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Publication

Eddy current effects on a clinical 7T-68 cm bore scanner

Rolf Gruetter, Tobias Kober, José Pedro Rebelo Ferreira Marques, Wietske Van der Zwaag, Gunnar Krüger
2010
Journal Articles

Abstract

Eddy currents induced by switching of magnetic field gradients can lead to distortions in short echo-time spectroscopy or diffusion weighted imaging. In small bore magnets, such as human head-only systems, minimization of eddy current effects is more demanding because of the proximity of the gradient coil to conducting structures.

Official source

https://infoscience.epfl.ch/entities/publication/97305a76-da80-4dd3-b6bb-708eb7a7fe79

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Rolf Gruetter, Tobias Kober, José Pedro Rebelo Ferreira Marques, Wietske Van der Zwaag, Gunnar Krüger
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/97305a76-da80-4dd3-b6bb-708eb7a7fe79

About this result

Related concepts (20)

Eddy current

In electromagnetism, eddy currents (also called Foucault's currents) are loops of electric current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction or by the relative motion of a conductor in a magnetic field. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor.

Boundary current

Boundary currents are ocean currents with dynamics determined by the presence of a coastline, and fall into two distinct categories: western boundary currents and eastern boundary currents. Eastern boundary currents are relatively shallow, broad and slow-flowing. They are found on the eastern side of oceanic basins (adjacent to the western coasts of continents). Subtropical eastern boundary currents flow equatorward, transporting cold water from higher latitudes to lower latitudes; examples include the Benguela Current, the Canary Current, the Humboldt (Peru) Current, and the California Current.

Magnetic resonance imaging

Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body. MRI does not involve X-rays or the use of ionizing radiation, which distinguishes it from computed tomography (CT) and positron emission tomography (PET) scans.

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