keyword
MENU ▼
Read by QxMD icon Read
search

RF pattern

keyword
https://www.readbyqxmd.com/read/28337820/selective-radiofrequency-stimulation-of-the-dorsal-root-ganglion-drg-as-a-method-for-predicting-targets-for-neuromodulation-in-patients-with-post-amputation-pain-a-case-series
#1
Corey W Hunter, Ajax Yang, Tim Davis
OBJECTIVE: While spinal cord stimulation (SCS) has established itself as an accepted and validated treatment for neuropathic pain, there are a number of conditions where it has experienced less, long-term success: post amputee pain (PAP) being one of them. Dorsal root ganglion (DRG) stimulation has shown great promise, particularly in conditions where traditional SCS has fallen short. One major difference between DRG stimulation and traditional SCS is the ability to provide focal stimulation over targeted areas...
March 23, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28336896/nanofibrous-silver-coated-polymeric-scaffolds-with-tunable-electrical-properties
#2
Adnan Memic, Musab Aldhahri, Ali Tamayol, Pooria Mostafalu, Mohamed Shaaban Abdel-Wahab, Mohamadmahdi Samandari, Kamyar Mollazadeh Moghaddam, Nasim Annabi, Sidi A Bencherif, Ali Khademhosseini
Electrospun micro- and nanofibrous poly(glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) substrates have been extensively used as scaffolds for engineered tissues due to their desirable mechanical properties and their tunable degradability. In this study, we fabricated micro/nanofibrous scaffolds from a PGS-PCL composite using a standard electrospinning approach and then coated them with silver (Ag) using a custom radio frequency (RF) sputtering method. The Ag coating formed an electrically conductive layer around the fibers and decreased the pore size...
March 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28335216/investigation-of-the-structural-electrical-and-optical-properties-of-the-nano-scale-gzo-thin-films-on-glass-and-flexible-polyimide-substrates
#3
Fang-Hsing Wang, Kun-Neng Chen, Chao-Ming Hsu, Min-Chu Liu, Cheng-Fu Yang
In this study, Ga₂O₃-doped ZnO (GZO) thin films were deposited on glass and flexible polyimide (PI) substrates at room temperature (300 K), 373 K, and 473 K by the radio frequency (RF) magnetron sputtering method. After finding the deposition rate, all the GZO thin films with a nano-scale thickness of about 150 ± 10 nm were controlled by the deposition time. X-ray diffraction patterns indicated that the GZO thin films were not amorphous and all exhibited the (002) peak, and field emission scanning electron microscopy showed that only nano-scale particles were observed...
May 10, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28316588/alterations-of-muscle-activation-pattern-in-stroke-survivors-during-obstacle-crossing
#4
Chenming Ma, Na Chen, Yurong Mao, Dongfeng Huang, Rong Song, Le Li
OBJECTIVE: This study investigates changes in the neuromuscular activation pattern of the lower limb muscles in stroke survivors when crossing obstacles of three different heights. METHODS: Eight stroke survivors and eight age-, height-, and gender-matched healthy controls were recruited and instructed to cross over obstacles with heights of 10, 20, and 30% leg length. Surface electromyography (EMG) signals were recorded from the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA), and medial gastrocnemius (MG) of both limbs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28262893/new-frontiers-for-mass-spectrometry-based-upon-structures-for-lossless-ion-manipulations
#5
Yehia M Ibrahim, Ahmed M Hamid, Liulin Deng, Sandilya V B Garimella, Ian K Webb, Erin S Baker, Richard D Smith
Structures for lossless ion manipulations (SLIM) provide a new paradigm for efficient, complex and extended gas phase ion manipulations. SLIM are created from electric fields generated by the application of DC and RF potentials to arrays of electrodes patterned on two parallel surfaces. The electric fields provide lossless ion manipulations, including effective ion transport and storage. SLIM modules have been developed using both constant and oscillatory electric fields (e.g. traveling waves) to affect the ion motion...
