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https://www.readbyqxmd.com/read/28227376/electrocardiogram-reconstruction-from-high-resolution-voltage-optical-mapping
#1
Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton, Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton, Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton
Electrocardiogram recordings during opucal mapping experiments in heart tissue are commonly used tu monitor the health of the preparation and to obtain dominant frequencies during arrhythmic and defibrillatory studies. However the use of ECG reconstructed from optical mapping is seldom used and to date it has not been strictly validated. In this manuscript we present the first detailed validation and comparison of Optical Mapping ECG, or OM-ECG, with standard ECG recordings by calculating the electrostatic potential in space as a function of the voltage measured optically and describe the different approximations that can be used to obtain unipolar or bipolar ECG recordings...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227246/multiple-switching-light-sources-based-motion-artifacts-reduction-in-reflectance-photoplethysmography
#2
Hooseok Lee, Hoon Ko, Tharoeun Thap, Jinseok Lee, Hooseok Lee, Hoon Ko, Tharoeun Thap, Jinseok Lee, Tharoeun Thap, Hoon Ko, Jinseok Lee, Hooseok Lee
We proposed a technique to eliminate motion artifacts by subtracting the two green signals with different light intensity from single green LED. We used green LED light source with a photodetector to obtain the PPG signals from the wrist. We showed that the signal subtraction with different light intensity from the same light source reduced motion artifacts, and the clean PPG signal was remained. Performance comparison was carried out in five different scenarios: stationary state, fingers movement, gripping, up-down vertically bending and left-right horizontally swinging conditions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226837/a-preliminary-evaluation-of-myoelectrical-energy-distribution-of-the-front-neck-muscles-in-pharyngeal-phase-during-normal-swallowing
#3
Mingxing Zhu, Wanzhang Yang, Oluwarotimi Williams Samuel, Yun Xiang, Jianping Huang, Haiqing Zou, Guanglin Li, Mingxing Zhu, Wanzhang Yang, Oluwarotimi Williams Samuel, Yun Xiang, Jianping Huang, Haiqing Zou, Guanglin Li, Wanzhang Yang, Yun Xiang, Guanglin Li, Haiqing Zou, Jianping Huang, Oluwarotimi Williams Samuel, Mingxing Zhu
Pharyngeal phase is a central hub of swallowing in which food bolus pass through from the oral cavity to the esophageal. Proper understanding of the muscular activities in the pharyngeal phase is useful for assessing swallowing function and the occurrence of dysphagia in humans. In this study, high-density (HD) surface electromyography (sEMG) was used to study the muscular activities in the pharyngeal phase during swallowing tasks involving three healthy male subjects. The root mean square (RMS) of the HD sEMG data was computed by using a series of segmented windows as myoelectrical energy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224401/synchronous-bilateral-breast-cancer-irradiation-clinical-and-dosimetrical-issues-using-volumetric-modulated-arc-therapy-and-simultaneous-integrated-boost
#4
Alba Fiorentino, Rosario Mazzola, Stefania Naccarato, Niccolò Giaj-Levra, Sergio Fersino, Gianluisa Sicignano, Umberto Tebano, Francesco Ricchetti, Ruggero Ruggieri, Filippo Alongi
OBJECTIVES: The aim of the present retrospective analysis was to evaluate dosimetric parameters, feasibility and outcome for Synchronous Bilateral Breast Cancer (SBBC) patients treated with adjuvant radiotherapy (RT) by Volumetric Modulated Arc Therapy (VMAT). METHODS: From September 2011 to April 2016, 1100 Breast Cancer (BC) patients were referred to our institution to receive adjuvant breast RT, and those with SBBC were selected for the present analysis. A total of 16 patients were identified...
