公开(公告)号：US11175418B2

公开(公告)日：2021-11-16

申请号：US16649416

申请日：2018-09-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Chuanyong Bai ,  Andriy Andreyev ,  Shushen Lin ,  Bin Zhang ,  Michael Allen Miller ,  Xiyun Song ,  Jinghan Ye ,  Shekhar Dwivedi ,  Zhiqiang Hu ,  Yu-Lung Hsieh ,  Ilya Brodskiy ,  Thomas Christopher Bulgrin ,  Yang-Ming Zhu ,  Douglas B. McKnight

IPC: G01T7/00 ,  A61B6/03 ,  G01T1/29 ,  A61B6/00 ,  G06T11/00

Abstract: A non-transitory computer-readable medium storing instructions readable and executable by a workstation (18) including at least one electronic processor (20) to perform a quality control (QC) method (100). The method includes: receiving a current QC data set acquired by a pixelated detector (14) and one or more prior QC data sets acquired by the pixelated detector; determining stability levels of detector pixels (16) of the pixelated detector over time from the current QC data set and the one or more prior QC data sets; labeling a detector pixel of the pixelated detector as dead when the stability level determined for the detector pixel is outside of a stability threshold range; and displaying, on a display device (24) operatively connected with the workstation, an identification (28) of the detector pixels labelled as dead.

公开(公告)号：US11798205B2

公开(公告)日：2023-10-24

申请号：US16959219

申请日：2019-01-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Chuanyong Bai ,  Andriy Andreyev ,  Bin Zhang ,  James Gurian ,  Zhiqiang Hu ,  Yu-Lung Hsieh ,  Shekhar Dwivedi ,  Jinghan Ye ,  Xiyun Song ,  Michael Allen Miller

IPC: G06T11/00 ,  G06T5/00 ,  G06T7/00

CPC classification number: G06T11/006 ,  G06T5/002 ,  G06T7/0012 ,  G06T2200/24 ,  G06T2207/10081 ,  G06T2207/30004

Abstract: A non-transitory computer-readable medium stores instructions readable and executable by a workstation (18) including at least one electronic processor (20) to perform an image reconstruction method (100). The method includes: determining a weighting parameter (13) of an edge-preserving regularization or penalty of a regularized image reconstruction of an image acquisition device (12) for an imaging data set obtained by the image acquisition device; determining an edge sensitivity parameter (γ) of the edge-preserving algorithm for the imaging data set obtained by the image acquisition device; and reconstructing the imaging data set obtained by the image acquisition device to generate a reconstructed image by applying the regularized image reconstruction including the edge-preserving regularization or penalty with the determined weighting and edge sensitivity parameters to the imaging data set obtained by the image acquisition device.

公开(公告)号：US10852448B2

公开(公告)日：2020-12-01

申请号：US16469605

申请日：2017-12-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Xiyun Song ,  Chuanyong Bai ,  Andriy Andreyev ,  Bin Zhang ,  Shushen Lin ,  Jinghan Ye ,  Michael Allen Miller ,  Zhiqiang Hu

IPC: A61B6/03 ,  G01T1/24 ,  G01T7/00 ,  G06T5/00 ,  G01T1/29 ,  A61B6/00

Abstract: A PET detector array (8) comprising detector pixels acquires PET detection counts along lines of response (LORs). The counts are reconstructed to generate a reconstructed PET image (36, 46). The reconstructing is corrected for missing LORs which are missing due to dead detector pixels of the PET detector array. The correction may be by estimating counts along the missing LORs (60) by interpolating counts along LORs (66) neighboring the missing LORs. The interpolation may be iterative to handle contiguous groups of missing detector pixels. The correction may be by computing a sensitivity matrix having matrix elements corresponding to image elements (80, 82) of the reconstructed PET image. In this case, each matrix element is computed as a summation over all LORs intersecting the corresponding image element excepting the missing LORs. The computed sensitivity matrix is used in the reconstructing.