Patent ID: 9743901
Date: 2017-08-29
CPC Classifications: A61B,G01N

Claim:
1. An X-ray imaging apparatus, comprising: an X-ray source configured to radiate X-rays onto a subject region; an X-ray detector configured to detect the radiated X-rays, and obtain a plurality of frame images of the subject region, based on the detected X-rays; a collimator disposed between the X-ray source and the X-ray detector, and configured to adjust a range of the subject region; and a region of interest (ROI) filter disposed between the collimator and the X-ray detector, and configured to filter the X-rays radiated from the X-ray source, the ROI filter comprising a plurality of filter layers, wherein a first filter layer among the plurality of filter layers is configured to be disposed above a second filter layer among the plurality of filter layers and along a line orthogonal to surfaces respectively of the collimator and the X-ray detector, the surfaces face each other, and each of the plurality of filter layers is configured to be independently translatable in a direction along the line toward the collimator or the X-ray detector.