March 6, 2017: Analyst
https://www.readbyqxmd.com/read/28258971/an-image-processing-strategy-to-extract-important-information-suitable-for-a-low-size-stimulus-pattern-in-a-retinal-prosthesis
#6
Yili Chen, Jixiang Fu, Dawei Chu, Rongmao Li, Yaoqin Xie
BACKGROUND: A retinal prosthesis is designed to help the blind to obtain some sight. It consists of an external part and an internal part. The external part is made up of a camera, an image processor and an RF transmitter. The internal part is made up of an RF receiver, implant chip and microelectrode. METHODS: Currently, the number of microelectrodes is in the hundreds, and we do not know the mechanism for using an electrode to stimulate the optic nerve. A simple hypothesis is that the pixels in an image correspond to the electrode...
March 4, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28256158/treatment-outcomes-and-patterns-of-radiologic-appearance-after-hypofractionated-image-guided-radiotherapy-delivered-with-helical-tomotherapy-hht-for-lung-tumours
#7
Stefano Arcangeli, Lorenzo Falcinelli, Stefano Bracci, Alessandro Greco, Alessia Monaco, Jessica Dognini, Cinzia Chiostrini, Rita Bellavita, Cynthia Aristei, Vittorio Donato
OBJECTIVE: To evaluate treatment outcomes and patterns of CT lung injury after hypofractionated image-guided radiotherapy delivered with helical tomotherapy (HHT) in a series of inoperable lung lesions. METHODS: 68 patients who were medically inoperable (69 lesions) without evidence of viable extrathoracic disease were included. Dose prescription was driven by tumour location (hilar/pericentral vs peripheral) and/or target volume. 52% of the lesions received a biological equivalent dose (BED10) ≥100 Gy...
March 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28255335/the-clinical-characteristics-of-sarcoid-arthropathy-based-on-a-prospective-cohort-study
#8
Senol Kobak, Fidan Sever, Ozan Usluer, Tuncay Goksel, Mehmet Orman
BACKGROUND: Sarcoidosis is known as a Th1-mediated disease, which can mimic many primary rheumatologic diseases or sometimes co-exist with them. Clinical characteristics of sarcoid arthropathy are not well described and the studies reported in the literature so far are mostly based on data from referrals. The aim of this study was to evaluate the incidence and clinical characteristics of sarcoid arthropathy. METHODS: All our patients were prospectively evaluated in our rheumatology outpatient center from 2011 to 2015...
December 2016: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28223989/ufgt-the-key-enzyme-associated-with-the-petals-variegation-in-japanese-apricot
#9
Xinxin Wu, Qinghua Gong, Xiaopeng Ni, Yong Zhou, Zhihong Gao
Japanese apricot (Prunus mume Sieb.et Zucc.) is an important ornamental plant in China. One of the traits of petals color variegation is attractive, but its formation mechanism is unclear. In our study, RNA-seq technology was employed to characterize the transcriptome response to the mutation of "Fuban Tiaozhi" associated with petals variegation in Japanese apricot. As a result, 4,579,040 (white-flowered, WF) and 7,269,883 (red-flowered, RF) reads were mapped to P. persica genes, while 5,006,676 (WF) and 7,907,436 (RF) were mapped to P...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28205333/longitudinal-study-of-clinical-prognostic-factors-in-patients-with-early-rheumatoid-arthritis-the-predict-study
#10
Paul Bird, Dave Nicholls, Rina Barrett, Julien de Jager, Hedley Griffiths, Lynden Roberts, Kathleen Tymms, Philip McCloud, Geoffrey Littlejohn
AIM: To assess the association between baseline clinical prognostic factors and subsequent Disease Activity Score of 28 joints (DAS28) remission in early rheumatoid arthritis (RA). METHODS: Data were collected using point of care clinical software from participating rheumatology centres. Patients aged 18 years or over whose date of clinical onset of RA was within the previous 12-24 months, who had at least 6 months of follow-up data and a DAS28-ESR (erythrocyte sedimentation rate) score recorded between 12 and 24 months from first being seen for RA were included...
February 16, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28203122/evaluation-of-the-effect-of-radiofrequency-radiation-emitted-from-wi-fi-router-and-mobile-phone-simulator-on-the-antibacterial-susceptibility-of-pathogenic-bacteria-listeria-monocytogenes-and-escherichia-coli
#11
M Taheri, S M J Mortazavi, M Moradi, S Mansouri, G R Hatam, F Nouri
Mobile phones and Wi-Fi radiofrequency radiation are among the main sources of the exposure of the general population to radiofrequency electromagnetic fields (RF-EMF). Previous studies have shown that exposure of microorganisms to RF-EMFs can be associated with a wide spectrum of changes ranged from the modified bacterial growth to the alterations of the pattern of antibiotic resistance. Our laboratory at the nonionizing department of the Ionizing and Non-ionizing Radiation Protection Research Center has performed experiments on the health effects of exposure to animal models and humans to different sources of electromagnetic fields such as cellular phones, mobile base stations, mobile phone jammers, laptop computers, radars, dentistry cavitrons, magnetic resonance imaging, and Helmholtz coils...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28197823/the-deposition-of-strontium-and-zinc-co-substituted-hydroxyapatite-coatings
#12
L Robinson, K Salma-Ancane, L Stipniece, B J Meenan, A R Boyd
The in vitro and in vivo performance of hydroxyapatite (HAp) coatings can be modified by the addition of different trace ions, such as silicon (Si), lithium (Li), magnesium (Mg), zinc (Zn) or strontium (Sr) into the HAp lattice, to more closely mirror the complex chemistry of human bone. To date, most of the work in the literature has considered single ion-substituted materials and coatings, with limited reports on co-substituted calcium phosphate systems. The aim of this study was to investigate the potential of radio frequency magnetron sputtering to deposit Sr and Zn co-substituted HAp coatings using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS)...
March 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28191607/retrospective-study-of-the-clinical-characteristics-and-risk-factors-of-rheumatoid-arthritis-associated-interstitial-lung-disease
#13
Yongfeng Zhang, Hongbin Li, Nawei Wu, Xin Dong, Yi Zheng
This study aims to explore the clinical characteristics and risk factors of rheumatoid arthritis (RA)-associated interstitial lung disease (ILD). This is a retrospective study of 550 patients with RA. All patients underwent chest high-resolution computed tomography (HRCT) scanning. (1) Two hundred thirty-seven out of five hundred fifty (43.1%) patients with RA were diagnose with ILD. 13.5% ILD occurred before RA onset, 69.6% ILD occurred within 10 years of RA onset, and 16.9% ILD occurred more than 10 years after RA onset...
February 12, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28129184/multi-polarization-reconfigurable-antenna-for-wireless-biomedical-system
#14
Hang Wong, Wei Lin, Laure Huitema, Eric Arnaud
This paper presents a multi-polarization reconfigurable antenna with four dipole radiators for biomedical applications in body-centric wireless communication system (BWCS). The proposed multi-dipole antenna with switchable 0°, +45°, 90° and -45° linear polarizations is able to overcome the polarization mismatching and multi-path distortion in complex wireless channels as in BWCS. To realize this reconfigurable feature for the first time among all the reported antenna designs, we assembled four dipoles together with 45° rotated sequential arrangements...
January 23, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28121998/rheumatic-heart-disease-and-myxomatous-degeneration-differences-and-similarities-of-valve-damage-resulting-from-autoimmune-reactions-and-matrix-disorganization
#15
Carlo de Oliveira Martins, Lea Demarchi, Frederico Moraes Ferreira, Pablo Maria Alberto Pomerantzeff, Carlos Brandao, Roney Orismar Sampaio, Guilherme Sobreira Spina, Jorge Kalil, Edecio Cunha-Neto, Luiza Guilherme
Autoimmune inflammatory reactions leading to rheumatic fever (RF) and rheumatic heart disease (RHD) result from untreated Streptococcus pyogenes throat infections in individuals who exhibit genetic susceptibility. Immune effector mechanisms have been described that lead to heart tissue damage culminating in mitral and aortic valve dysfunctions. In myxomatous valve degeneration (MXD), the mitral valve is also damaged due to non-inflammatory mechanisms. Both diseases are characterized by structural valve disarray and a previous proteomic analysis of them has disclosed a distinct profile of matrix/structural proteins differentially expressed...
