Although the important role of the immune system in defending the human body against infections and cancer, only few studies on the possible effects of radiofrequency radiation on the function of human immune cells have been undertaken. The present study was performed to investigate whether radio frequency (RF) field exposure could affect the activity of human immune system cells by studying th...

Ad ddr dres ess s f fo for r Co Corr res espo p d nd nde ence ce: : Abstract Background—Radiofrequency (RF) ablation of atrial fibrillation (AF) has been associated with

In parallel excitation, the computational speed of numerical radiofrequency (RF) pulse design methods is critical when subject dependencies and system nonidealities need to be incorporated on-the-fly. One important concern with optimization-based methods is high peak RF power exceeding hardware or safety limits. Hence, online controllability of the peak RF power is essential. Variable-rate sele...

OBJECTIVE To determine the efficacy and safety of radiofrequency (RF) ablation of vesicles and the resulting symptomatic control of microcystic lymphatic malformation (LM) in the oral cavity. DESIGN An institutional review board-approved retrospective study with follow-up telephone interview. SETTING Tertiary pediatric medical center. Patients Eleven children (6 girls and 5 boys), aged 4 to...

An equivalent parallel resistor-inductor-capacitor (RLC) circuit with beam loading for a polarized TM110 dipole-mode cavity is developed and minimum radiofrequency (rf) generator requirements are calculated for the Advanced Photon Source (APS) short-pulse x-ray (SPX) superconducting rf (SRF) crab cavities. INTRODUCTION The polarized TM110 dipole-mode loss parameter is defined as [1]: U y V Q y ...

Since its introduction in 1987, radiofrequency (RF) ablation has developed to become the treatment of choice for symptoms caused by atrio ventricular (AV) reentrant tachycardia, isthmus related atrial flutter, AV-nodal reentrant tachycardia and to some extent also for certain types of ventricular tachycardias. The introduction of new cardiac activation mapping systems has further contributed to...

Over the last few years, percutaneous radiofrequency (RF) ablation has been successfully established as a viable treatment modality for small peripheral renal cell carcinoma (RCC). This technique is limited by central tumor location and tumor size. We report the interventional management of a 5.3 cm mixed RCC with central and exophytic parts by combining the RF ablation with embolization, taggi...

We report a rare case of atrial tachycardia originating from the non-coronary aortic sinus. After failed radiofrequency (RF) energy applications at right His-bundle region, the complete elimination of atrial tachycardia was achieved with an RF energy application in the non-coronary aortic sinus. With the review of other papers, this report emphasizes the importance of mapping in the non-coronar...

In numerical analyses of radiofrequency (RF) fields for MRI, RF power is often permitted to radiate out of the problem region. In reality, RF power will be confined by the magnet bore and RF screen enclosing the magnet room. We present numerical calculations at different frequencies for various surface and volume coils, with samples from simple spheres to the human body in environments from fre...