| 摘要 |
An x-ray beam hardening filter (100) is disclosed. The X-ray beam hardening filter (100) comprises a support member (110) and a beam hardening sheet (120), the beam hardening sheet (120) having a multidimensional array of regularly spaced apertures (130). The apertures (130) are configured to have an x-ray transmissive quality. An actuator (300), engaging the support member (110), is capable of moving the multidimensional array of apertures (130) into or out of a path of an X-ray beam, thereby selectively introducing varying levels of X-ray energy filtration. In one embodiment, multiple layers of beam hardening sheets (610, 620) are added to the X-ray beam hardening filter (100) to create additional levels of X-ray energy filtration. Advantages of the X-ray beam hardening filter (100) include the relatively small distance the X-ray beam hardening filter (100) must move in order to absorb the incident X-ray beam, the ability to introduce varying levels of X-ray filtration, and the compact structure of the X-ray beam hardening filter (100). |
