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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 periodicals archive ?
During Space Hop, the Dalek will also be beaming down in Newcaslte's East End Library on Saturday, July 26, from 1pm and Gosforth Library on Friday, August 6, from 10am.
When Alex McLeish's side take to the field to face Portsmouth tonight, a giant Phillips TV screen will be beaming down from the corner of the newly-renamed Gil Merrick Stand and the Main Stand.
There is free electricity beaming down on one's house; one just needs to know how to use it.
But the new Mariscos Los Arcos, with its bright blue sign beaming down De Soto Avenue in Canoga Park, also presents free cups of a pretty good red clam chowder to kick off the meal.
These are the faces of Birmingham - and will soon be beaming down from city billboards.
The technomaster, beaming down crazy ideas from a zeppelin above London, is evil genius John Lumic (Roger Lloyd Pack, aka Only Fools And Horses dipstick Trigger).
OK, so camp cleaning queen Kim and dirt detective Aggie MacKenzie may make the unlikeliest of superstars and it's almost disturbing to think of their cherubic faces beaming down at Manhattan from billboards and buses, but they really do work well in their glitzier environment.
Imagine how they must feel with the faces of their Most Hated Ones, Bill "Anti-Christ" Clinton and his Jezebel, Hillary, beaming down from every Barnes and Noble in the country.
And he is not alone as children from all over the area enjoy looking at the many Father Christmases and snow men beaming down at them.
Regulars at the weekly movie quiz in Highgate boozer Boogaloo were astounded to watch the ex Hear'Say singer's grinning face beaming down from a big screen to ask the tricky film poser: "Good evening Boogaloo, tonight's celebrity question is who wrote the original book that the film Rules of Attraction is based on?
Now Magic 1548, part of the Radio City Empire beaming down from the St John's Tower, has signed up his services for a weekly show.