2017: PloS One
https://www.readbyqxmd.com/read/28113068/symptoms-and-the-use-of-wireless-communication-devices-a-prospective-cohort-study-in-swiss-adolescents
#16
Anna Schoeni, Katharina Roser, Martin Röösli
BACKGROUND: We investigated whether radiofrequency electromagnetic fields (RF-EMF) from mobile phones and other wireless devices or by the wireless device use itself due to non-radiation related factors in that context are associated with an increase in health symptom reports of adolescents in Central Switzerland. METHODS: In a prospective cohort study, 439 study participants (participation rate: 36.8%) aged 12-17 years, completed questionnaires about their mobile and cordless phone use, their self-reported symptoms and possible confounding factors at baseline (2012/2013) and one year later (2013/2014)...
April 2017: Environmental Research
https://www.readbyqxmd.com/read/28046877/th-ef-bra-06-a-novel-retrospective-3d-k-space-sorting-4d-mri-technique-using-a-radial-k-space-acquisition-mri-sequence
#17
Y Liu, E Subashi, F Yin, J Cai
PURPOSE: Current retrospective 4D-MRI provides superior tumor-to-tissue contrast and accurate respiratory motion information for radiotherapy motion management. The developed 4D-MRI techniques based on 2D-MRI image sorting require a high frame-rate of the MR sequences. However, several MRI sequences provide excellent image quality but have low frame-rate. This study aims at developing a novel retrospective 3D k-space sorting 4D-MRI technique using radial k-space acquisition MRI sequences to improve 4D-MRI image quality and temporal-resolution for imaging irregular organ/tumor respiratory motion...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046655/su-f-t-169-a-periodic-quality-assurance-program-for-a-spot-scanning-proton-treatment-facility
#18
D Mundy, E Tryggestad, C Beltran, K Furutani, G Gilson, S Ito, J Johnson, J Kruse, N Remmes, A Tasson, T Whitaker, M Herman
PURPOSE: To develop daily and monthly quality assurance (QA) programs in support of a new spot-scanning proton treatment facility using a combination of commercial and custom equipment and software. Emphasis was placed on efficiency and evaluation of key quality parameters. METHODS: The daily QA program was developed to test output, spot size and position, proton beam energy, and image guidance using the Sun Nuclear Corporation rf-DQA™3 device and Atlas QA software...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28030898/early-hypopharyngeal-cancer-treated-with-different-therapeutic-approaches-a-single-institution-cohort-analysis
#19
Nalee Kim, Jeongshim Lee, Kyung Hwan Kim, Jong Won Park, Chang Geol Lee, Ki Chang Keum
PURPOSE: Early hypopharyngeal squamous cell carcinoma (HPSCC) is a rarely diagnosed disease, for which the optimal treatment has not been defined yet. We assessed patterns of failure and outcomes in early HPSCC treated with various therapeutic approaches to identify its optimal treatment. MATERIALS AND METHODS: Thirty-six patients with stage I (n = 10) and II (n = 26) treated between January 1992 and March 2014 were reviewed. Patients received definitive radiotherapy (RT) (R group, n = 10), surgery only (S group, n = 19), or postoperative RT (PORT group, n = 7)...
December 2016: Radiation Oncology Journal
https://www.readbyqxmd.com/read/28019022/use-of-pattern-recognition-for-unaliasing-simultaneously-acquired-slices-in-simultaneous-multislice-mr-fingerprinting
#20
Yun Jiang, Dan Ma, Himanshu Bhat, Huihui Ye, Stephen F Cauley, Lawrence L Wald, Kawin Setsompop, Mark A Griswold
PURPOSE: The purpose of this study is to accelerate an MR fingerprinting (MRF) acquisition by using a simultaneous multislice method. METHODS: A multiband radiofrequency (RF) pulse was designed to excite two slices with different flip angles and phases. The signals of two slices were driven to be as orthogonal as possible. The mixed and undersampled MRF signal was matched to two dictionaries to retrieve T1 and T2 maps of each slice. Quantitative results from the proposed method were validated with the gold-standard spin echo methods in a phantom...
December 26, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
keyword
keyword
31541
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"