公开(公告)号：US20200342639A1

公开(公告)日：2020-10-29

申请号：US15733084

申请日：2018-11-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： KEVIN MARTIN BROWN ,  THOMAS KOEHLER ,  ROLF DIETER BIPPUS

IPC: G06T11/00 ,  G06T15/08 ,  G01N23/046

Abstract: A system includes a single backprojector (120), which includes a single geometry calculator (204), at least one weight calculator (206), and a plurality of data interpolators (208). The single geometry calculator is configured to process scan parameters of a single computed tomography scan to generate geometry values only once for each voxel position in a volumetric image data matrix. The at least one weight calculator is configured to process the scan parameters of the single computed tomography scan and the geometry values to generate weight values for each voxel position in the volumetric image data matrix. Each of the plurality of data interpolators is configured to process, using the weight values and the same geometry values, a respective different type of projection data produced from the same single computed tomography scan to generate volumetric image data based on the volumetric image data matrix and corresponding to the respective different type of projection data.

公开(公告)号：US20230410264A1

公开(公告)日：2023-12-21

申请号：US18033882

申请日：2021-10-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF DIETER BIPPUS ,  THOMAS KOEHLER ,  KEVIN MARTIN BROWN

IPC: G06T5/00 ,  G06T5/50

CPC classification number: G06T5/005 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/10112 ,  G06T2207/30004

Abstract: The present invention relates to a method and a cone beam computed tomography apparatus for reducing artefacts in an image acquired with the cone beam computed tomography apparatus using a second pass artefact reduction method. Projection data of an object are acquired, wherein the projection data comprises a first subset of data to be used for reconstruction of a first image, and a second subset of data comprising projection data not to be used for the construction of the first image, wherein the second subset of data comprises projection data not comprised in the first subset of data. A first and a second image are reconstructed using the first and the second subset of data, respectively. A second pass artefact reduction method is performed using the second image as input image of the second pass artefact reduction method, thereby reducing artefacts in the first image.

公开(公告)号：US20200337668A1

公开(公告)日：2020-10-29

申请号：US16963270

申请日：2019-01-17

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： MICHAEL GRASS ,  ROLF DIETER BIPPUS ,  THOMAS KOEHLER ,  SANDRA SIMON HALLIBURTON

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/04

Abstract: A computed tomography imaging system (102) includes an X-ray radiation source (110) configured to emit X-ray radiation that traverses an examination region (108) and an X-ray radiation sensitive detector array (112) configured to detect X-ray radiation traversing the examination region and generate a view of line integrals. The imaging system further includes a subject support table top (118) configured to translate in the examination region for a scan based on at least one scan parameter. The imaging system further includes an operator console (122), which includes a processor (128) and computer readable storage medium (130) with a scan parameter adapter module (132). The processor is configured to execute instructions of the scan parameter adapter module, which causes the processor to determine a contrast agent concentration from the view of line integrals and adjust the at least one scan parameter based on the determined concentration.