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https://www.readbyqxmd.com/read/29330341/biomechanics-of-coupled-motion-in-the-cervical-spine-during-simulated-whiplash-in-patients-with-pre-existing-cervical-or-lumbar-spinal-fusion-a-finite-element-study
#1
H Huang, R W Nightingale, A B C Dang
OBJECTIVES: Loss of motion following spine segment fusion results in increased strain in the adjacent motion segments. However, to date, studies on the biomechanics of the cervical spine have not assessed the role of coupled motions in the lumbar spine. Accordingly, we investigated the biomechanics of the cervical spine following cervical fusion and lumbar fusion during simulated whiplash using a whole-human finite element (FE) model to simulate coupled motions of the spine. METHODS: A previously validated FE model of the human body in the driver-occupant position was used to investigate cervical hyperextension injury...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29306525/cricoarytenoid-joint-ankylosis-classification-and-transoral-laser-microsurgical-treatment
#2
Ihab Atallah, Manjunath Mk, Ahmad Al Omari, Christian Adrien Righini, Paul F Castellanos
OBJECTIVE: This study aimed to describe a graduated approach for effective transoral mobilization of cricoarytenoid joint ankylosis (CJA) in the context of the Bogdasarian system of classifying posterior glottic web-based stenosis (PGWS). STUDY DESIGN: This is a retrospective cohort study through data from medical records and operative notes. A consecutive series of 23 patients who underwent reconstructive transoral laser microsurgery for PGWS with a significant degree of CJA (Bogdasarian grade III-IV) was included in the study...
January 4, 2018: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29304908/incisal-preparation-design-for-ceramic-veneers-a-critical-review
#3
Sy Yin Chai, Vincent Bennani, John M Aarts, Karl Lyons
BACKGROUND: The authors reviewed and identified the evidence for the various incisal preparation designs for ceramic veneers. TYPES OF STUDIES REVIEWED: The authors searched MEDLINE with PubMed and Ovid to identify any articles in the English language related to the topic up through March 2017 using a combination of key words: "porcelain veneer or ceramic veneer or dental veneer or labial veneer" AND "preparation," NOT "composite veneer," NOT "crown," NOT "implant," NOT "fixed partial denture or bridge or denture," NOT "porcelain-fused-to-metal," NOT "marginal gap or fit...
January 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29288387/a-novel-group-fused-sparse-partial-correlation-method-for-simultaneous-estimation-of-functional-networks-in-group-comparison-studies
#4
Xiaoyun Liang, David N Vaughan, Alan Connelly, Fernando Calamante
The conventional way to estimate functional networks is primarily based on Pearson correlation along with classic Fisher Z test. In general, networks are usually calculated at the individual-level and subsequently aggregated to obtain group-level networks. However, such estimated networks are inevitably affected by the inherent large inter-subject variability. A joint graphical model with Stability Selection (JGMSS) method was recently shown to effectively reduce inter-subject variability, mainly caused by confounding variations, by simultaneously estimating individual-level networks from a group...
December 29, 2017: Brain Topography
https://www.readbyqxmd.com/read/29287095/probabilistic-inversion-of-expert-assessments-to-inform-projections-about-antarctic-ice-sheet-responses
#5
Robert William Fuller, Tony E Wong, Klaus Keller
The response of the Antarctic ice sheet (AIS) to changing global temperatures is a key component of sea-level projections. Current projections of the AIS contribution to sea-level changes are deeply uncertain. This deep uncertainty stems, in part, from (i) the inability of current models to fully resolve key processes and scales, (ii) the relatively sparse available data, and (iii) divergent expert assessments. One promising approach to characterizing the deep uncertainty stemming from divergent expert assessments is to combine expert assessments, observations, and simple models by coupling probabilistic inversion and Bayesian inversion...
2017: PloS One
https://www.readbyqxmd.com/read/29250134/image-fusion-of-ct-and-mr-with-sparse-representation-in-nsst-domain
#6
Chenhui Qiu, Yuanyuan Wang, Huan Zhang, Shunren Xia
Multimodal image fusion techniques can integrate the information from different medical images to get an informative image that is more suitable for joint diagnosis, preoperative planning, intraoperative guidance, and interventional treatment. Fusing images of CT and different MR modalities are studied in this paper. Firstly, the CT and MR images are both transformed to nonsubsampled shearlet transform (NSST) domain. So the low-frequency components and high-frequency components are obtained. Then the high-frequency components are merged using the absolute-maximum rule, while the low-frequency components are merged by a sparse representation- (SR-) based approach...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/29242789/giant-cell-tumor-of-metacarpal-in-the-skeletally-immature-patient-and-free-osteoarticular-metatarsal-transfer-review-of-literature-with-case-report
#7
Pankaj Kumar Mishra, Yash Agarwal, Prakhar Singhal, Kripa Shankar Mishra
Introduction: In the customary wisdom, it is conceded that giant-cell tumor (GCT) is a pathology of fused epiphysis, but there are literatures available to depict that even though rare bit, but it occurs in the skeletally immature patients. Here, we are presenting a rare case of GCT of the fifth metacarpal in the skeletally immature patient. Case Report: It is a case report of a 13-year-old girl with the history of swelling over her right hand for 5 months. X-ray revealed that there was an osteolytic fusiform expansible lesion...
