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https://www.readbyqxmd.com/read/29457873/the-impact-of-video-nasal-endoscopy-on-patient-satisfaction
#1
Vidur Bhalla, D David Beahm, Kevin J Sykes, Kavindu K Ndeti, Alexander G Chiu
BACKGROUND: Video nasal endoscopy has significant associated expense for practices, but its use has been justified by the benefit it provides to the examiner. No study has examined the perceived benefit to the patient. In this study, the impact of video endoscopy on patient satisfaction is evaluated. METHODS: A prospective, randomized, single-blinded study was performed on new patients receiving care in the rhinology clinics of a tertiary-care center. Patients were randomized into the standard endoscopic examination (SEE) or video endoscopic examination (VEE) groups...
February 19, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29457722/spatially-and-temporally-resolved-detection-of-arsenic-in-a-capillary-dbd-by-hydride-generation-high-resolved-optical-emission-spectrometry
#2
Sebastian Burhenn, Jan Kratzer, Milan Svoboda, Felix David Klute, Antje Michels, Damir Veza, Joachim Franzke
A new method for arsenic detection by optical emission spectrometry (OES) is presented. Arsine (AsH3) is generated from liquid solutions by means of hydride generation (HG) and introduced into a capillary dielectric barrier discharge (DBD) where it is atomized and excited. A great challenge in OES is the reduction of the recorded background signal because it negatively affects the limit of detection (LOD). In conventional DBD-OES methods the signal intensity of the line of interest, in this case arsenic, is integrated over a long timescale...
February 19, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29457703/exploration-of-assistive-technology-for-uniform-laparoscopic-surgery
#3
Masakazu Sato, Minako Koizumi, Takahiro Hino, Yu Takahashi, Natsuki Nagashima, Nao Itaoka, Chiharu Ueshima, Maki Nakata, Yoko Hasumi
INTRODUCTION: Laparoscopic surgery is less invasive than open surgery and is now common in various medical fields. However, laparoscopic surgery is more difficult than open surgery and often requires additional time for the operator to achieve mastery. Therefore, we investigated the use of assistive technology for uniform laparoscopic surgery. METHODS: We used the OpenCV2 library for augmented reality with an ArUco marker to detect and estimate forceps positioning...
February 19, 2018: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/29457337/a-novel-rotational-matrix-and-translation-vector-algorithm-geometric-accuracy-for-augmented-reality-in-oral-and-maxillofacial-surgeries
#4
Yahini Prabha Murugesan, Abeer Alsadoon, Paul Manoranjan, P W C Prasad
BACKGROUND: Augmented reality-based surgeries have not been successfully implemented in oral and maxillofacial areas due to limitations in geometric accuracy and image registration. This paper aims to improve the accuracy and depth perception of the augmented video. METHODOLOGY: The proposed system consists of a rotational matrix and translation vector algorithm to reduce the geometric error and improve the depth perception by including 2 stereo cameras and a translucent mirror in the operating room...
February 19, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29456705/discrimination-of-malignant-transformation-from-benign-endometriosis-using-a-near-infrared-approach
#5
Naoki Kawahara, Yuki Yamada, Fuminori Ito, Wataru Hojo, Takuya Iwabuchi, Hiroshi Kobayashi
The aim of the present single-center retrospective study was to investigate the discrimination of malignant transformation from ovarian endometrioma (OE) using a near-infrared approach ex vivo . Cystic fluid samples were collected from patients with OE (n=34) and endometriosis-associated ovarian cancer (EAOC) (n=12). The light reflected from each sample of cystic fluid [change in luminance, Δl (cd/m2 ) = background luminance-cystic fluid luminance at 800 nm] was spectrally measured by a near-infrared CCD camera with band-path filter (800 nm)...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29455281/sensitive-colorimetric-assay-for-uric-acid-and-glucose-detection-based-on-multilayer-modified-paper-with-smartphone-as-signal-readout
#6
Xu Wang, Fang Li, Ziqi Cai, Kaifan Liu, Jing Li, Boyang Zhang, Jianbo He
In this work, a multilayer-modified paper-based colorimetric sensing platform with improved color uniformity and intensity was developed for the sensitive and selective determination of uric acid and glucose with smartphone as signal readout. In detail, chitosan, different kinds of chromogenic reagents, and horseradish peroxidase (HRP) combined with a specific oxidase, e.g., uricase or glucose oxidase (GOD), were immoblized onto the paper substrate to form a multilayer-modified test paper. Hydrogen peroxide produced by the oxidases (uricase or GOD) reacts with the substrates (uric acid or glucose), and could oxidize the co-immoblized chromogenic reagents to form colored products with HRP as catalyst...
