US 12,433,552 B2
Estimating scatter in X-ray images caused by imaging system components using kernels based on beam hardening
Mathieu Plamondon, Glattbrugg (CH); Balazs Nagy, Schlieren (CH); Mathias Lehmann, Zürich (CH); Adam Michal Strzelecki, Daettwil (CH); Igor Peterlik, Kuenten (CH); and Dieter Marc Seghers, Zürich (CH)
Assigned to SIEMENS HEALTHINEERS INTERNATIONAL AG, (CH)
Filed by SIEMENS HEALTHINEERS INTERNATIONAL AG, Palo Alto, CA (US)
Filed on Oct. 21, 2022, as Appl. No. 17/970,744.
Prior Publication US 2024/0130700 A1, Apr. 25, 2024
Prior Publication US 2024/0225573 A9, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 6/40 (2024.01); A61B 6/00 (2024.01); A61B 6/03 (2006.01); G06T 11/00 (2006.01)
CPC A61B 6/4085 (2013.01) [A61B 6/032 (2013.01); A61B 6/5282 (2013.01); G06T 11/005 (2013.01); G06T 2207/10081 (2013.01); G06T 2211/452 (2023.08)] 18 Claims
OG exemplary drawing
 
1. A computer-implemented method of reducing scatter in an X-ray projection image of an object, the method comprising:
generating an initial X-ray projection image of an object with an imaging beam produced by an imaging system;
based on a first transmission indicator for the object and on a second transmission indicator for at least one element of the imaging system, selecting a kernel for convolution of the initial X-ray projection image, wherein the first transmission indicator is determined based on a portion of the object that is in a path of a ray that passes from an X-ray source of the imaging system to a first position in a detector array of an X-ray detector of the imaging system;
convolving the initial X-ray projection image with the kernel to generate a scatter component of the initial X-ray projection image; and
generating a corrected X-ray projection image by removing the scatter component from the initial X-ray projection image.