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https://www.readbyqxmd.com/read/28631204/adaptive-step-size-lms-improves-ecg-detection-during-mri-at-1-5-and-3%C3%A2-t
#1
André Guillou, Jean-Marc Sellal, Sarah Ménétré, Grégory Petitmangin, Jacques Felblinger, Laurent Bonnemains
OBJECTIVE: We describe a new real-time filter to reduce artefacts on electrocardiogram (ECG) due to magnetic field gradients during MRI. The proposed filter is a least mean square (LMS) filter able to continuously adapt its step size according to the gradient signal of the ongoing MRI acquisition. MATERIALS AND METHODS: We implemented this filter and compared it, within two databases (at 1.5 and 3 T) with over 6000 QRS complexes, to five real-time filtering strategies (no filter, low pass filter, standard LMS, and two other filters optimized within the databases: optimized LMS, and optimized Kalman filter)...
June 19, 2017: Magma
https://www.readbyqxmd.com/read/28628542/a-rare-intramedullary-spinal-cord-metastasis-from-a-retroperitoneal-leiomyosarcoma-presenting-as-a-non-traumatic-spinal-cord-injury
#2
Andrew Lamberth Parker, Terrence Pugh, Mark A Hirsch
Leiomyosarcoma (LMS) is a rare but well-recognized malignant soft tissue sarcoma of smooth muscle origin. Metastases commonly occur in the lungs, liver, kidney, brain, and bone. Cases of metastatic osseous lesions or other extradural space-occupying masses secondary to LMS leading to neurologic compromise are relatively commonplace in the literature. Conversely, cases of intramedullary spinal cord metastasis (ISCM), an unusual entity as a sequela of any cancer, are exceedingly rare as a consequence of LMS. Only 2 cases of an ISCM from LMS are currently documented in the literature, and to the best of our knowledge, no case is described in the rehabilitation literature...
July 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28625393/establishment-and-characterization-of-uterine-sarcoma-and-carcinosarcoma-patient-derived-xenograft-models
#3
Tine Cuppens, Jeroen Depreeuw, Daniela Annibali, Debby Thomas, Els Hermans, Ellen Gommé, Xuan Bich Trinh, David Debruyne, Philippe Moerman, Diether Lambrechts, Frédéric Amant
OBJECTIVE: Uterine sarcomas (US) and carcinosarcomas (CS) are rare, aggressive cancers. The lack of reliable preclinical models hampers the search for new treatment strategies and predictive biomarkers. To this end, we established and characterized US and CS patient-derived xenograft (PDX) models. METHODS: Tumor fragments of US and CS were subcutaneously implanted into immunocompromised mice. Engrafted xenograft and original tumors were compared by means of histology, immunohistochemistry, whole-genome low-coverage sequencing for copy number variations, and RNA sequencing...
June 16, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28621890/reference-data-for-babybody-plethysmographic-measurements-in-chinese-neonates-and-infants
#4
Gaoli Jiang, Albert Li, Libo Wang, Liling Qian, Yun Cao, Jianfeng Huang, Chengzhou Wan, Xiaobo Zhang
BACKGROUND AND OBJECTIVE: Population-specific pulmonary function reference data are essential to identify the nature and severity of respiratory diseases. However, there is a lack of reference data for Chinese neonates and infants. The objective of this study was to develop reference data for tidal breathing and plethysmographic measurements for Chinese subjects during the first 2 years of life. METHODS: Data of tidal breathing and plethysmography from healthy Chinese neonates (≤28 days) and infants (1-24 months) using the Jaeger MasterScreen BabyBody were collated...
