公开(公告)号：US20230263487A1

公开(公告)日：2023-08-24

申请号：US18017143

申请日：2021-07-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： KLAUS ALFRED ERHARD ,  HEINER DAERR ,  ARTUR SOSSIN ,  AXEL THRAN ,  BERNHARD JOHANNES BRENDEL ,  CHRISTIAN HAASE ,  CLAAS BONTUS

IPC: A61B6/12 ,  A61B6/00

CPC classification number: A61B6/12 ,  A61B6/4441 ,  A61B6/52

Abstract: A spectral X-ray imaging system (100) includes an X-ray source (110) and an X-ray detector (120) that are mounted to a support structure (150). The support structure (150) is configured to rotate the X-ray source (110) and the X-ray detector (120) around two or more orthogonal axes (A-A′, B-B′). One or more processors (130) are configured to cause the system (100) to perform operations that include: generating a spectral image based on the spectral image data; and identifying, in the spectral image, a position of a first fiducial marker (180i) comprising a first material, based on a first X-ray absorption k-edge energy value (190i) of the first material.

公开(公告)号：US20240127500A1

公开(公告)日：2024-04-18

申请号：US18276902

申请日：2022-02-15

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： BERNHARD JOHANNES BRENDEL ,  KLAUS ALFRED ERHARD ,  CLAAS BONTUS ,  ARTUR SOSSIN ,  AXEL THRAN ,  HEINER DAERR

IPC: G06T11/00 ,  G06T5/50 ,  G06T5/70

CPC classification number: G06T11/006 ,  G06T5/50 ,  G06T5/70 ,  G06T2211/408

Abstract: The present invention relates to a method (1), resp. a device, system and computer-program product, for material decomposition of spectral imaging projection data. The method comprises receiving (2) projection data acquired by a spectral imaging system and reducing (3) noise in the projection data by combining corresponding spectral values for different projection rays to obtain noise-reduced projection data. The method comprises applying (6) a first projection-domain material decomposition algorithm to the noise-reduced projection data to obtain a first set of material path length estimates, and applying (7) a second projection-domain material decomposition algorithm to the projection data to obtain a second set of material path length estimates. The second projection-domain material decomposition algorithm comprises an optimization that penalizes a deviation between the second set of material path length estimates being optimized and the first set of material path length estimates.