US 12,133,750 B2
X-ray imaging apparatus
Hidetaka Takezawa, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/629,070
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed May 7, 2020, PCT No. PCT/JP2020/018557
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/033370, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 2019-150679 (JP), filed on Aug. 20, 2019.
Prior Publication US 2022/0273251 A1, Sep. 1, 2022
Int. Cl. A61B 6/00 (2024.01); A61B 6/04 (2006.01)
CPC A61B 6/0407 (2013.01) [A61B 6/4441 (2013.01); A61B 6/481 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An X-ray imaging apparatus comprising:
an imaging unit including an X-ray source for irradiating a subject with X-rays and an X-ray detection unit for detecting the X-rays transmitted through the subject, the imaging unit being configured to capture an original image which includes a plurality of pixels;
a moving mechanism including a top board for placing the subject thereon, the moving mechanism being capable of moving at least one of the top board and the imaging unit to change a relative position between the top board and the imaging unit; and
an image processing unit configured to
acquire a plurality of original images while changing the relative position by the moving mechanism and generate a subject image based on the plurality of original images,
set a reference plane that includes a plurality of pixel corresponding points and is an imaging region of the subject image based on the plurality of original images and determine pixel values of the plurality of pixel corresponding points included in the reference plane based on the plurality of original images coordinate-transformed on the reference plane to generate the subject image on the reference plane,
identify the original image captured with an incident of the X-ray irradiated from the X-ray source to the pixel corresponding point for each of the plurality of pixel corresponding points,
in a case where the original image which is identified is a single image, determine the pixel value of a reached pixel of the X-ray irradiated from the X-ray source and passed through the pixel corresponding point among the plurality of pixels in the identified original image as the pixel value of the pixel corresponding point, and
in a case where there is a plurality of original images which is identified, determine the pixel value of a reached pixel of the X-ray irradiated from the X-ray source and passed through the pixel corresponding point in the identified original image in which the difference value between the pixel value of the reached pixel and a pixel value of a background portion is large, among the plurality of original images, as the pixel value of the pixel corresponding point.