by most superresolution optical microscopy methods. Here, we report the development of polarized localization microscopy (PLM), a pointillist optical imaging technique for the detection of nanoscale membrane curvature in correlation with single-molecule dynamics and molecular sorting...
October 17, 2017: Biophysical Journal
Manuela Cesaretti, Nicolas Poté, Federica Dondero, François Cauchy, Anne Sophie Schneck, Olivier Soubrane, Valerie Paradis, Alberto Diaspro, Andrea Antonini
Light microscopy is an essential tool in histological examination of tissue samples. However, the required equipment for a correct and rapid diagnosis is sometimes unavailable. Smartphones and mobile phone networks are widespread, and could be used for diagnostic imaging and telemedicine. Macrovesicular steatosis (MS) is a major risk factor for liver graft failure, and is only assessable by microscopic examination of a frozen tissue section. The aim of this study was to compare the microscopic assessment of MS in liver allograft biopsies by a smartphone with eyepiece adaptor (BLIPS device) to standard light microscopy...
October 17, 2017: Microscopy Research and Technique
Chris Hawes, Pengwei Wang, Verena Kriechbaumer
The ER is a highly dynamic network of tubules and membrane sheets. Hence imaging this organelle in its native and mobile state is of great importance. Here we describe methods of labeling the native ER using fluorescent proteins and lipid dyes as well as methods for immunolabeling on plant tissue.
2018: Methods in Molecular Biology
Chia-Wei Chen, Chi-Wai Chow, Yang Liu, Chien-Hung Yeh
Recently even the low-end mobile-phones are equipped with a high-resolution complementary-metal-oxide-semiconductor (CMOS) image sensor. This motivates using a CMOS image sensor for visible light communication (VLC). Here we propose and demonstrate an efficient demodulation scheme to synchronize and demodulate the rolling shutter pattern in image sensor based VLC. The implementation algorithm is discussed. The bit-error-rate (BER) performance and processing latency are evaluated and compared with other thresholding schemes...
October 2, 2017: Optics Express
J M Olivot
The ischemic penumbra is a transient and potentially reversible condition. Therefore, infarct progression and its counterpart penumbral salvage are highly variable and result from the interaction of 3 major factors: collateral flow, revascularization delay and success. Multimodal brain imaging now offers in clinical practice an exhaustive characterization of the acute ischemic injury: vessel site occlusion, infarction/critical hypoperfusion volume, and collateral flow. From 1995 to 2015, IV alteplase administered within 4...
October 13, 2017: Revue Neurologique
Allison Yau, Ross J Harder, Matthew W Kanan, Andrew Ulvestad
Defects such as dislocations and grain boundaries often control the properties of polycrystalline materials. In nanocrystalline materials, investigating this structure-function relationship while preserving the sample remains challenging because of the short length scales and buried interfaces involved. Here we use Bragg coherent diffractive imaging to investigate the role of structural inhomogeneity on the hydriding phase transformation dynamics of individual Pd grains in polycrystalline films in three-dimensional detail...
October 16, 2017: ACS Nano
Maryam Banaei, Javad Hatami, Abbas Yazdanfar, Klaus Gramann
Neuroarchitecture uses neuroscientific tools to better understand architectural design and its impact on human perception and subjective experience. The form or shape of the built environment is fundamental to architectural design, but not many studies have shown the impact of different forms on the inhabitants' emotions. This study investigated the neurophysiological correlates of different interior forms on the perceivers' affective state and the accompanying brain activity. To understand the impact of naturalistic three-dimensional (3D) architectural forms, it is essential to perceive forms from different perspectives...
2017: Frontiers in Human Neuroscience
Serge Tisseron
The 'Pocket films empathy' activity is aimed at young people at risk of dropping out of school and those in crisis, often struggling to interact and show empathy with others. It provides support led by street educators trained in the use of the mobile telephone as a tool for talking and creating. By inviting them to put images and words to their emotions and compare their points of view, it enables these young people to express their anger, to escape from the fascination for sectarian ideas and to start to create their own personal history as well as their history within their family and society as a whole...
