نتایج جستجو برای: radiofrequency rf

تعداد نتایج: 49059  

Journal: :Anticancer research 2007
V Quaranta G Manenti F Bolacchi E Cossu C A Pistolese O C Buonomo L Carotenuto C Piconi G Simonetti

BACKGROUND Radio-frequency ablation (RFA) has recently received much attention as an effective minimally invasive strategy for the local treatment of tumors. The purpose of this study was to evaluate the efficacy of single-needle cool-tip RF breast ablation in terms of temperature distribution and duration of the procedure as compared to multiprobe RF breast ablation. MATERIALS AND METHODS Tw...

2012
Daniela Platano Costanza Burattini Pietro Mesirca Entelë Gavoçi Alessandra Paffi Francesca Apollonio Micaela Liberti Ferdinando Bersani Giorgio Aicardi

We are studying non-thermal effects of continuous wave (2 W/kg) and GSM-modulated (2 or 4 W/kg) 900 MHz radiofrequency (RF) electromagnetic field exposure on synaptic transmission and plasticity in rat perirhinal cortex slices. Preliminary results, still under elaboration, indicate that the exposure to both RF signals may cause small changes in synaptic plasticity in our experimental conditions.

Journal: :Applied neurophysiology 1983
E R Cosman B S Nashold P Bedenbaugh

The physical principles of radiofrequency (RF) lesion making in stereotactic neurosurgery are summarized. Empirical data are given on the relationship between lesion size and lesioning parameters. Currently accepted ranges of lesioning parameters for selected stereotactic procedures are discussed. Advanced RF lesion electrode designs are described which improve the capabilities to reach and con...

A. Ikinci Keles, C. Guven, E. Odaci, E. Taskin, F.M. Gur, H. Kaya, H.E. Gur, H.S. Erol, M.B. Halici, S. Timurkaan,

Background: Mobile phones as an electronic device which are emitting radiofrequency-electromagnetic field (RF-EMF). In this study was intend to determine the contingent effects of cell phone induced RF-EMF on testicular tissue in adolescence. Materials and Methods: Rats in the RF-EMF group were exposed to 900 MHz RF-EMF, while sham and control rats were not. After the completion of the test ste...

Journal: :Journal of drugs in dermatology : JDD 2007
Flor A Mayoral

Monopolar radiofrequency (RF) devices are well established treatment modalities for tightening facial skin. A 60-year-old woman presented with a desire to tighten the lax skin and improve the appearance of both upper arms. A combination unipolar and bipolar RF device may provide volume reduction as well as skin tightening in the upper arm.

Journal: :Medical engineering & physics 2013
Nathalie C Fouquet Malcolm B Hawken Paul Elliott Adrian P Burgess

We observed an anomaly in the human electroencephalogram (EEG) associated with exposure to terrestrial trunked radio (TETRA) Radiofrequency Fields (RF). Here, we characterize the time and frequency components of the anomaly and demonstrate that it is an artefact caused by TETRA RF interfering with the EEG recording equipment and not by any direct or indirect effect on the brain.

2013
Ali Akbar Mohammadi Seyed Morteza Seyed Jafari Ahmad Abdollahi

Male circumcision, one of the oldest and most frequent operations performed all over the world, removes 33–50% of the penile skin. Like each surgical procedure, circumcision can leads to complications ranging from the insignificant to the tragic. Circumcision methods can be done with different ways. The radiofrequency (RF) scalpel, an innovative instrument, can be used in circumcision. Here, we...

2017
Robert E Jacobson Ovidiu Palea Michelle Granville

Radiofrequency facet ablation (RFA) has been performed using the same technique for over 50 years. Except for variations in electrode size, tip shape, and change in radiofrequency (RF) stimulation parameters, using standard, pulsed, and cooled RF wavelengths, the target points have remained absolutely unchanged from the original work describing RFA for lumbar pain control. Degenerative changes ...

A Rafati A Soleimani, A Talebi M Haghani S M J Mortazavi, S Rahimi

Introduction: The fast-growing telecommunication and wireless technologies has led to more dependence to these communication devices and higher levels of exposure to electromagnetic radiations propagated by cellular devices and their service towers. To disable signaling in places where silence is valued or where information quarantine measures are required, mobile phone jammers emit radiofreque...

Adel Zalata Ayman Z El-Samanoudy Dalia Shaalan Taymour Mostafa, Youssef El-Baiomy

Background Use of cellular phones emitting radiofrequency electromagnetic field (RF-EMF) has been increased exponentially and become a part of everyday life. This study aimed to investigate the effects of in vitro RF-EMF exposure emitted from cellular phones on sperm motility index, sperm DNA fragmentation and seminal clusterin (CLU) gene expression. MaterialsAndMethods In this prospective stud...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید