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https://www.readbyqxmd.com/read/28643046/clinical-evaluation-of-the-efficacy-and-safety-of-combined-bipolar-radiofrequency-and-optical-energies-vs-optical-energy-alone-for-the-treatment-of-aging-hands
#1
Ines Verner, Tuvia Dror Kutscher
Different treatment modalities are used for the treatment and esthetic improvement of aging hands. This study evaluated the efficacy and safety of a novel technology, which combines bipolar radio frequency (RF) and optical energies for the cosmetic treatment of aging hands. The objective of the study was to assess the efficacy, safety, tolerability, and patient satisfaction of combined bipolar radiofrequency and optical energies vs. optical energy alone for the treatment of aging hands. Thirteen female patients with solar lentigines on the back of the hands were enrolled...
June 23, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28628684/megasessions-efficacy-of-fewer-longer-treatment-sessions-for-fat-reduction-in-noninvasive-body-contouring-using-a-radiofrequency-based-device
#2
Diane Duncan
<p>While the field of noninvasive body contouring is booming, many patients still note a lesser result than they might achieve with a single session of liposuction or dermolipectomy. The duration of a noninvasive fat reduction treatment series can be daunting. Patients have questioned the worth of these procedures when the expected benefit is modest and the time they devote to the project is significant. An eight-patient mini-study was performed to see if two or three "megasessions" could be substituted for eight weekly sessions of bipolar radiofrequency based fat reduction treatments...
May 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28626095/-role-of-the-autophagy-in-the-treatment-of-neuropathic-pain-with-pulsed-radiofrequency
#3
Lin Yang, Liang Guo, Junmei Xu, Yaping Wang, Dingquan Zou, Xinghua Jiang
To detect the effect of pulse radiofrequency (PRF) treatment on the neuropathic pain established by L5-spinal nerve ligation (SNL) on rats, and to investigate if PRF treatment would affect the expression of autophagy related protein LC3 and autophagy related receptor P62 at the dorsal horn.
 Methods: A total of 36 male Sprague-Dawley rats were randomly divided into 3 groups: a Sham group, a SNL group, and a SNL+PRF group. The 50% paw withdrawal mechanical threshold (PWMT) was detected at 1 day before and 1, 3, 7, 14 and 28 days post-operation by using Von-Frey filaments...
May 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28615985/treatment-of-movement-disorders-with-focused-ultrasound
#4
REVIEW
Paul S Fishman, Victor Frenkel
Although the use of ultrasound as a potential therapeutic modality in the brain has been under study for several decades, relatively few neuroscientists or neurologists are familiar with this technology. Stereotactic brain lesioning had been widely used as a treatment for medically refractory patients with essential tremor (ET), Parkinson disease (PD), and dystonia but has been largely replaced by deep brain stimulation (DBS) surgery, with advantages both in safety and efficacy. However, DBS is associated with complications including intracerebral hemorrhage, infection, and hardware malfunction...
2017: Journal of Central Nervous System Disease
https://www.readbyqxmd.com/read/28612040/double-shot-mev-electron-diffraction-and-microscopy
#5
P Musumeci, D Cesar, J Maxson
In this paper, we study by numerical simulations a time-resolved MeV electron scattering mode where two consecutive electron pulses are used to capture the evolution of a material sample on 10 ps time scales. The two electron pulses are generated by illuminating a photocathode in a radiofrequency photogun by two short laser pulses with adjustable delay. A streak camera/deflecting cavity is used after the sample to project the two electron bunches on two well separated regions of the detector screen. By using sufficiently short pulses, the 2D spatial information from each snapshot can be preserved...
July 2017: Structural Dynamics (Melville, N.Y.)
https://www.readbyqxmd.com/read/28595852/three-dimensional-model-based-segmentation-in-echocardiography-using-high-temporal-tissue-and-blood-flow-information
#6
Inge H Gerrits, Maartje M Nillesen, Livia Kapusta, Johan M Thijssen, Chris L de Korte
Accurate 3-D surface segmentation is a challenging task in echocardiography because of the relatively low image quality. We introduce a new method for 3-D segmentation of the endocardium involving temporal decorrelation of echo signals originating from tissue and blood using radiofrequency (RF) signals acquired in 3-D Doppler mode. Temporal features were extracted in 3-D Doppler mode, where a sequence of RF lines is recorded for each image line. Each set of RF lines is highly correlated because of the high pulse repetition frequency...
June 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28580695/non-contrast-enhanced-peripheral-mr-angiography-using-velocity-selective-excitation
#7
Dongchan Kim, Hyunseok Seo, Jaejin Cho, Kinam Kwon, Yeji Han, HyunWook Park
PURPOSE: To develop a new non-contrast-enhanced peripheral MR angiography that provides a high contrast angiogram without using electrocardiography triggering and saturation radiofrequency pulses. METHODS: A velocity-selective excitation technique is used in conjunction with the golden-angle radial sampling scheme. The signal amplitude varies according to the velocity of the flow by the velocity-selective excitation technique. Because the arterial blood velocity varies depending on the cardiac phase, the acquired data can be classified into systolic and diastolic phase based on the signal amplitude of the artery...
June 5, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28580367/improving-temporal-resolution-of-ultrafast-electron-diffraction-by-eliminating-arrival-time-jitter-induced-by-radiofrequency-bunch-compression-cavities
#8
J G H Franssen, O J Luiten
The temporal resolution of sub-relativistic ultrafast electron diffraction (UED) is generally limited by the radio frequency (RF) phase and amplitude jitter of the RF lenses that are used to compress the electron pulses. We theoretically show how to circumvent this limitation by using a combination of several RF compression cavities. We show that if powered by the same RF source and with a proper choice of RF field strengths, RF phases, and distances between the cavities, the combined arrival time jitter due to RF phase jitter of the cavities is cancelled at the compression point...
July 2017: Structural Dynamics (Melville, N.Y.)
https://www.readbyqxmd.com/read/28578480/acute-neuroinflammation-promotes-cell-responses-to-1800%C3%A2-mhz-gsm-electromagnetic-fields-in-the-rat-cerebral-cortex
#9
Julie Lameth, Annie Gervais, Catherine Colin, Philippe Lévêque, Thérèse M Jay, Jean-Marc Edeline, Michel Mallat
Mobile phone communications are conveyed by radiofrequency (RF) electromagnetic fields, including pulse-modulated global system for mobile communications (GSM)-1800 MHz, whose effects on the CNS affected by pathological states remain to be specified. Here, we investigated whether a 2-h head-only exposure to GSM-1800 MHz could impact on a neuroinflammatory reaction triggered by lipopolysaccharide (LPS) in 2-week-old or adult rats. We focused on the cerebral cortex in which the specific absorption rate (SAR) of RF averaged 2...
June 3, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28578057/landmarks-in-the-historical-development-of-twenty-first-century-food-processing-technologies
#10
REVIEW
N N Misra, Mohamed Koubaa, Shahin Roohinejad, Pablo Juliano, Hami Alpas, Rita S Inácio, Jorge A Saraiva, Francisco J Barba
Over a course of centuries, various food processing technologies have been explored and implemented to provide safe, fresher-tasting and nutritive food products. Among these technologies, application of emerging food processes (e.g., cold plasma, pressurized fluids, pulsed electric fields, ohmic heating, radiofrequency electric fields, ultrasonics and megasonics, high hydrostatic pressure, high pressure homogenization, hyperbaric storage, and negative pressure cavitation extraction) have attracted much attention in the past decades...
July 2017: Food Research International
https://www.readbyqxmd.com/read/28575334/characterization-of-peripheral-and-central-sensitization-after-dorsal-root-ganglion-intervention-in-patients-with-unilateral-lumbosacral-radicular-pain-a-prospective-pilot-study
#11
V Mehta, S Snidvongs, B Ghai, R Langford, T Wodehouse
Background.: Quantitative sensory testing (QST) has been used to predict the outcome of epidural steroid injections in lumbosacral radicular pain and has the potential to be an important tool in the selection of appropriate treatment (such as epidural steroid injections vs surgery) for patients with chronic radicular pain. In addition, QST assists in identification of the pain pathways of peripheral and central sensitization in selected groups of patients. Methods.: Twenty-three patients were given dorsal root ganglion (DRG) infiltration with local anaesthesia and steroid ('DRG block'), and those who demonstrated at least 50% pain relief were offered pulsed radiofrequency (PRF) to the DRG...