June 16, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28618731/impact-of-adjuvant-treatment-on-oncologic-outcomes-in-patients-with-stage-i-leiomyosarcoma-of-the-uterus
#5
Gökhan Boyraz, Derman Başaran, M Coşkun Salman, Nejat Özgül, Kunter Yüce
BACKGROUND/AIM: This study aimed to evaluate the role of adjuvant therapy for stage I uterine leiomyosarcoma (LMS). MATERIALS AND METHODS: Clinicopathological data of cases of stage I uterine LMS from 1998 to 2015 were retrieved from the computerized database of Hacettepe University Hospital. The Kaplan-Meier method was used to estimate survival and progression-free survival, and survival differences were analyzed by log-rank test. Cox regression analysis was performed to account for the potential influence of confounding factors...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28613250/an-lms-programming-scheme-and-floating-gate-technology-enabled-trimmer-less-and-low-voltage-flame-detection-sensor
#6
Juan Carlos Iglesias-Rojas, Felipe Gomez-Castañeda, Jose Antonio Moreno-Cadenas
In this paper, a Least Mean Square (LMS) programming scheme is used to set the offset voltage of two operational amplifiers that were built using floating-gate transistors, enabling a 0.95 VRMS trimmer-less flame detection sensor. The programming scheme is capable of setting the offset voltage over a wide range of values by means of electron injection. The flame detection sensor consists of two programmable offset operational amplifiers; the first amplifier serves as a 26 μV offset voltage follower, whereas the second amplifier acts as a programmable trimmer-less voltage comparator...
June 14, 2017: Sensors
https://www.readbyqxmd.com/read/28607451/vertical-crustal-motions-across-eastern-tibet-revealed-by-topography-dependent-seismic-tomography
#7
Xinyan Zhang, Yanghua Wang, Rui Gao, Tao Xu, Zhiming Bai, Xiaobo Tian, Qiusheng Li
Using a topography-dependent tomographic scheme, the seismic velocity structure of the Eastern Tibetan Plateau, including the uplifted Longmenshan (LMS) orogenic belt, is accurately imaged in spite of the extreme topographic relief in the LMS region and thick sedimentary covers in the neighbouring Sichuan Basin. The obtained image shows a high-resolution upper crustal structure on a 500 km-long profile that is perpendicular to the LMS. The image clearly shows that the crystalline basement was uplifted within the LMS orogenic belt, and that the neighbouring Songpan-Ganzi Terrane was covered by a thick flysch belt, with evidence of near-surface thrust faults caused by convergence between Eastern Tibet and the Sichuan Basin...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28599087/growth-charts-for-australian-children-with-achondroplasia
#8
Louise Tofts, Sandeep Das, Felicity Collins, Karen L O Burton
Achondroplasia is an autosomal dominant disorder, the most common genetic cause of short stature in humans. Reference curves for head circumference, weight, height, and BMI are needed in clinical practice but none exist for the Australian population. This study aimed to produce head circumference, height, weight, and BMI reference percentile curves for Australian children and adolescents with achondroplasia. Measurements of head circumference, height and weight taken at clinical visits were retrospectively extracted from the electronic medical record...
June 9, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28595188/physical-growth-and-biological-maturation-of-children-and-adolescents-proposed-reference-curves
#9
Daniel Leite Portella, Miguel Arruda, Rossana Gómez-Campos, Giovanna Checkin Portella, Cynthia Lee Andruske, Marco A Cossio-Bolaños
BACKGROUND/AIM: The study of physical growth variables in terms of chronological age and biological maturation may provide a common reference point to reflect on the occurrence of body dimensions in and between individuals. The objectives of this study were as follows: (a) verify if the observed gender differences in the variables of physical growth by chronological age are confounded by physical maturation, (b) compare physical growth patterns with the reference of the Centers for Disease Control and Prevention (CDC)-2012, and (c) develop regional curves to assess physical growth in terms of biological maturation...
June 9, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28586305/a-combined-approach-to-generate-laboratory-reference-intervals-using-unbalanced-longitudinal-data
#10
Mandy Vogel, Toralf Kirsten, Jürgen Kratzsch, Christoph Engel, Wieland Kiess
BACKGROUND: The interpretation of individual laboratory test results requires the availability of population-based reference intervals. In children, reference interval estimation has to consider frequently the strong age-dependency. Generally, for the construction of reference intervals, a sufficiently large number of independent measurement values is required. Data selections from hospitals or cohort studies often comprise dependencies violating the independence assumption. METHODS: In this article, we propose a combination of LMS-like (mean, M; coefficient of variation, S; skewness, λ or L) and resampling methods to overcome this drawback...
