نتایج جستجو برای: radiofrequency amplifier

تعداد نتایج: 39294  

Background: Effect of electromagnetic and radiofrequency fields on human health is not well understood, a concern is its effect on male infertility. With the increased use of modern technology, issue of protection against this fields has great importance. infertility is the problem to follow psychological - social consequences. The most common cause of infertility are: male factor, female facto...

Journal: :Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology 2001
D S Lee P Dorian E Downar M Burns E L Yeo W L Gold M Paquette W Lau D M Newman

AIMS Thromboembolic complications have been reported after radiofrequency ablation but the low incidence of overt clinical events has been a limitation to the study of factors affecting thrombogenic risk. The aim of this study was to determine whether radiofrequency ablation has a procoagulant effect and to examine variables that affect thrombio generation. METHODS AND RESULTS Thirty-seven co...

 هادی صمیمی اردستانی, , جلال مهدیزاده, , مژگان کیانی آسیابر, ,

Background: Resulting from the rough flow of air through the nose and throat during sleep, snoring can arise from transitory obstruction at various levels, rendering the sufferer feeling sleep deprived. A relatively new method using radiofrequency technology, called palatoplasty (somnoplasty), can be used to reduce the size of obstructive tissues in the nose and throat. In this study, we assess...

Journal: :iranian journal of public health 0
seyed mohammad javad mortazavi medical physics & medical engineering department, school of medicine, shiraz university of medical sciences, shiraz, iran ; the center for research on radiological sciences, school of allied medical sciences, shiraz university of medical sciences, shiraz, iran. shahram taeb naser dehghan

radar transmitters emit high-power radiofrequency radiation by creation of a high-voltage and high-frequency alternating electrical current.health effects of occupational exposure to military radar were investigated. visual reaction time was recorded with a simple blind computer-assisted-visual reaction time test. to assess the short-term memory, modified wechsler memory scale test was performe...

Journal: :iranian journal of radiation research 0
s.m.j. mortazavi department of medical physics and medical engineering , school of medicine, shiraz university of medical sciences, shiraz, iran n. erfani shiraz institute for cancer research, school of medicine, shiraz university of medical sciences, shiraz, iran h. mozdarani department of medical genetics, faculty of medical sciences, tarbiat modares university, tehran, iran r. azmoonfar radiology department, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran n. shokrpour school of paramedical sciences, shiraz university of medical sciences, shiraz, iran

background: radiation-induced bystander effect is a response which results in damage in non-irradiated cells in response to signals from the irradiated cells. the aim of the present study was to investigate microwave-induced bystander effect from a gsm mobile phone simulator on induction of apoptosis in jurkat cell line. materials and methods: jurkat cells were divided into three groups of non-...

Journal: :iranian journal of medical physics 0
sayyede batoul shokouhian department of biomedical engineering, faculty of engineering, university of isfahan, isfahan, iran. alireza karimian department of biomedical engineering, faculty of engineering, university of isfahan, isfahan, iran. mohammad mohammad-zadeh information communication technology (ict) faculty, ict ministry, tehran, iran department of nuclear engineering, shahid beheshti university g. c., tehran, iran hamid reza salighe-rad department of medical physics & biomedical engineering and research center for science and technology (rcstim); tehran university of medical sciences, tehran, iran.

introduction radiofrequency planar microcoils are used to increase the resolution of magnetic resonance images of small samples. in this study, we aimed to design and fabricate a spiral planar microcoil constructed on a double-sided printed circuit board (pcb). it has four rings with an internal diameter of 241 microns tuned and matched at 63.8 mhz. materials and methods to achieve the maximum ...

Journal: :Anaesthesiology intensive therapy 2014
Massimo Barbieri Martina Bellini

BACKGROUND Radiofrequency is widely used in the treatment of chronic pain for its efficacy and low incidence of side effects and complications. Despite this, it is commonly believed that this kind of treatment could interfere with medical implantable devices. Potential interference between implanted devices such as pacemakers, defibrillators and spinal cord stimulators and the radiofrequency of...

Journal: :Heart 1997
D H Bennett

OBJECTIVE To report experience with radiofrequency catheter ablation of fascicular tachycardia including two cases of the rare type of this arrhythmia which arises from the anterior fascicle of the left bundle branch. DESIGN Review of results of radiofrequency ablation in nine consecutive patients presenting with fascicular tachycardia. SETTING Regional cardiac centre. INTERVENTION Percut...

Low power single-ended operational amplifier with high slow rate in new technologies due to decreasing dimensionality and supply voltage level has attracted many researchers in recent years. These researchers often used auxiliary circuit for increasing the charging and discharging currents of load and compensation capacitances. Nevertheless, many of these methods are not able to improve the pos...

Raman amplification of a 49 cm Bismuth oxide (Bi2O3) as a nonlinear gainmedium based erbium doped fiber amplifier (EDFA) is reported in new and compactdesign in near infrared spectral regions. The bismuth glass host provides theopportunity to be doped heavily with erbium ions to allow a compact optical gain fiberamplifier design by using reduced fiber length and the 1480...

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