June 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28562571/hemodynamic-instability-after-pulmonary-veins-isolation-in-a-patient-with-dual-chamber-pacemaker-the-phantom-injury-of-the-ventricular-lead
#12
Márcio Galindo Kiuchi, Guilherme Miglioli Lobato, Shaojie Chen
INTRODUCTION: The standard treatment of sinus node dysfunction (SND) is the pacemaker implantation, and the ideal methodology for the management of atrial fibrillation (AF) is rhythm control, but this is sometimes very hard to accomplish. For such actions, complete isolation of all pulmonary veins (PVI) is currently widely accepted as the best endpoint. CASE PRESENTATION: In this case, we report a female patient, 81 years old, with controlled hypertension, without coronary artery disease, bearer of bilateral knee replacement, and dual chamber pacemaker implanted 1...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28552957/safety-and-eeg-data-quality-of-concurrent-high-density-eeg-and-high-speed-fmri-at-3-tesla
#13
Mette Thrane Foged, Ulrich Lindberg, Kishore Vakamudi, Henrik B W Larsson, Lars H Pinborg, Troels W Kjær, Martin Fabricius, Claus Svarer, Brice Ozenne, Carsten Thomsen, Sándor Beniczky, Olaf B Paulson, Stefan Posse
PURPOSE: Concurrent EEG and fMRI is increasingly used to characterize the spatial-temporal dynamics of brain activity. However, most studies to date have been limited to conventional echo-planar imaging (EPI). There is considerable interest in integrating recently developed high-speed fMRI methods with high-density EEG to increase temporal resolution and sensitivity for task-based and resting state fMRI, and for detecting interictal spikes in epilepsy. In the present study using concurrent high-density EEG and recently developed high-speed fMRI methods, we investigate safety of radiofrequency (RF) related heating, the effect of EEG on cortical signal-to-noise ratio (SNR) in fMRI, and assess EEG data quality...
2017: PloS One
https://www.readbyqxmd.com/read/28550499/systematic-review-of-fmri-compatible-devices-design-and-testing-criteria
#14
REVIEW
V Hartwig, N Carbonaro, A Tognetti, N Vanello
Functional Magnetic Resonance Imaging (fMRI) is at present one of the most used methodologies for functional brain exploration, both in clinical and research settings. fMRI can noninvasively measure neural activity by using specific experimental paradigms. Often, these paradigms require the stimulation of the subject to perform sensorimotor tasks: in the past, the stimuli have been administered manually for investigating fundamental aspects of tactile perception and somatosensory processing. Nowadays, the use of mechatronic devices to stimulate the subject during fMRI studies is growing, also to assure reproducibility, control, and monitoring of task performances...
May 26, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28547075/comparison-of-photobiomodulation-therapy-and-suprascapular-nerve-pulsed-radiofrequency-in-chronic-shoulder-pain-a-randomized-controlled-single-blind-clinical-trial
#15
Burcu Metin Ökmen, Korgün Ökmen
Shoulder pain can be difficult to treat due to its complex anatomic structure, and different treatment methods can be used. We aimed to examine the efficacy of photobiomodulation therapy (PBMT) and suprascapular nerve (SSN)-pulsed radiofrequency (RF) therapy. In this prospective, randomized, controlled, single-blind study, 59 patients with chronic shoulder pain due to impingement syndrome received PBMT (group H) or SSN-pulsed RF therapy (group P) in addition to exercise therapy for 14 sessions over 2 weeks...