September 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29241157/allergenicity-of-recombinant-humulus-japonicus-pollen-allergen-1-after-combined-exposure-to-ozone-and-nitrogen-dioxide
#8
Qiang Hong, Shumin Zhou, Hui Zhao, Jiaxian Peng, Yang Li, Yu Shang, Minghong Wu, Wei Zhang, Senlin Lu, Shuijun Li, Shen Yu, Weiqian Wang, Qingyue Wang
Ozone (O3) and nitrogen dioxide (NO2) are thought to play primary roles in aggravating air pollution-induced health problems. However, the effects of joint O3/NO2 on the allergenicity of pollen allergens are unclear. Humulus japonicus pollen allergen 1 (Hum j1) is a profilin protein that causes widespread pollinosis in eastern Asia. In order to study the effects of combined O3/NO2 on the allergenicity of Hum j1, tandem six-histidine peptide tag (His6)-fused recombinant Hum j1 (rHum j1) was expressed in a prokaryotic system and purified through His6 affinity chromatography...
December 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29232832/hybrid-orientation-based-human-limbs-motion-tracking-method
#9
Grzegorz Glonek, Adam Wojciechowski
One of the key technologies that lays behind the human-machine interaction and human motion diagnosis is the limbs motion tracking. To make the limbs tracking efficient, it must be able to estimate a precise and unambiguous position of each tracked human joint and resulting body part pose. In recent years, body pose estimation became very popular and broadly available for home users because of easy access to cheap tracking devices. Their robustness can be improved by different tracking modes data fusion. The paper defines the novel approach-orientation based data fusion-instead of dominating in literature position based approach, for two classes of tracking devices: depth sensors (i...
December 9, 2017: Sensors
https://www.readbyqxmd.com/read/29202986/arthrodesis-of-the-first-metatarsophalangeal-joint-a-biomechanical-comparison-of-four-fixation-techniques
#10
Ella Harris, Paul Moroney, Yves Tourné
BACKGROUND: Arthrodesis of the first metatarsophalangeal joint is a commonly performed orthopaedic procedure. The optimum method of fixation and joint surface preparation has yet to be determined. METHODS: This study compared four fixation techniques: Biomechanical grade sawbones were used. The dorsal plate used was a titanium, anatomically contoured locked plate. Testing was performed using an Instron machine applying force from the plantar aspect of the fused joint...
December 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29188661/automatic-classification-of-retinal-three-dimensional-optical-coherence-tomography-images-using-principal-component-analysis-network-with-composite-kernels
#11
Leyuan Fang, Chong Wang, Shutao Li, Jun Yan, Xiangdong Chen, Hossein Rabbani
We present an automatic method, termed as the principal component analysis network with composite kernel (PCANet-CK), for the classification of three-dimensional (3-D) retinal optical coherence tomography (OCT) images. Specifically, the proposed PCANet-CK method first utilizes the PCANet to automatically learn features from each B-scan of the 3-D retinal OCT images. Then, multiple kernels are separately applied to a set of very important features of the B-scans and these kernels are fused together, which can jointly exploit the correlations among features of the 3-D OCT images...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29163021/schizophrenia-shows-disrupted-links-between-brain-volume-and-dynamic-functional-connectivity
#12
Anees Abrol, Barnaly Rashid, Srinivas Rachakonda, Eswar Damaraju, Vince D Calhoun
Studies featuring multimodal neuroimaging data fusion for understanding brain function and structure, or disease characterization, leverage the partial information available in each of the modalities to reveal data variations not exhibited through the independent analyses. Similar to other complex syndromes, the characteristic brain abnormalities in schizophrenia may be better understood with the help of the additional information conveyed by leveraging an advanced modeling method involving multiple modalities...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29144073/evaluation-of-certain-food-additives
#13
(no author information available yet)
This report represents the conclusions of a Joint FAO/WHO Expert Committee convened to evaluate the safety of various food additives, including flavouring agents, with a view to concluding as to safety concerns and to preparing specifications for identity and purity. The first part of the report contains a general discussion of the principles governing the toxicological evaluation of and assessment of dietary exposure to food additives, including flavouring agents. A summary follows of the Committee’s evaluations of technical, toxicological and dietary exposure data for 10 food additives (Allura Red AC; carob bean gum; lutein esters from Tagetes erecta; octenyl succinic acid (OSA)– modified gum arabic; pectin; Quinoline Yellow; rosemary extract; steviol glycosides; tartrazine; and xanthan gum) and five groups of flavouring agents (alicyclic, alicyclic-fused and aromatic-fused ring lactones; aliphatic and aromatic amines and amides; aliphatic secondary alcohols, ketones and related esters; cinnamyl alcohol and related substances; and tetrahydrofuran and furanone derivatives)...
