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.

MRI provides a non-invasive means of obtaining high contrast ... The need for the high static magnetic field (B0), the use of gradient coils for MR signal location, simple RF pulse sequences and how ...

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.

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 ...

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.

Scientists have found a way to decode a stream of words in the brain using MRI scans and artificial intelligence ... The sensors detect signals in areas involved in articulating words.