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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

mag·net·ic field

the sphere of influence of a magnet.
Farlex Partner Medical Dictionary © Farlex 2012

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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Shigemoto, "Magnetic force microscopy investigation of the domain structure of nanocomposite [Nd.sub.2][Fe.sub.14]B/[Fe.sub.3]B magnets," Acta Materialia, vol.
This study is the first to evaluate the repair of a cartilage defect using iPS cells labeled magnetically in combination with an external magnetic force. m-iPS cells were delivered to the cartilage defect of the knee joint by an external magnetic field, and the defect was covered by hyaline-like cartilage.
where ([??], [??]) is the position vector of MNP, [[??].sub.pr] and [[??].sub.pz] are the two components of MNP velocity, and [[??].sub.mr] and [[??].sub.mz] are the two components of magnetic force. The origin of the cylindrical coordinate system is strictly located at the geometric center of coils and the container.
If the strength of a Halbach array is unrestricted, then the magnetic force can be increased simply by using stronger magnets.
[15], the magnetic force between two magnets with parallel and perpendicular magnetization can be expressed as [F.sub.parallel] and [F.sub.perpendicular], separately.
The terms included in the equation are gravity, buoyancy, pressure gradient term, added mass term, drag (skin friction and form drag) and the magnetic force term.
The numerical values of the expressions for the electrical and magnetic forces, written in a "Coulombless" form with the charge replaced by the ultimate momentum of the electron, coincide with these values based on standard expressions at the following conditions:
We can do this by utilzing the intrinsic weight of the sphere to hold it down along a non-magnetic guide, and also implementing 0.15 mm offset to insure the vertical component of magnetic force is slightly downward.
In our improved GVF active contour model, the external force field is made of two parts: one is the static GVF force field, the other is the dynamic magnetic force field.
The pump can be driven by holding a separate device over the skin to generate a magnetic force. An artificial heart using the pump worked successfully in animal testing.
* A strong magnetic force is hard to resist, especially when the draw causes an amazing effect ...