image beam

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• Image-guided radiation therapy — (IGRT) is the process of frequent two and three dimensional imaging, during a course of radiation treatment, used to direct radiation therapy utilizing the imaging coordinates of the actual radiation treatment plan. The patient is localized in… …   Wikipedia

• Beam's eye view — (or BEV) is an imaging technique used in radiation therapy for the quality assurance and planning of External Beam Radiation Therapy treatments. These are primarily used to ensure that the relative orientation of the patient and the treatment… …   Wikipedia

• Beam tracing — is a derivative of the ray tracing algorithm that replaces rays, which have no thickness, with beams. Beams are shaped like unbounded pyramids, with (possibly complex) polygonal cross sections. Beam tracing was first proposed by Paul Heckbert and …   Wikipedia

• Beam Me Up Scotty (Mixtape) — Beam Me Up Scotty Remixalbum von Nicki Minaj Veröffentlichung 18. April 2009 Label Trapaholics …   Deutsch 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 splitter — Schematic representation of a beam splitter cube 1 Incident light 2 50% Transmitted light 3 50% Reflected light …   Wikipedia

• beam — Synonyms and related words: AM signal, CRT spot, DM display, Doppler signal, FM signal, H beam, I beam, IF signal, IF video signal, IM display, RF amplifier, RF echoes, RF signal, RF stage, TV band, X ray, abutment, actinic ray, actinism,… …   Moby Thesaurus

• Image dissector — The image dissector was an early all electronic television camera tube invented by Philo Farnsworth.Most experimental television systems in the 1920s and 1930s made use of an electromechanical system, usually a Nipkow disk combined with a single… …   Wikipedia

• image orthicon — noun a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons (Freq. 1) •… …   Useful english dictionary

• image dissector — noun : a camera tube resembling the iconoscope and having the electronic image focused electromagnetically through an aperture and voltages that are subsequently amplified and transmitted as television picture signals being produced by electron… …   Useful english dictionary

• image orthicon — Television. a camera tube, more sensitive than the orthicon, in which an electron image generated by a photocathode is focused on one side of a target that is scanned on its other side by a beam of low velocity electrons to produce the output… …   Universalium