May 25, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28542010/thermal-modeling-for-the-next-generation-of-radiofrequency-exposure-limits-commentary
#16
Kenneth R Foster, Marvin C Ziskin, Quirino Balzano
This commentary evaluates two sets of guidelines for human exposure to radiofrequency (RF) energy, focusing on the frequency range above the "transition" frequency at 3-10 GHz where the guidelines change their basic restrictions from specific absorption rate to incident power density, through the end of the RF band at 300 GHz. The analysis is based on a simple thermal model based on Pennes' bioheat equation (BHTE) (Pennes 1948) assuming purely surface heating; an Appendix provides more details about the model and its range of applicability...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28541590/renal-denervation-interventional-radiofrequency-treatment-of-arterial-hypertension-two-years-follow-up
#17
Krzysztof Bartus, Jerzy Sadowski, Bogusław Kapelak, Radosław Litwinowicz, Jakub Podolec, Magdalena Bartus, Artur Dziewierz, Stanislaw Bartus, Wojciech Zajdel, Dhanunjaya Lakkireddy
BACKGROUND: Arterial hypertension is one of the most common chronic disease in the Western World, affecting more than 25% of adult population. AIM: The aim of this study was to assess changes in arterial blood pressure (BP) levels in hypertensive patients, after ablation of nerve terminals in renal arteries using radiofrequency energy during 24 months follow-up. METHODS AND RESULTS: Thirty two patients with diagnosed resistant hypertension (20 men and 12 women) underwent percutaneous catheter-based renal denervation of nerve terminals in renal arteries wall...
May 25, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28540817/effect-of-applied-voltage-duration-and-repetition-frequency-of-rf-pulses-for-pain-relief-on-temperature-spikes-and-electrical-field-a-computer-modelling-study
#18
Elżbieta Ewertowska, Borja Mercadal, Víctor Muñoz, Antoni Ivorra, Macarena Trujillo, Enrique Berjano
BACKGROUND: The thermal and electrical effects of pulsed radiofrequency (PRF) for pain relief can be controlled by modifying the characteristics of the RF pulses applied. Our goal was to evaluate the influence of such modifications on the thermal and electric performance in tissue. METHODS: A computational model was developed to compare the temperature and electric field time courses in tissue between a standard clinical protocol (45 V pulses, 20 ms duration, 2 Hz repetition frequency) and a new protocol (55 V pulses, 5 ms duration, 5 Hz repetition frequency) with a higher applied electric field but a smaller impact on temperature alterations in tissue...
May 16, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540782/computational-modelling-of-internally-cooled-wet-icw-electrodes-for-radiofrequency-ablation-impact-of-rehydration-thermal-convection-and-electrical-conductivity
#19
Macarena Trujillo, Jose Bon, Enrique Berjano
PURPOSE: (1) To analyse rehydration, thermal convection and increased electrical conductivity as the three phenomena which distinguish the performance of internally cooled electrodes (IC) and internally cooled wet (ICW) electrodes during radiofrequency ablation (RFA), (2) Implement a RFA computer model with an ICW which includes these phenomena and (3) Assess their relative influence on the thermal and electrical tissue response and on the coagulation zone size. METHODS: A 12-min RFA in liver was modelled using an ICW electrode (17 G, 3 cm tip) by an impedance-control pulsing protocol with a constant current of 1...
March 21, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28535550/high-voltage-pulsed-radiofrequency-for-the-treatment-of-refractory-neuralgia-of-the-infraorbital-nerve-a-prospective-double-blinded-randomized-controlled-study
#20
Fang Luo, Tao Wang, Ying Shen, Lan Meng, Jingjing Lu, Nan Ji
BACKGROUND: A recent study showed that 50% of patients who suffered from refractory neuralgia of the infraorbital nerve obtained satisfactory efficacy after pulsed radiofrequency (PRF) treatment. A pilot study showed that increasing the output voltage of PRF significantly improved the efficacy for trigeminal neuralgia; however, whether increasing the output voltage of PRF can improve the treatment outcomes for neuralgia of the infraorbital nerve is unknown. OBJECTIVE: To evaluate the efficacy and safety of high voltage PRF treatment in comparison with standard voltage PRF for neuralgia of the infraorbital nerve...
May 2017: Pain Physician
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