Many devices use pulsed RF signals. The obvious ones are echo-ranging systems like radar. Additionally, nuclear magnetic resonance (NMR) spectrometers and magnetic resonance imaging (MRI) systems use ...

The precessing nuclei in turn generate an RF magnetic-field oscillation — the NMR signal. In almost all MRI experiments, the RF field is generated by a coil of wire — the RF coil 1 — and the ...

Magnetic resonance imaging (MRI) is one of the most commonly used tests ... This alignment (or magnetization) is next perturbed or disrupted by introduction of an external Radio Frequency (RF) energy.

However, the RF energy used in MRI can increase the electrical current ... producing heat that can damage tissues at the site where a stimulating signal is delivered. Even though the FDA has ...

In this third and final instalment, we look at the basics of magnetic resonance imaging (MRI ... in figures B and C), but with a suitable radio frequency signal, approximately 60 MHz.

2, 2004 — Magnetic resonance imaging (MRI)-guided interstitial radiofrequency (RF) thermal ablation (ITA ... replaced by an enlarging zone of low signal intensity on T2-weighted and/or short ...

But a study from the lab of McGovern associate investigator Alan Jasanoff, reported in the journal Science Advances, demonstrates that MRI signals produced by the new method are generated in large ...

MRI (magnetic resonance imaging ... atoms in a static magnetic field and are subjected to a second oscillating electromagnetic field in the form of radio frequency radiation, which causes the nucleus ...

A team of researchers affiliated with multiple institutions in the Republic of Korea has developed a new way to use magnetic resonance imaging (MRI ... of brain signals on millisecond timescales.