Headache occipital neuralgia is an example of pain-disease for which treatment both pharmacological protocols and invasive methods are used. Among the latter, the RF (Radiofrequency) pulse-dose has been of interest for the prospects of analgesic efficacy, safety and patient compliance, although at the moment only data concerning the pulsed RF and not the RF pulse-dose, that represents its evolu...

The term “steady state” refers to the equilibrium condition that evolves when magnetization experiences a train of radiofrequency (RF) pulses. If RF pulses are applied on the order of seconds (TR≈T1), the magnetization decays away completely in the transverse plane between RF pulses, but may not recover fully along the longitudinal axis. In the resulting steady state, the magnetization tipped a...

Introduction: Radiofrequency ablation is an effective minimally invasive treatment for tumors. One primary source of difficulty is monitoring and controlling the ablation region. MR currently has a role in RF ablation due to its capability for temperature monitoring. RF ablation is typically performed at 480 kHz. If instead the ablation were to be performed at the Larmor frequency, then the MR ...

Myocardial heating by transcatheter delivery of radiofrequency (RF) energy has been proposed as an effective means of arrhythmia ablation. A thermodynamic model describing the radial temperature gradient at steady state during RF-induced heating is proposed. If one assumes that RF power output is adjusted to maintain a constant electrode-tissue interface temperature at all times, then this ther...

The aim of this study was to investigate the safety and effectiveness of a novel method for the selective transcoronary closure of small coronary arteries by the intraluminal application of radiofrequency (RF) energy. Twenty-six small (diameter of 1-2 mm) coronary artery branches were selected in 13 dogs. An RF electrode wire (CRW-Zcy) was placed into the target vessel and a coronary balloon wa...

PURPOSE The aim of this study was to assess the capacity of two methods of surgical pancreatic stump closure in terms of reducing the risk of pancreatic fistula formation (POPF): radiofrequency-induced heating versus mechanical stapler. MATERIALS AND METHODS Sixteen pigs underwent a laparoscopic transection of the neck of the pancreas. Pancreatic anastomosis was always avoided in order to wor...

Due to the difficulty in producing a transmural linear lesion and the possibility of complications such as thrombus formation leading to thromboembolism, the catheter-based maze procedure remains problematic. We tested, in pigs, the possibility of using a temperature-controlled cooled-tip radiofrequency (RF) ablation system together with a realtime position management (RPM) system to create a t...

reply to the letter sent by prof. viroj wiwanitkit entitled “radiofrequency radiation and human ferritin”   authors of the article entitled “effects of radiofrequency radiation on human ferritin: an in-vitro enzymun assay” [1] would like to express their satisfactions, since the manuscript have been accessed and used as an element of reflection by a renowned researchers such as prof. wiwanitkit...

Application of nuclear magnetic resonance imaging (NMRI) as a non-invasive and accurate imaging procedure has been widely used in recent years. Meanwhile, the biological effects of magnetic fields of several tesla (T) and high energy radiofrequency (RF) is not fully known yet. Because of controversy over this issue, the present research has been carried out in order to verify the effects of...

The viability of a radiofrequency (RF) telemetry channel for reporting individual neuron activity wirelessly from an embedded antenna to an external receiver is determined. Comparing the power at the transmitting antenna required for the desired Channel Capacity, to the maximum power that this antenna can dissipate in the body without altering or damaging surrounding tissue reveals the severe p...