US 12,433,557 B2
Self-shielding and movable gantry and breast computed tomography apparatus with the same
Kichang Song, Goyang-si (KR)
Assigned to DIRex Korea Co., Ltd., Goyang-si (KR)
Filed by DIRex Korea Co., Ltd., Goyang-si (KR)
Filed on Aug. 7, 2023, as Appl. No. 18/366,464.
Prior Publication US 2025/0049407 A1, Feb. 13, 2025
Int. Cl. A61B 6/50 (2024.01); A61B 6/00 (2006.01); A61B 6/10 (2006.01); A61B 6/42 (2024.01)
CPC A61B 6/502 (2013.01) [A61B 6/107 (2013.01); A61B 6/4208 (2013.01); A61B 6/4447 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A breast computed tomography apparatus comprising:
a frame shaped like a box and having an interior formed with a space;
a rotary gear rotatably coupled to the interior of the frame;
a low-dose subminiature nano cold-cathode field-emission digital X-ray tube coupled to a first side of the rotary gear and generating X-rays based on high voltage applied thereto;
a perovskite type high-sensitive low-dose X-ray detector coupled to a second side of the rotary gear, receiving the X-rays generated from the X-ray tube and transmitted through a subject, converting the received X-rays into an electrical signal, and transmitting the electric signal to a data collector;
a shield formed on the entire inner surface of the frame except for an opening through which the subject is inserted at one side of the frame, the shield preventing X-rays generated from the X-ray tube from leaking to the outside of the frame;
an image reconstructor configured to reconstruct an image formed by the electrical signal converted by the X-ray detector; and
an image display configured to display the image reconstructed by the image reconstructor,
wherein the rotary gear is movable up and down or left and right with respect to the frame,
wherein the X-ray tube and the X-ray detector are disposed symmetrically with respect to a rotational center axis line to maintain a relative position therebetween, and
wherein the frame comprises an opening on the second side thereof to insert the subject therein, and the frame comprises a shield on an entire inner surface thereof to shield against the X-rays generated by the X-ray tube,
wherein the image reconstructor pixel-shifts a previous image captured before an image taking date relative to an image captured on the image taking date, calculates a change in pixel value between the two images through digital subtraction at corresponding pixels, and reconstructs an image in which the calculated change is reflected for each pixel.