October 2017: Soins; la Revue de Référence Infirmière
Samuel David Keyes, Konstantinos C Zygalakis, Tiina Roose
The rhizosphere is a zone of fundamental importance for understanding the dynamics of nutrient acquisition by plant roots. The canonical difficulty of experimentally investigating the rhizosphere led long ago to the adoption of mathematical models, the most sophisticated of which now incorporate explicit representations of root hairs and rhizosphere soil. Mathematical upscaling regimes, such as homogenisation, offer the possibility of incorporating into larger-scale models the important mechanistic processes occurring at the rhizosphere scale...
October 13, 2017: Bulletin of Mathematical Biology
Jeremy H-S Wang, Kang-Fu Qiu, Paul C-P Chao
This study presents design, digital implementation and performance validation of a lead-lag controller for a 2-degree-of-freedom (DOF) translational optical image stabilizer (OIS) installed with a digital image sensor in mobile camera phones. Nowadays, OIS is an important feature of modern commercial mobile camera phones, which aims to mechanically reduce the image blur caused by hand shaking while shooting photos. The OIS developed in this study is able to move the imaging lens by actuating its voice coil motors (VCMs) at the required speed to the position that significantly compensates for imaging blurs by hand shaking...
October 13, 2017: Sensors
Simon Potier, Mindaugas Mitkus, Francesco Bonadonna, Olivier Duriez, Pierre-François Isard, Thomas Dulaurent, Marielle Mentek, Almut Kelber
Birds with larger eyes are predicted to have higher spatial resolution because of their larger retinal image. Raptors are well known for their acute vision, mediated by their deep central fovea. Because foraging strategies may demand specific visual adaptations, eye size and fovea may differ between species with different foraging ecology. We tested whether predators (actively hunting mobile prey) and carrion eaters (eating dead prey) from the order Accipitriformes differ in eye size, foveal depth, and retinal thickness using spectral domain optical coherence tomography and comparative phylogenetic methods...
October 12, 2017: Brain, Behavior and Evolution
Marc A Childress
There are a variety of causes of neck pain, including trauma and degenerative changes. The history of onset helps to direct evaluation, including the need for imaging or ancillary testing. Patterns of pain, weakness, and other specific physical examination findings also aid in diagnosis. Management of most soft tissue injuries involves early mobilization, whereas fractures are managed based on patterns of instability. Acute spinal cord injury requires emergent care, to include possible decompressive surgery...
October 2017: FP Essentials
Cecilia Gelfi, Daniele Capitanio
Two-dimensional difference gel electrophoresis (2-D DIGE) is an advanced and elegant gel electrophoretic analytical tool for comparative protein assessment. It is based on two-dimensional gel electrophoresis (2-DE) separation of fluorescently labeled protein extracts. The tagging procedures are designed to not interfere with the chemical properties of proteins with respect to their pI and electrophoretic mobility, once a proper labeling protocol is followed. The two-dye or three-dye systems can be adopted and their choice depends on specific applications...
2018: Methods in Molecular Biology
Kyung-Sang Cho, Keun Heo, Chan-Wook Baik, Jun Young Choi, Heejeong Jeong, Sungwoo Hwang, Sang Yeol Lee
We report color-selective photodetection from intermediate, monolayered, quantum dots buried in between amorphous-oxide semiconductors. The proposed active channel in phototransistors is a hybrid configuration of oxide-quantum dot-oxide layers, where the gate-tunable electrical property of silicon-doped, indium-zinc-oxide layers is incorporated with the color-selective properties of quantum dots. A remarkably high detectivity (8.1 × 10(13) Jones) is obtained, along with three major findings: fast charge separation in monolayered quantum dots; efficient charge transport through high-mobility oxide layers (20 cm(2) V(-1) s(-1)); and gate-tunable drain-current modulation...
October 10, 2017: Nature Communications
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