OBJECTIVE A study is carried out of the spatial distribution and time dependence of electric and thermal fields in the tissue around a radiofrequency (RF) electrode used in pain therapy. Finite-element calculation of the fields is performed, and results are compared with ex vivo tissue data. Field predictions are made for continuous and for pulsed RF applications. DESIGN A special RF cannula ...

Optically detected zero-field electron paramagnetic resonance spectroscopy is used to show that weak linearly and circularly polarized radiofrequency magnetic fields affect the recombination reactions of spin-correlated radical pairs to different extents; the spectra are shown to be consistent with the radical pair mechanism.

Remote control of aptamer function has allowed us to control protein function in space and time. Here, we propose a novel control system for aptamer function by radiofrequency magnetic field- (RFMF-) induced local heating of a gold nanoparticle conjugated with an aptamer. In this study, we used a 31-mer thrombin-binding aptamer (TBA), which can inhibit thrombin activity, as a model aptamer. We ...

M agnetic resonance imaging uses high-strength magnetic and electric fields to obtain multiplanar images with unrivaled soft tissue resolution. The image resolution and availability of various pulse sequences, each optimized for the evaluation of particular tissue attributes, make MRI the imaging modality of choice for numerous neurological, mus-culoskeletal, thoracic, and abdominal conditions....

simple snoring is a social problem, one that can gravely affect the patient's married life. about 40% of men and 20% of women are affected, and it often goes along with sleep-disordered breathing. up to now various surgical techniques have been defined such as uppp(uvulopalatopharyngo plasty), and laser-assisted uvulopalatoplasty (laup). among the surgical methods, raup (radiofrequency assisted...

background and aims:  using methods such as pulsed radiofrequency (prf) and nerve blocks are among the methods used in pain clinics to treat facet-originating low back pain. this study compares two methods of pulsed radiofrequency and facet joint block (fjb)regarding pain recovery and improving disability of patients suffering from facet-originating low back pain. material and method: 50 patien...