US 12,263,023 B2
3D X-ray device and method for producing a 3D X-ray image
Johannes Ulrici, Darmstadt (DE); Kai Stannigel, Weinheim (DE); and Wolf Blecher, Hemsbach (DE)
Assigned to Dentsply Sirona Inc., York, PA (US)
Appl. No. 17/780,107
Filed by DENTSPLY SIRONA Inc., York, PA (US)
PCT Filed Nov. 27, 2020, PCT No. PCT/EP2020/083700
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/105402, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 19212720 (EP), filed on Nov. 29, 2019.
Prior Publication US 2023/0009790 A1, Jan. 12, 2023
Int. Cl. A61B 6/03 (2006.01); A61B 6/00 (2024.01); A61B 6/06 (2006.01); A61B 6/40 (2024.01); G21K 1/10 (2006.01); A61B 6/02 (2006.01); A61B 6/10 (2006.01); A61B 6/50 (2024.01)
CPC A61B 6/032 (2013.01) [A61B 6/06 (2013.01); A61B 6/4021 (2013.01); A61B 6/4441 (2013.01); G21K 1/10 (2013.01); A61B 6/027 (2013.01); A61B 6/107 (2013.01); A61B 6/4035 (2013.01); A61B 6/4078 (2013.01); A61B 6/501 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A 3D X-ray device comprising:
an X-ray detector;
an X-ray source; and
a computer,
wherein the X-ray detector and the X-ray source are configured to be moved about an object volume to be recorded in a craniomaxillofacial region on movement paths with a rotation of at least 185°,
wherein the computer is configured to record a plurality of X-ray projection images from different irradiation directions, with X-rays, which are produced by of the X-ray source,
the device comprising an aperture configured to form a fan beam to irradiate the object volume in one of the irradiation directions, and configured to be captured by the X-ray detector,
wherein the computer is configured to generate a 3D X-ray image of the object volume from the recorded X-ray projection images by a reconstruction method,
wherein the X-ray detector is arranged asymmetrically relative to a central axis through a center of rotation of the 3D X-ray device, wherein a first fan beam and an opposite second fan beam corresponding to a 180° of the first fan beam form an overlap region, the device further comprising:
at least one X-ray filter is disposed between the X-ray source and the object volume having a first width for attenuating an X-ray dose inside the overlap region, characterized in that the device further comprises a second X-ray filter having a second width that differs from the first width of the said at least one X-ray filter disposed inside the overlap region and wherein the second x-ray filter is provided in the regions of the two fan beams outside the overlap region.