- 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 tubehead aperture or port and accessory collimating devices.
Medical dictionary. 2011.
useful beam
Look at other dictionaries:
useful beam — naudingasis pluoštas statusas T sritis fizika atitikmenys: angl. useful beam vok. Nutzstrahl, m; Nutzstrahlenbündel, n rus. используемый пучок, m; полезная часть пучка, f; полезный пучок, m pranc. faisceau utile, m … Fizikos terminų žodynas
Beam tilt — is used in radio to aim the main lobe of the vertical plane radiation pattern of an antenna below (or above) the horizontal plane.The simplest way is mechanical beam tilt, where the antenna is physically mounted in such a manner as to lower the… … Wikipedia
Beam-powered propulsion — is a class of spacecraft propulsion mechanisms that use energy beamed to the spacecraft from a remote power plant. Most designs are rocket engines where the energy is provided by the beam, and is used to superheat propellant that then provides… … Wikipedia
BEAM robotics — The word beam in BEAM robotics is an acronym for Biology, Electronics, Aesthetics, and Mechanics . This is a term that refers to a style of robotics that primarily uses simple analog circuits, such as comparators, instead of a microprocessor in… … Wikipedia
Beam diameter — The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be obtained in many… … Wikipedia
Beam compass — Compass Com pass (k[u^]m pas), n. [F. compas, fr. LL. compassus circle, prop., a stepping together; com + passus pace, step. See {Pace}, {Pass}.] 1. A passing round; circuit; circuitous course. [1913 Webster] They fetched a compass of seven day s … The Collaborative International Dictionary of English
primary beam — useful b … Medical dictionary
External beam radiotherapy — otherwise known as teletherapy, is the most frequently used form of radiotherapy. The patient sits or lies on a couch and an external source of radiation is pointed at a particular part of the body. Kilovoltage (also known as Superficial or Deep) … Wikipedia
Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… … Wikipedia
Gaussian beam — In optics, a Gaussian beam is a beam of electromagnetic radiation whose transverse electric field and intensity (irradiance) distributions are well approximated by Gaussian functions. Many lasers emit beams that approximate a Gaussian profile, in … Wikipedia