February 17, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29454975/prefrontal-cortex-activation-during-obstacle-negotiation-what-s-the-effect-size-and-timing
#7
Inbal Maidan, Shiran Shustak, Topaz Sharon, Hagar Bernad-Elazari, Nimrod Geffen, Nir Giladi, Jeffrey M Hausdorff, Anat Mirelman
BACKGROUND: Obstacle negotiation is a daily activity that requires the integration of sensorimotor and cognitive information. Recent studies provide evidence for the important role of prefrontal cortex during obstacle negotiation. We aimed to explore the effects of obstacle height and available response time on prefrontal activation. METHODS: Twenty healthy young adults (age: 30.1 ± 1.0 years; 50% women) walked in an obstacle course while negotiating anticipated and unanticipated obstacles at heights of 50 mm and 100 mm...
February 15, 2018: Brain and Cognition
https://www.readbyqxmd.com/read/29454328/cap-preserving-smile-enhancement-surgery
#8
Ahmed N Sedky, Sherine S Wahba, Maged M Roshdy, Nermeen R Ayaad
BACKGROUND: Different enhancement procedures have been suggested for reduction of residual refractive errors after SMILE. The aim of this study is to evaluate an improved cap-preserving technique for enhancement after SMILE (Re-SMILE). METHODS: A retrospective case series was conducted at Eye subspecialty center, Cairo, Egypt on 9 eyes with myopia or myopic astigmatism (spherical equivalent - 8.0 and - 12.0D). undergoing SMILE procedure and needed second interference...
February 17, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29453459/ultrahigh-resolution-radiation-imaging-system-using-an-optical-fiber-structure-scintillator-plate
#9
Seiichi Yamamoto, Kei Kamada, Akira Yoshikawa
High resolution imaging of radiation is required for such radioisotope distribution measurements as alpha particle detection in nuclear facilities or high energy physics experiments. For this purpose, we developed an ultrahigh resolution radiation imaging system using an optical fiber structure scintillator plate. We used a ~1-μm diameter fiber structured GdAlO 3 :Ce (GAP) /α-Al 2 O 3 scintillator plate to reduce the light spread. The fiber structured scintillator plate was optically coupled to a tapered optical fiber plate to magnify the image and combined with a lens-based high sensitivity CCD camera...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453008/forensic-image-analysis-cctv-distortion-and-artefacts
#10
REVIEW
Dilan Seckiner, Xanthé Mallett, Claude Roux, Didier Meuwly, Philip Maynard
As a result of the worldwide deployment of surveillance cameras, authorities have gained a powerful tool that captures footage of activities of people in public areas. Surveillance cameras allow continuous monitoring of the area and allow footage to be obtained for later use, if a criminal or other act of interest occurs. Following this, a forensic practitioner, or expert witness can be required to analyse the footage of the Person of Interest. The examination ultimately aims at evaluating the strength of evidence at source and activity levels...
February 6, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29452908/gait-and-posture-analysis-in-patients-with-maxillary-transverse-discrepancy-before-and-after-rpe
#11
Martina Mason, Fabiola Spolaor, Annamaria Guiotto, Alberto De Stefani, Antonio Gracco, Zimi Sawacha
AIM: The purpose of this study was to evaluate the effects of the rapid palatal expansion (RPE) on posture and gait analysis in subjects with maxillary transverse discrepancies. MATERIAL AND METHODS: Forty-one patients between 6 and 12 years were divided into 3 groups: 10 control subjects (Cs), 16 patients with unilateral posterior crossbite (CbMono), 15 patients with maxillary transverse discrepancy and no crossbite (Nocb). Every subject underwent gait analysis and posturographic examination in order to evaluate the presence of balance alterations before (T0) and after (T4) RPE application...
February 13, 2018: International Orthodontics
https://www.readbyqxmd.com/read/29451130/intrinsic-optical-signal-imaging-of-the-blood-volume-changes-is-sufficient-for-mapping-the-resting-state-functional-connectivity-in-the-rodent-cortex
#12
Sreekanth Kura, Hongyu Xie, Buyin Fu, Cenk Ayata, David A Boas, Sava Sakadzic
OBJECTIVE: Resting state functional connectivity (RSFC) allows the study of functional organization in normal and diseased brain by measuring the spontaneous brain activity generated under resting conditions. Intrinsic optical signal imaging (IOSI) based on multiple illumination wavelengths has been used successfully to compute RSFC maps in animal studies. The IOSI setup complexity would be greatly reduced if only a single wavelength can be used to obtain comparable RSFC maps. APPROACH: We used anesthetized mice and performed various comparisons between the RSFC maps based on single wavelength as well as oxy-, deoxy- and total hemoglobin concentration changes...
