نتایج جستجو برای: radiofrequency interference

تعداد نتایج: 114522  

Journal: :anesthesiology and pain medicine 0
bahram naderi nabi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran abbas sedighinejad department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran mohammad haghighi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran gelareh biazar department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran; department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran. tel: +98-1333329523, fax: +98-1313222021 masood hashemi department of anesthesiology, shahid beheshti university of medical sciences, tehran, iran soodabeh haddadi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran

conclusions both tens and prf lumbar sympathectomy are promising pain relief treatments for painful dnp. however, prf lumbar sympathectomy seems to have a superior efficacy. further studies with a larger sample size and a longer follow-up period are needed. background painful diabetic peripheral neuropathy (dpn) is a long-term complication of type 1 and type 2 diabetes that majorly impacts qual...

2012
Zaihan JIANG

It is well known that a Code Division Multiple Access (CDMA) scheme achieves higher user density in a cellular network with radio frequency signal in a terrestrial environment than either Time Division Multiple Access (TDMA) or (Frequency Division Multiple Access) FDMA could. The concept of a cellular (cluster) network has been introduced for underwater acoustic communications. However, its per...

2010
L. Kogan F. Owen

Recently Ramana Athrea published a new algorithm ([1]) based on the difference at fringe rates of a source in the sky and ground-based RFI. His algorithm works only for ground-based and constantamplitude RFI during a solution interval. We modified his algorithm to include a possible change of the RFI’s amplitude during the solution interval and developed another algorithm based on Högbom CLEANi...

2003
D. Anish Roshi Anish Roshi Rick Perley

Radio interferometric observations are less susceptible to radio frequency interference (RFI) than single dish observations. This is primarily due to : (1) fringe-frequency averaging at the correlator output and (2) bandwidth decorrelation of broadband RFI. Here, we propose a new technique to improve RFI suppression of interferometers by replacing the fringe-frequency averaging process with a d...

Journal: :iranian red crescent medical journal 0
azar sattarinezhad department of endocrinology, namazi hospital, shiraz, ir iran alireza rasekhi department of radiology, namazi hospital, shiraz, ir iran mahmood soveid department of endocrinology, namazi hospital, shiraz, ir iran; department of endocrinology, namazi hospital, shiraz, ir iran. tel: +98-9173158915, fax: +98-7136474316

conclusions radiofrequency ablation may be used successfully in the treatment of parathyroid adenoma when a patient cannot tolerate surgery. case presentation a 47-year-old patient was referred to our hospital (namazi hospital, shiraz, iran) in april, 2015 with intracranial hemorrhage, as well as high serum calcium and pth (parathyroid hormone) levels (12.1 mg/dl and 1062 pg/ml, respectively), ...

Journal: :iranian journal of cancer prevention 0
mohammad houshyari department of radiation oncology, shohada hospital, shahid beheshti university of medical sciences, tehran, iran anya jafari department of radiation oncology, shohada hospital, shahid beheshti university of medical sciences, tehran, iran ahmad mostaar department of medical physics, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran

physical agents such as ultraviolet or ionizing radiation and repetitive trauma have been related to the causation of cancer in humans. much less clear is the association between exposure to radiofrequency, such as radar and microwave radiation to the development of cancer. sporadic case reports and small series suggest that this type of radiation might lead to cancer or contribute to its evolu...

Journal: :iranian journal of medical physics 0
a. montaseri m.sc. in medical physics, medical physics dept., tarbiat modarres university, tehran, iran. m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modarres university, tehran, iran. sh. akhlaghpour assistant professor, radiology dept., tehran university of medical sciences, tehran, iran. m. r. alinaghizadeh m.sc. of medical physics, noor medical imaging center, tehran.

introduction: one of the minimally invasive methods of treatmenting liver malignancies is radiofrequency ablation (rfa) which can be applied to primary or secondary tumors. nevertheless, the disease recurrence is probable after rfa application partially due to the inadequate capability of temperature monitoring of the target tissue and visualizing the thermal damage. the goal of this work was t...

Journal: :iranian journal of radiology 0
mi-young kim departments of internal medicine, chonnam national university medical school, gwangju, korea jin woong kim departments of radiology, chonnam national university medical school, gwangju, korea dae-seong myung departments of internal medicine, chonnam national university medical school, gwangju, korea chung-hwan jun departments of internal medicine, chonnam national university medical school, gwangju, korea wan-sik lee departments of internal medicine, chonnam national university medical school, gwangju, korea yang jun kang departments of radiology, chonnam national university medical school, gwangju, korea

patients and methods this was a retrospective study including 207 consecutive patients who were enrolled using computerized hepatocellular carcinoma database consisting of 105 patients who underwent combined tace with rfa, and 102 patients who underwent tace alone with long-term follow-up. results the complete remission rate was meaningfully higher in the combination group (97.1%, 102/105) than...

Journal: :European heart journal 1999
G P Kimman N M van Hemel E R Jessurun P F van Dessel J C Kelder J J Defauw G M Guiraudon

AIMS Although arrhythmia surgery and radiofrequency catheter ablation to cure atrioventricular nodal reentrant tachycardia differ in technical concept, the late results of both methods, in terms of elimination of the arrhythmogenic substrate and procedure-related new and different arrhythmias, have never been compared. This constituted the purpose of this prospective follow-up study. METHODS ...

2012
V. R. Supradeepa Christopher M. Long Rui Wu Fahmida Ferdous Ehsan Hamidi Daniel E. Leaird Andrew M. Weiner

Photonic technologies have received considerable attention regarding the enhancement of radiofrequency electrical systems, including high-frequency analogue signal transmission, control of phased arrays, analog-to-digital conversion and signal processing. Although the potential of radiofrequency photonics for the implementation of tunable electrical filters over broad radiofrequency bandwidths ...

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