February 21, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28218381/an-accurate-method-to-quantify-breathing-induced-prostate-motion-for-patients-implanted-with-electromagnetic-transponders
#5
Tommaso Giandini, Costanza M V Panaino, Barbara Avuzzi, Sara Morlino, Sergio Villa, Nice Bedini, Gabriele Carabelli, Sarah C Frasca, Anna Romanyukha, Anatoly Rosenfeld, Emanuele Pignoli, Riccardo Valdagni, Mauro Carrara
PURPOSE: To validate and apply a method for the quantification of breathing-induced prostate motion (BIPM) for patients treated with radiotherapy and implanted with electromagnetic transponders for prostate localization and tracking. METHODS: For the analysis of electromagnetic transponder signal, dedicated software was developed and validated with a programmable breathing simulator phantom. The software was then applied to 1,132 radiotherapy fractions of 30 patients treated in supine position, and to a further 61 fractions of 2 patients treated in prone position...
February 11, 2017: Tumori
https://www.readbyqxmd.com/read/28214286/-partial-delegation-to-radiation-therapists-of-the-control-by-cone-beam-ct-of-prostate-positioning
#6
C Benhaïm, G Loos, J L Achard, L Berger, C Caillé, T Frédéric-Moreau, J Biau, M Lapeyre
PURPOSE: Intensity modulated radiotherapy for prostate cancer involves daily monitoring of the positioning of the prostate, possible with cone beam CT (CBCT). It allows increased accuracy compared to readjustments but induces an increase in the time dedicated to these medical checks. The aim of the study was to evaluate the possibility of delegation of this task to the radiation therapists by comparing their readjustments to the doctors. PATIENTS AND METHODS: Five consecutive patients treated with radiation for prostate cancer (76Gy) were analysed...
February 14, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28213464/cilia-in-left-right-symmetry-breaking
#7
Kyosuke Shinohara, Hiroshi Hamada
Visceral organs of vertebrates show left-right (L-R) asymmetry with regard to their position and morphology. Cilia play essential role in generating L-R asymmetry. A number of genes required for L-R asymmetry have now been identified in vertebrates, including human, many of which contribute to the formation and motility of cilia. In the mouse embryo, breaking of L-R symmetry occurs in the ventral node, where two types of cilia (motile and immotile) are present. Motile cilia are located at the central region of the node, and generate a leftward fluid flow...
February 17, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28203207/morphotype-dependent-flow-characteristics-in-bicuspid-aortic-valve-ascending-aortas-a-benchtop-particle-image-velocimetry-study
#8
Andrew McNally, Ashish Madan, Philippe Sucosky
The bicuspid aortic valve (BAV) is a major risk factor for secondary aortopathy such as aortic dilation. The heterogeneous BAV morphotypes [left-right-coronary cusp fusion (LR), right-non-coronary cusp fusion (RN), and left-non-coronary cusp fusion (LN)] are associated with different dilation patterns, suggesting a role for hemodynamics in BAV aortopathogenesis. However, assessment of this theory is still hampered by the limited knowledge of the hemodynamic abnormalities generated by the distinct BAV morphotypes...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28203027/-a-new-method-to-orthodontically-correct-dental-occlusal-plane-canting-wave-shaped-arch
#9
X Zheng, X X Hu, N Ma, X H Chen
OBJECTIVE: To introduce a technique of second order wave-shaped arch wire to orthodontically treat dental occlusal plane canting (DOPC) with left-right interactive anchorage, and to test its clinical efficacy. METHODS: Among the permanent dentition malocclusion patients who showed no obvious facial asymmetry, we screened for patients who showed anterior occlusal plane canting (AOPC) after routine orthodontic examination, treatment planning, MBT fixed appliance installation and serial arch wires alignment...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28199914/controlling-attention-to-gaze-and-arrows-in-attention-deficit-hyperactivity-disorder
#10
Andrea Marotta, Augusto Pasini, Erica Menotti, Alessia Pasquini, Maria Bernarda Pitzianti, Maria Casagrande
The aim of this research was to assess implicit processing of social and non-social distracting cues in children with ADHD. Young people with ADHD and matched controls were asked to classify target words (LEFT/RIGHT) which were accompanied by a distracter eye-gaze or arrow. Typically developing participants showed evidence of interference effects from both eye-gaze and arrow distracters. In contrast, the ADHD group showed evidence of interference effects from arrow but failed to show interference from eye-gaze...
February 9, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28199505/influence-of-left-right-asymmetries-on-voice-quality-in-simulated-paramedian-vocal-fold-paralysis
#11
Robin A Samlan, Brad H Story
Purpose: The purpose of this study was to determine the vocal fold structural and vibratory symmetries that are important to vocal function and voice quality in a simulated paramedian vocal fold paralysis. Method: A computational kinematic speech production model was used to simulate an exemplar "voice" on the basis of asymmetric settings of parameters controlling glottal configuration. These parameters were then altered individually to determine their effect on maximum flow declination rate, spectral slope, cepstral peak prominence, harmonics-to-noise ratio, and perceived voice quality...
February 1, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28199400/estimating-the-location-of-baleen-whale-calls-using-dual-streamers-to-support-mitigation-procedures-in-seismic-reflection-surveys
#12
Shima H Abadi, Maya Tolstoy, William S D Wilcock
In order to mitigate against possible impacts of seismic surveys on baleen whales it is important to know as much as possible about the presence of whales within the vicinity of seismic operations. This study expands on previous work that analyzes single seismic streamer data to locate nearby calling baleen whales with a grid search method that utilizes the propagation angles and relative arrival times of received signals along the streamer. Three dimensional seismic reflection surveys use multiple towed hydrophone arrays for imaging the structure beneath the seafloor, providing an opportunity to significantly improve the uncertainty associated with streamer-generated call locations...
2017: PloS One
https://www.readbyqxmd.com/read/28196860/the-nclx-type-na-ca-2-exchanger-ncx-9-is-required-for-patterning-of-neural-circuits-in-caenorhabditis-elegans
#13
Vishal Sharma, Soumitra Roy, Israel Sekler, Damien M O'Halloran
NCLX is a Na(+)/Ca(2+) exchanger that uses energy stored in the transmembrane sodium gradient to facilitate the exchange of sodium ions for ionic calcium. Mammals have a single NCLX, which has been shown to function primarily at the mitochondrion and is an important regulator of neuronal physiology by contributing to neurotransmission and synaptic plasticity. The role of NCLX in developmental cell patterning, for example, in neural circuits, is largely unknown. Here we describe a novel role for the Caenorhabditis elegans NCLX-type protein, NCX-9, in neural circuit formation...
February 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28190730/leftward-flow-determines-laterality-in-conjoined-twins
#14
Matthias Tisler, Thomas Thumberger, Isabelle Schneider, Axel Schweickert, Martin Blum
Conjoined twins fused at the thorax display an enigmatic left-right defect: although left twins are normal, laterality is disturbed in one-half of right twins [1-3]. Molecularly, this randomization corresponds to a lack of asymmetric Nodal cascade induction in right twins [4]. We studied leftward flow [5, 6] at the left-right organizer (LRO) [7, 8] in thoracopagus twins in Xenopus, which displayed a duplicated, fused, and ciliated LRO. Cilia were motile and produced a leftward flow from the right LRO margin of the right to the left margin of the left twin...
February 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28188591/shell-fluctuating-asymmetry-in-the-sea-dwelling-benthic-bivalve-mytilus-galloprovincialis-lamarck-1819-as-morphological-markers-to-detect-environmental-chemical-contamination
#15
Massimiliano Scalici, Lorenzo Traversetti, Federica Spani, Valentina Malafoglia, Monica Colamartino, Tiziana Persichini, Simone Cappello, Giuseppe Mancini, Giulia Guerriero, Marco Colasanti
Investigations on asymmetries showed that deviations from perfect bilateral symmetry are interpreted as environmental changes inducing developmental instability. Since morphological abnormalities increase with pollution, deformations may be considered indicators of the organism exposition to pollution. Therefore, the onset of asymmetry in otherwise normally symmetrical traits has been used as a measure of some stresses as well. In this context, we studied how marine pollution affects the valve morphological alterations in the mussel Mytilus galloprovincialis...
