Untitled Quiz

An imaging technique producing high-quality images of the inside of the human body, based on the principles of nuclear magnetic resonance.

An object surrounded by a magnetic field that attracts iron or steel.

A region around a magnet or electric current where a detectable magnetic force exists.

Categorization of magnets based on the origin of their magnetic properties; natural, permanent, or electromagnets.

Materials unaffected by magnetic fields.

Materials weakly repelled by a magnetic field.

Materials weakly attracted to a magnetic field.

Materials strongly attracted to a magnetic field.

Superconductive magnets produce high field strengths, leading to a high signal-to-noise ratio (SNR) in MRI.

Permanent magnets generate magnetic fields ranging from 0.06 to 0.35 Tesla.

A sudden loss of superconductivity in a magnet, leading to a loss of the magnetic field.

Permanent magnets are constructed from blocks or slabs of naturally occurring ferrous materials.

The portion of a magnetic field that extends beyond the magnet's body and is unusable for imaging.

Gauss and Tesla; Tesla is a larger unit than Gauss with 1 Tesla = 10,000 Gauss.

Electromagnets made of coils of wire. Can produce magnetic fields by passing electricity through the coils. Heat generation limits the max field strength.

Electromagnets with superconducting coils cooled by cryogens (liquid helium/nitrogen), which minimizes electrical resistance for stronger magnetic fields.

Up to 0.3 Tesla.

The magnet is the major component, large enough to surround the patient and antennas for radio wave transmission/reception.

Resistive, Superconductive, and Permanent magnets are used to create the magnetic field needed for MRI scans.

Electromagnets with coils of superconducting wire, cooled to very low temperatures (cryogenic) that reduces electrical resistance, so stronger magnetic fields are achievable.