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BEAM

 
brain electric activity map; trademark name for a map of brainwave activity derived from a computerized enhancement of electroencephalographic records.

beam

 [bēm]
a unidirectional, or approximately unidirectional, emission of electromagnetic radiation or particles.
useful beam in radiology, that part of the primary radiation that is permitted to emerge from the tubehead assembly of an x-ray machine, as limited by the aperture or port and accessory collimating devices.
beam splitter a device that reflects light from the output phosphor of an image intensifier to a photographic recording. Called also image distributor.

beam

(bēm),
1. Any bar the curvature of which changes under load; in dentistry, frequently used instead of "bar."
2. A collimated emission of light or other radiation, such as an x-ray beam.
[O.H.G. Boum]

beam

Etymology: ME, beem, tree
1 a bedframe fitting for pulleys and weights, used in the treatment of patients requiring weight traction. See Balkan traction frame.
2 (in radiology) the primary beam of radiation emitted from the x-ray tube.

BEAM

[bēm, bē′ē′ā′em′]
abbreviation for brain electric activity map.

beam

Drug slang
A regional synonym for cocaine.
 
Radiation oncology
A focused stream of particles or electromagnetic radiation which is focused in a single direction or body region as part of a therapeutic regimen.

BEAM

Abbreviation for:
BCNU, etoposide, cytarabine, melphalan (a chemotherapy regimen)
Biomedical Equipment Assessment & Management (Medspeak-UK)
brain electrical activity mapping

beam

(bēm)
1. Any bar with a curvature that changes under load.
2. dentistry Synonym(s): bar (2) .
3. A collimated emission of light or other radiation, such as an x-ray beam.
[O.H.G. Boum]

beam

(bēm)
1. Any bar the curvature of which changes under load; in dentistry, frequently used instead of "bar."
2. A collimated emission of light or other radiation.
[O.H.G. Boum]

beam,

n a stream or approximately unidirectional emission of electromagnetic radiation or particles.
beam, central,
n the center of the beam of roentgen rays emitted from the tube.
beam, useful,
n the part of the primary radiation that passes through the aperture, cone, or other collimator.

beam

a unidirectional emission of electromagnetic radiation. See also x-ray.

external beam therapy
radiotherapy in which the source is at a distance from the patient, e.g. orthovoltage, cesium-137, cobalt-60 or linear accelerator.
beam limitation
restriction of the divergent beam as it appears from the tube window by a lead plate or cone or a light beam diaphragm located at the window.
primary beam
the radiation beam as it passes through the window of the x-ray tube and before it is modified by extra-tube devices.
References in classic literature ?
She saw the ample, motherly form of Rachel, as she ever and anon came to the bedside, and smoothed and arranged something about the bedclothes, and gave a tuck here and there, by way of expressing her good-will; and was conscious of a kind of sunshine beaming down upon her from her large, clear, brown eyes.
Micawber, who had been beaming and smiling, all over his head and face, up to the present moment, checked himself and frowned - 'the miserable wretch you behold.
Here matter new to gaze the Devil met Undazl'd, farr and wide his eye commands, For sight no obstacle found here, nor shade, But all Sun-shine, as when his Beams at Noon Culminate from th' AEQUATOR, as they now Shot upward still direct, whence no way round Shadow from body opaque can fall, and the Aire, No where so cleer, sharp'nd his visual ray To objects distant farr, whereby he soon Saw within kenn a glorious Angel stand, The same whom JOHN saw also in the Sun: His back was turnd, but not his brightness hid; Of beaming sunnie Raies, a golden tiar Circl'd his Head, nor less his Locks behind Illustrious on his Shoulders fledge with wings Lay waving round; on som great charge imploy'd Hee seemd, or fixt in cogitation deep.
cried Silver, broad awake and beaming with good nature in a moment.
For some reason or other, the house was crowded that night, and the fat Jew manager who met them at the door was beaming from ear to ear with an oily tremulous smile.
Giry, like the martyr that she was, raised her head, her face beaming with faith in her own innocence.