useful beam

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useful beam,

(in radiology) that part of the primary radiation that is permitted to emerge from the tube head assembly of an x-ray machine, as limited by the aperture or port and accessory collimating devices.

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,

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.

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backscatter radiation beam splitter café-au-lait spot compensating filter corpuscular radiation electromagnetic radiation filter ionizing radiation leakage Port radiation radiation caries radiation detector radiation hygiene radiation leakage secondary radiation spot stray radiation useful radiation			The letter stated the firm's diagnostic x-ray systems do not comply with the following items of the Performance Standard: "We measured the entrance exposure rate in the manual mode of the fluoroscopic system to be 27 roentgens per minute at the point where the center of the useful beam enters the patient. Radiologicals/mammography by Warning Letter Bulletin Gordon, a physicist at the Jacob Blaustein Institute for Desert Research at Ben-Gurion University of the Negev in Sede Boqer, and his colleagues knew that radiation from the sun is more than sufficient to match a medical laser's output, but they faced the problem of how to concentrate sunlight into useful beams. Sunlight acts like laser. (Solar Surgery) by Marzuola, C. / Science News Such sub-50nm gates can be structured to run at optimum exposure current and the coarser pads exposed with a useful beam current greater than 100nA and a maximum deflection rate of 50MHz in an automatic exposure cycle. Vistec Lithography Presents the Latest Version of Its EBPG Product ... by Business Wire			urticaria urticaria bullosa urticaria endemica urticaria hemorrhagica urticaria maculosa urticaria medicamentosa urticaria papulosa urticaria pigmentosa urticarial urticarial fever urticarium urticate urtication urushiol US US Army USAN USAN Council USB USDA USDHHS use use effectiveness use factor use test useful beam useful radiation user user documentation user friendly user interaction USFMG USG Usher syndrome Usher's syndrome USMLE usnea USNF USOH USP USP unit USPHS USR test USRDS ustilaginism Ustilago zeae usual fee usual interstitial pneumonia usual, customary and reasonable usui shiki ryoho Usui System of Natural Healing			Used to Love Her Used Truck Association used up used up used up used up Used Vehicle Information Package Used Vehicle Measurement Standard Used Vehicles Importers Association Used With used with another thing Used, But in Good Condition used-car used-car lot Used-Fuel Packaging Plant Used-Vehicle Sales and Certification Study USEDA USEDC Usedom Usedom Peninsula USEE USEEP USEF USEFI useful useful useful useful useful Useful Basque phrases useful beam Useful Field of View Useful Heat Value Useful Information Useful life Useful life Useful Lifes Useful line Useful Lives Useful Minerals useful office Useful Plants of West Tropical Africa useful radiation useful radiation useful radiation usefully usefully usefulness usefulness usefulness usefulness Usefulness of Training Topics for Domestic Violence Questionnaire USEG USEI USEIA USEIC USEIGHT Usein Kysytyt Kysymykset Useinov, Mikael Useinov, Mikael Aleskerovich USEIR

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