June 6, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28583008/effect-of-exposure-time-particle-size-and-uptake-pathways-in-immune-cell-lysosomal-cytotoxicity-of-mussels-exposed-to-silver-nanoparticles
#11
Younes Bouallegui, Ridha Ben Younes, Faten Turki, Amine Mezni, Ridha Oueslati
Cytotoxicity evaluation of hemocytes (lysosomal membrane stability [LMS] assay) from Mytilus galloprovincialis Lamarck, exposed to a sublethal dose (100 μg/L) of two size of silver nanoparticles (AgNPs: <50 nm and <100 nm) - prior to and after inhibition of potential uptake pathways (i.e., clathrin- and caveolae-mediated endocytosis) within different times of exposure (3, 6, 12 h) - showed that there was a significant cytotoxic effect on immune cells of mussels exposed for different times to either AgNP size (p < 0...
June 6, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28579623/reference-curve-for-the-mean-uterine-artery-pulsatility-index-in-singleton-pregnancies
#12
Alexander Weichert, Andreas Hagen, Michael Tchirikov, Ilka B Fuchs, Wolfgang Henrich, Michael Entezami
INTRODUCTION: Doppler sonography of the uterine artery (UA) is done to monitor pregnancies, because the detected flow patterns are useful to draw inferences about possible disorders of trophoblast invasion. Increased resistance in the UA is associated with an increased risk of preeclampsia and/or intrauterine growth restriction (IUGR) and perinatal mortality. In the absence of standardized figures, the normal ranges of the various available reference curves sometimes differ quite substantially from one another...
May 2017: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/28573320/automated-chromatographic-laccase-mediator-system-activity-assay
#13
Nico Anders, Maximilian Schelden, Simon Roth, Antje C Spiess
To study the interaction of laccases, mediators, and substrates in laccase-mediator systems (LMS), an on-line measurement was developed using high performance anion exchange chromatography equipped with a CarboPac™ PA 100 column coupled to pulsed amperometric detection (HPAEC-PAD). The developed method was optimized for overall chromatographic run time (45 to 120 min) and automated sample drawing. As an example, the Trametes versicolor laccase induced oxidation of 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)-1,3-dihydroxypropane (adlerol) using 1-hydroxybenzotriazole (HBT) as mediator was measured and analyzed on-line...
June 2, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28571151/leiomyosarcoma-of-renal-vein-a-rare-case-report
#14
Sandeep Ojha, Ramarao Nilkanthe, Jyoti Valecha, Farah Meenai, Amit Haritwal
Leiomyosarcomas (LMS) arising from vascular channel are rare and more often arise from inferior vena cava and pulmonary arteries. Primary renal vein LMS are even rarer and occur predominantly in females with peak in fifth and sixth decade. Preoperative diagnosis is difficult because these are rare tumours and present with symptoms and radiological findings similar to Renal Cell Carcinoma (RCC). We report a case of 55-year-old female who presented with abdominal discomfort with radiology showing a renal mass with features of RCC, radical nephrectomy was done and resected tumour showed an attachment to the wall of renal vein with morphology resembling LMS...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28570276/macrophage-infiltration-and-genetic-landscape-of-undifferentiated-uterine-sarcomas
#15
Joanna Przybyl, Magdalena Kowalewska, Anna Quattrone, Barbara Dewaele, Vanessa Vanspauwen, Sushama Varma, Sujay Vennam, Aaron M Newman, Michal Swierniak, Elwira Bakuła-Zalewska, Janusz A Siedlecki, Mariusz Bidzinski, Jan Cools, Matt van de Rijn, Maria Debiec-Rychter
Endometrial stromal tumors include translocation-associated low- and high-grade endometrial stromal sarcomas (ESS) and highly malignant undifferentiated uterine sarcomas (UUS). UUS is considered a poorly defined group of aggressive tumors and is often seen as a diagnosis of exclusion after ESS and leiomyosarcoma (LMS) have been ruled out. We performed a comprehensive analysis of gene expression, copy number variation, point mutations, and immune cell infiltrates in the largest series to date of all major types of uterine sarcomas to shed light on the biology of UUS and to identify potential novel therapeutic targets...