2017: World Health Organization Technical Report Series
https://www.readbyqxmd.com/read/29126037/radiographic-evaluation-of-first-mtp-joint-arthrodesis-for-severe-hallux-valgus-does-the-introduction-of-a-lag-screw-improve-union-rates-and-correction-of-the-intermetatarsal-angle
#14
Zachariah Pinter, Parke Hudson, Brent Cone, Girish Motwani, Krishna Prasad, Ashish Shah
BACKGROUND: First metatarsophalangeal (MTP-1) joint fusion is a reliable method for the correction of various deformities including hallux valgus and hallux rigidus. Ideal constructs provide high rates of fusion in desired alignment. The present study examines the union rates, as well as the change in dorsiflexion angle during the follow up period in patients who underwent MTP-1 fusion with a dorsal locking plate and a lag screw, versus patients fused with a dorsal locking plate alone...
December 2017: Foot
https://www.readbyqxmd.com/read/29081630/estimation-of-clean-and-centered-brain-network-atlases-using-diffusive-shrinking-graphs-with-application-to-developing-brains
#15
Islem Rekik, Gang Li, Weili Lin, Dinggang Shen
Many methods have been developed to spatially normalize a population of brain images for estimating a mean image as a population-average atlas. However, methods for deriving a network atlas from a set of brain networks sitting on a complex manifold are still absent. Learning how to average brain networks across subjects constitutes a key step in creating a reliable mean representation of a population of brain networks, which can be used to spot abnormal deviations from the healthy network atlas. In this work, we propose a novel network atlas estimation framework, which guarantees that the produced network atlas is clean (for tuning down noisy measurements) and well-centered (for being optimally close to all subjects and representing the individual traits of each subject in the population)...
June 2017: Information Processing in Medical Imaging: Proceedings of the ... Conference
https://www.readbyqxmd.com/read/29060261/fusing-motion-capture-and-inertial-measurements-for-improved-joint-state-recovery-an-application-for-sit-to-stand-actions
#16
Robert Peter Matthew, Sarah Seko, Ruzena Bajcsy
The estimate of joint angles, velocities, and accelerations is a key component of biomechanical modelling. The literature presents a variety of sensing modalities and algorithms to recover the full joint state, with tuning parameters varying between different applications, actions, and limbs. Comparisons between these methods are frequently limited to angles only, without comparison between the joint velocities and accelerations. This paper introduces an algorithm to fuse motion-capture and inertial measurements to recover the full state during a sit-to-stand task...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29047366/the-use-of-cinacalcet-hinders-the-diagnosis-of-parathyroid-carcinoma-in-a-chronic-dialysis-patient-a-case-report
#17
Daisuke Takada, Tatsuo Tsukamoto, Miho Fuse, Shinpei Kada, Motoko Yanagita
BACKGROUND: Secondary hyperparathyroidism (SHPT) is a common complication in patients receiving chronic dialysis therapy. Although cinacalcet can control parathyroid function and bone turnover, preventing ectopic calcification remains challenging. Cinacalcet can also suppress PTH secretion due to parathyroid carcinoma in the same way as it does for parathyroid hyperplasia in the uremic condition. We present a case of parathyroid carcinoma partially controlled by cinacalcet, in which tumorous calcinosis was successfully resolved by total parathyroidectomy...
October 18, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29030223/3d-printed-multi-compartment-capsular-devices-for-two-pulse-oral-drug-delivery
#18
A Maroni, A Melocchi, F Parietti, A Foppoli, L Zema, A Gazzaniga
In the drug delivery area, versatile therapeutic systems intended to yield customized combinations of drugs, drug doses and release kinetics have drawn increasing attention, especially because of the advantages that personalized pharmaceutical treatments would offer. In this respect, a previously proposed capsular device able to control the release performance based on its design and composition, which could extemporaneously be filled, was improved to include multiple separate compartments so that differing active ingredients or formulations may be conveyed...
October 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29026643/mineralized-collagen-artificial-bone-repair-material-products-used-for-fusing-the-podarthral-joints-with-internal-fixation-a-case-report
#19
Nihar S Ghate, Helen Cui
In this study, we reported a case with collapse and subluxation of metatarsal-cuneiform joint, navicular-cuneiform joint with subluxed the right first metatarsophalangeal joint. The injured medial column was internally fixed with compression arthrodesis. The fusion site was firmed up with BonGold® Bone Sponge and Bone Putty. The prognosis of fused navicular-cuneiform joint and metatarsal-cuneiform joint were examined by X-ray shortly after surgical operation and followed up 2, 4, 6, 9 and 13 weeks after the surgical operation...
October 2017: Regenerative Biomaterials
https://www.readbyqxmd.com/read/28984388/educating-for-collaborative-practice-an-interpretation-of-current-achievements-and-thoughts-for-future-directions
#20
Judith Nicky Hudson, Anne Croker
CONTEXT: The Edinburgh Declaration, developed in 1998 as a pledge to alter the character of medical education to more effectively meet the needs of society, included a recommendation to increase the opportunity for joint learning between health and health-related professions, as part of the training for teamwork. This article acknowledges achievements since the Declaration in relation to this recommendation, using an umbrella term for the phenomenon, 'educating for collaborative practice', and presents a perspective framed as a series of questions to encourage reflection on future directions...
October 6, 2017: Medical Education
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