magnetic field

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field

 [fēld]
1. an area or open space, as an operative field or visual field.
2. a range of specialization in knowledge, study, or occupation.
3. in embryology, the developing region within a range of modifying factors.
auditory field the space or range within which stimuli will be perceived as sound.
disturbed energy field a nursing diagnosis defined as a disruption of the flow of energy surrounding a person's being that results in disharmony of the body, mind, and/or spirit.
energy field the flow of energy surrounding a person.
extended field in radiation therapy, such as for malignant lymphoma, an area of irradiation beyond the involved field. See also under irradiation.
high-power field the area of a slide visible under the high magnification system of a microscope.
individuation field a region in which an organizer influences adjacent tissue to become a part of a total embryo.
inverted Y field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation below the diaphragm, covering the spleen, extending down the midline, and branching inferiorly to form tails across the inguinal areas.
involved field in radiation therapy, such as for malignant lymphoma, the irradiated area when irradiation has been limited to sites of detectable macroscopic disease. See also under irradiation.
low-power field the area of a slide visible under the low magnification system of a microscope.
magnetic field that portion of space about a magnet in which its action is perceptible.
mantle field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation around the shoulders and chest, including the neck, clavicular regions, axillae, and mediastinum. See also under irradiation.
morphogenetic field an embryonic region out of which definite structures normally develop.
operating field (operative field) an isolated area where surgery is performed; it must be kept sterile by aseptic techniques (see surgical asepsis). Called also surgical field.
sterile field an operative field that is properly sterile according to surgical asepsis. It includes having all furniture and equipment covered with sterile drapes and all personnel being properly attired.
surgical field operative field.
visual field (F) (vf) the area within which stimuli will produce the sensation of sight with the eye in a straight-ahead position.

mag·net·ic field

the sphere of influence of a magnet.

magnetic field

An MRI term for the magnetic lines of force (flux) which extend from a north polarity and enter a south polarity of a magnet to form a closed loop around the outside of a magnetic material.

Magnetic field

The three-dimensional area surrounding a magnet, in which its force is active. During MRI, the patient's body is permeated by the force field of a superconducting magnet.
References in periodicals archive ?
With this information, it is possible to predict the magnetic fields generated by the Harrison effect in today's universe.
This is important because the magnetic fields play a pivotal role in the physics of the tenuous gas that permeates the space between stars in a galaxy.
In this paper, we present how to use and characterize the magnetic field of compound magnets using the Ferrocell, analyzing some aspects of the pattern formation and their relationship with some optical properties obtained from the presence of different distribution of the magnetic field, obtaining a map of the magnetic field.
We will first review TO for static magnetic fields. Then we will summarize different methods for enhancing static magnetic fields by using TO, and finally propose a compact super-concentrator for the first time to create over a large free space a huge static magnetic field.
The sensitivity of LSM303DLH microchip does not depend on magnetization of adjacent components, therefore when performing dynamic measurements of magnetic fields the influence of component magnetization can be eliminated.
Key words: Helmholtz coils, uniform magnetic field, COMSOL simulation, magnetic measurements
According to Vassilis Angelopoulos of the University of California, Los Angeles, Principal Investigator for NASA's THEMIS mission (Time History of Events and Macroscale Interactions during Substorms), "The discovery overturns a long-standing belief about how and when most of the solar particles penetrate Earth's magnetic field, and could be used to predict when solar storms will be severe."
The correlation spectrometer is itself a solenoid with a uniform magnetic field and a magnetic plug at one of its ends.
In one session, the women were exposed all night (2300-0700 hr) to the generated 60-Hz magnetic fields. The other session was a control condition similar in all respects, except that it did not involve exposure to the magnetic fields.
Electric and Magnetic Fields (EMF) are the result of the generation, distribution, and use of electricity.
A burst of solar particles slammed into Earth's magnetic field, causing an electromagnetic storm that blew out electrical power lines.
These instruments range from superconducting quantum interference devices, or SQUIDs, for measuring the small picotesla magnetic fields of the human heart and brain, to Hall effect gauss meters used to measure extremely large magnetic fields, such as the 30 T magnetic field - the world's largest - at the Massachusetts Institute of Technology's National Magnet Laboratory in Cambridge.