Patent ID: 6507639
Filing Date: 2003-01-14
Classification: A61B,H05G

Abstract:
A method for modulating a radiation dose from an x-ray tube, comprising the steps of:(a) providing an x-ray tube having at least one variable operating parameter which, when varied, modulates a radiation dose, with a modulation speed, for x-rays produced by said x-ray tube; (b) operating said x-ray tube while varying said operating parameter through a parameter range and generating modulation speed data representing modulation speeds respectively for different values of said operating parameter; (c) identifying an exposure effect, associated with exposure of a subject to said radiation dose, that is dependent on modulation of said radiation dose; and (d) varying said operating parameter in advance of a time at which said exposure effect is to be achieved, according to said modulation speed data, to modulate said radiation dose while irradiating said subject with x-rays from said x-ray tube to produce said exposure effect at said time.