June 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/28567027/transient-vestibulopathy-in-wallenberg-s-syndrome-pathologic-analysis
#16
Jorge C Kattah, Ali S Saber Tehrani, Sigrun Roeber, Meena Gujrati, Sarah E Bach, David E Newman Toker, Ari M Blitz, Anja K E Horn
OBJECTIVE: To report an unusual lateral medullary stroke (LMS) associated with transient unidirectional horizontal, nystagmus, and decreased horizontal vestibulo-ocular reflex (h-VOR) gain that mimicked a peripheral vestibulopathy. MRI suggested involvement of caudal medial vestibular nucleus (MVN); however, the rapid resolution of the nystagmus and improved h-VOR gain favored transient ischemia without infarction. Decreased h-VOR gain is expected with peripheral vestibular lesions within the labyrinth or superior vestibular nerve; less frequently lateral pontine strokes involving the vestibular root entry, the vestibular fascicle, or neurons within the MVN may be responsible...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28561016/light-driven-liquid-metal-nanotransformers-for-biomedical-theranostics
#17
Svetlana A Chechetka, Yue Yu, Xu Zhen, Manojit Pramanik, Kanyi Pu, Eijiro Miyako
Room temperature liquid metals (LMs) represent a class of emerging multifunctional materials with attractive novel properties. Here, we show that photopolymerized LMs present a unique nanoscale capsule structure characterized by high water dispersibility and low toxicity. We also demonstrate that the LM nanocapsule generates heat and reactive oxygen species under biologically neutral near-infrared (NIR) laser irradiation. Concomitantly, NIR laser exposure induces a transformation in LM shape, destruction of the nanocapsules, contactless controlled release of the loaded drugs, optical manipulations of a microfluidic blood vessel model and spatiotemporal targeted marking for X-ray-enhanced imaging in biological organs and a living mouse...
May 31, 2017: Nature Communications
https://www.readbyqxmd.com/read/28559866/how-do-b-learning-and-learning-patterns-influence-learning-outcomes
#18
María Consuelo Sáiz Manzanares, Raúl Marticorena Sánchez, César Ignacio García Osorio, José F Díez-Pastor
Learning Management System (LMS) platforms provide a wealth of information on the learning patterns of students. Learning Analytics (LA) techniques permit the analysis of the logs or records of the activities of both students and teachers on the on-line platform. The learning patterns differ depending on the type of Blended Learning (B-Learning). In this study, we analyse: (1) whether significant differences exist between the learning outcomes of students and their learning patterns on the platform, depending on the type of B-Learning [Replacement blend (RB) vs...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28557016/recurrence-patterns-of-retroperitoneal-leiomyosarcoma-and-impact-of-salvage-surgery
#19
Naruhiko Ikoma, Keila E Torres, Heather Y Lin, Vinod Ravi, Christina L Roland, Gary N Mann, Kelly K Hunt, Janice N Cormier, Barry W Feig
BACKGROUND: Optimal treatment strategies for retroperitoneal leiomyosarcoma (RPLMS), particularly recurrent disease, are unknown. METHODS: We searched the tumor registry at The University of Texas MD Anderson Cancer Center (MDACC) to identify patients with RPLMS treated between 1994 and 2013. RESULTS: We identified 172 patients with a diagnosis of a RPLMS. Among the 85 patients who underwent complete resection included in the survival analysis, the median overall survival (OS) was 8...
May 29, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28554916/bone-mineral-density-reference-standards-for-chinese-children-aged-3-18-cross-sectional-results-of-the-2013-2015-china-child-and-adolescent-cardiovascular-health-ccach-study
#20
Junting Liu, Liang Wang, Jinghui Sun, Gongshu Liu, Weili Yan, Bo Xi, Feng Xiong, Wenqing Ding, Guimin Huang, Steven Heymsfield, Jie Mi
OBJECTIVES: No nationwide paediatric reference standards for bone mineral density (BMD) are available in China. We aimed to provide sex-specific BMD reference values for Chinese children and adolescents (3-18 years). METHODS: Data (10 818 participants aged 3-18 years) were obtained from cross-sectional surveys of the China Child and Adolescent Cardiovascular Health in 2015, which included four municipality cities and three provinces. BMD was measured using Hologic Discovery Dual Energy X-ray Absorptiometry (DXA) scanner...
May 29, 2017: BMJ Open
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