Patent ID: 9439612
Filing Date: 2016-09-13
CPC Classification: A61B,G21K

Claim Text:
1. An X-ray imaging system comprising: an X-ray source for generating an X-ray beam; an X-ray detector for detecting said X-ray beam; a gantry for rotating said X-ray source and said X-ray detector around an imaging subject; an X-ray filter having a rotatable filter element positioned between said X-ray source and said imaging subject configured to rotate around an internal axis during rotation of said X-ray source and X-ray detector wherein an amount of attenuation of said X-ray beam by said rotatable filter element is a function of angular orientation of said rotatable filter element around said internal axis; a stationary filter element conforming to outer edges of said rotatable filter element; and a rotation controller for synching rotation of said rotatable filter element with rotation of said X-ray source.