February 10, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28187043/difficulty-of-laparoscopic-liver-resection-proposal-for-a-new-classification
#16
Yoshikuni Kawaguchi, David Fuks, Norihiro Kokudo, Brice Gayet
OBJECTIVE: We propose an objective and practical classification system to predict difficulty of different laparoscopic liver resections (LLRs). BACKGROUND: Surgical difficulty is highly subjective and is not influenced only by surgical factors. Consequently, few series have described the degree of difficulty of LLR or attempted to objectively assess the surgical difficulty. METHODS: From a prospectively maintained database between 1995 and 2015, patients undergoing LLR without simultaneous procedures were selected, and LLR procedures were divided into 3 groups according to scores based on operative time (< or ≥190 minutes), blood loss (< or ≥100 mL), and conversion rate (< or ≥4...
February 9, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28182636/mechanism-for-generation-of-left-isomerism-in-ccdc40-mutant-embryos
#17
Kelsey F Sugrue, Irene E Zohn
Leftward fluid flow in the mouse node is generated by cilia and is critical for initiating asymmetry of the left-right axis. Coiled-coil domain containing-40 (Ccdc40) plays an evolutionarily conserved role in the assembly of motile cilia and establishment of the left-right axis. Approximately one-third of Ccdc40lnks mutant embryos display situs defects and here we investigate the underlying mechanism. Ccdc40lnks mutants show delayed induction of markers of the left-lateral plate mesoderm (L-LPM) including Lefty1, Lefty2 and Nodal...
2017: PloS One
https://www.readbyqxmd.com/read/28177589/the-evolution-of-amniote-gastrulation-the-blastopore-primitive-streak-transition
#18
REVIEW
Matthew J Stower, Federica Bertocchini
In the animal kingdom, gastrulation, the process by which the primary germ layers are formed involves a dramatic transformation in the topology of the cells that give rise to all of the tissues of the adult. Initially formed as a mono-layer, this tissue, the epiblast, becomes subdivided through the internalization of cells, thereby forming a two (bi-laminar) or three (tri-laminar) layered embryo. This morphogenetic process coordinates the development of the fundamental body plan and the three-body axes (antero-posterior, dorso-ventral, and left-right) and begins a fundamental segregation of cells toward divergent developmental fates...
February 8, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28171777/the-development-of-a-shoulder-specific-left-right-judgement-task-validity-reliability
#19
John D Breckenridge, James H McAuley, David S Butler, Halton Stewart, G Lorimer Moseley, Karen A Ginn
BACKGROUND: Disruption of cortically-held working body schema has been associated with a variety of pain conditions. A motor imagery technique - the left right judgement task (LRJT) - has been used as an indirect assessment of the integrity of the working body schema. To date there is no LRJT specifically designed to investigate the body schema of persons with shoulder pain. OBJECTIVES: To develop a shoulder specific LRJT and assess its validity and reliability...
January 27, 2017: Musculoskelet Sci Pract
https://www.readbyqxmd.com/read/28163453/reduction-of-blister-formation-time-in-suction-blister-epidermal-grafting-in-vitiligo-patients-using-a-household-hair-dryer
#20
Shweta Arora, Bikash Ranjan Kar
BACKGROUND: Suction blister epidermal grafting (SBEG) is a simple and effective way of surgical repigmentation in vitiligo. The major problem faced is the time taken for the formation of blisters. Temperature at the suction site is one of the factors affecting the blister formation time. AIMS AND OBJECTIVES: To reduce the blister formation time in SBEG by increasing the surface temperature to 44°C. MATERIALS AND METHODS: This is a left-right comparison study...
October 2016: Journal of Cutaneous and Aesthetic Surgery
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