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Isocenter inaerial photography: it is a point where a line cuts an angle of 90 degree of tier/2.[clarification needed]It is the point on the aerial photo platform that directly falls on a line half-way between the Principal point and the Nadir point.Inimaging physics andradiation oncology, theisocenter is termed as the point in space through which the central rays of the radiation beams pass.
Inradiation oncology there is typically talk of two isocenters:
Radiation isocenter is the point in space through which the central beam of radiation passes whereas the mechanical isocenter is the point where optical beams intersect. The two are closely related but differ in terms of their functionality and working in Space.
Isocenter definition inRadiotherapy:
The point in space relative to the treatment machine about which various components of the linac rotate. Thegantry rotation definesa horizontal axis which cuts a vertical axis defined by the rotation of the treatment couch. The treatment collimators alsorotate about an axis pointing through the isocentre.
Thesource to isocenter distance (SIsoD) can be an important parameter to control in determining patient exposure and image quality in diagnosticcomputed tomography andfluoroscopy.
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