February 16, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29450545/use-of-the-posterior-anterior-corneal-curvature-radii-ratio-to-improve-the-accuracy-of-intraocular-lens-power-calculation-eom-s-adjustment-method
#13
Mingue Kim, Youngsub Eom, Hwa Lee, Young-Woo Suh, Jong Suk Song, Hyo Myung Kim
Purpose: To evaluate the accuracy of IOL power calculation using adjusted corneal power according to the posterior/anterior corneal curvature radii ratio. Methods: Nine hundred twenty-eight eyes from 928 reference subjects and 158 eyes from 158 cataract patients who underwent phacoemulsification surgery were enrolled. Adjusted corneal power of cataract patients was calculated using the fictitious refractive index that was obtained from the geometric mean posterior/anterior corneal curvature radii ratio of reference subjects and adjusted anterior and predicted posterior corneal curvature radii from conventional keratometry (K) using the posterior/anterior corneal curvature radii ratio...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29449507/rewritable-multi-event-analog-recording-in-bacterial-and-mammalian-cells
#14
Weixin Tang, David R Liu
We present two CRISPR-mediated analog multi-event recording apparatus (CAMERA) systems that use base editors and Cas9 nucleases to record cellular events in bacteria and mammalian cells. The devices record signal amplitude or duration as changes in the ratio of mutually exclusive DNA sequences (CAMERA 1), or as single-base modifications (CAMERA 2). We achieved recording of multiple stimuli in bacteria or mammalian cells, including exposure to antibiotics, nutrients, viruses, light, and changes in Wnt signaling...
February 15, 2018: Science
https://www.readbyqxmd.com/read/29449471/-camera-records-cell-action-with-new-crispr-tricks
#15
Jon Cohen
No abstract text is available yet for this article.
February 16, 2018: Science
https://www.readbyqxmd.com/read/29448864/development-of-a-novel-6-dof-parallel-mechanism-moving-platform-for-investigating-the-effects-of-multimodal-sensory-feedback-information-regarding-postural-stability-in-humans
#16
Shuta Sato, Motoki Takagi, Tasuku Miyoshi
The purpose of this study was to develop a six-degree-of-freedom parallel mechanism moving platform to investigate the effects of multimodal sensory feedback information while standing upright. We constructed a custom-designed disturbance-applying instrument (DAI) consisting of a support surface suspended from eight pneumatic artificial muscles. The posture of the support surface was controlled with a proportional-integral-derivative (PID) feedback system using an infra-red camera-based real-time 3D motion capture system, and was estimated by step and frequency responses...
February 15, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29448809/utilizing-machine-learning-and-automated-performance-metrics-to-evaluate-robot-assisted-radical-prostatectomy-performance-and-predict-outcomes
#17
Andrew Hung, Jian Chen, Zhengping Che, Tanachat Nilanon, Anthony Jarc, Micha Titus, Paul Oh, Inderbir Singh Gill, Yan Liu
Purpose Surgical performance is critical for clinical outcomes. We present a novel machine learning (ML) method of processing automated performance metrics (APMs) to evaluate surgical performance and predict clinical outcomes after robot-assisted radical prostatectomy (RARP). Methods We trained three ML algorithms utilizing APMs directly from robot system data (training material) and hospital length of stay (LOS; training label) (≤2 days and >2days) from 78 RARP cases, and selected the algorithm with the best performance...
February 16, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29448018/applications-of-gray-level-variation-detection-method-to-intracellular-ice-formation
#18
Yabo Wang, Kai Zhu, Xiaochuan Zhang, Hongwei Ji
Intracellular ice formation (IIF) is the major cause of death in cells subjected to freezing. The occurrence of intracellular ice prevents the penetration of light into the camera and makes the image dark. Therefore, the gray-level variation can reflect the IIF. However, cell deformation is accompanied with IIF, especially for larger cells. It is necessary to account this entire phenomenon together in a single method. In this paper, the normalized parameter C defined by the gray-level variation depending on the displacement was defined to reflect the gray-level change of each pixel point in the region of interest of the image...
February 12, 2018: Cryobiology
https://www.readbyqxmd.com/read/29447363/noise-reduction-in-ccd-measurements-by-improving-the-quality-of-dark-reference-images
#19
Tobias Heil, Gordon J Tatlock
This publication is a systematic investigation of the effect the improvement of dark-reference images has on the resulting bright-field images. For this, data were acquired with three different charge-coupled device cameras attached to two different transmission electron microscopes. Multi-frame acquisitions and methods to correct x-ray noise are introduced and quantified as options to improve the dark-reference images. Furthermore, the influence of x-ray noise on transmission electron microscopy measurements is discussed and observations on its composition are shared...
February 13, 2018: Microscopy
https://www.readbyqxmd.com/read/29446784/clinical-comparison-between-an-opaque-and-a-clear-pit-and-fissures-sealants-a-12-month-split-mouth-randomized-controlled-study
#20
G M Nardi, M Mazur, D Corridore, M Capocci, F Md Rinaldo, A Maruotti, L Ottolenghi, F Guerra
TRIAL DESIGN: We design a clinical splith-mouth, randomized controlled study, in which the retention of an opaque and clear pit and fissures sealants were evaluated and their effectiveness compared at 6 and 12 months of follow up. A secondary aim was to evaluate the possibility of using a fluorescence based intra-oral camera through the clear sealant to monitor enamel demineralization. METHODS: Consecutive young adolescents with at least two molars with code 0, 1, 2 caries evidenced following the International Caries Detection and Assessment System (ICDAS II) were enrolled...
January 2018: La Clinica Terapeutica
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