公开(公告)号：US10973483B2

公开(公告)日：2021-04-13

申请号：US16329792

申请日：2017-09-07

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler

IPC: A61B6/00 ,  G06T11/00 ,  A61B6/03

Abstract: A system and related method for signal processing. Interferometric projection data reconstructed into one or more images for a spatial distribution of a physical property of an imaged object. The interferometric projection data is derived from signals acquired by an X-ray detector (D), said signals caused by X-ray radiation after interaction of said X-ray radiation with an interferometer and with the object (OB) to be imaged, said interferometer (IF) having an inter-grating distance. The reconstructor (RECON) configured to perform, based on the projection data and a forward signal model, a reconstruction operation for one or more images in an image domain of a spatial distribution of at least one physical property of said object (OB) including a refractive index, wherein the reconstructor is configured to perform in the reconstruction operation a scaling operation based on the inter-grating distance of the interferometer and/or on a distance of a location in said image domain from said interferometer (IF).

公开(公告)号：US10902648B2

公开(公告)日：2021-01-26

申请号：US15736975

申请日：2016-06-27

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Bernhard Johannes Brendel ,  Peter Noel ,  Franz Pfeiffer ,  Maximilian Von Teuffenbach

IPC: G06T11/00 ,  A61B6/00

Abstract: A system and related method for signal processing. Interferometric projection data reconstructed into one or more images for a spatial distribution of a physical property of an imaged object. The interferometric projection data is derived from signals acquired by an X-ray detector (D), said signals caused by X-ray radiation after interaction of said X-ray radiation with an interferometer and with the object (OB) to be imaged, said interferometer (IF) having a reference phase. A reconstructor (RECON) reconstructs for the image(s) by fitting said data to a signal model by adapting fitting variables, said fitting variables including i) one or more imaging variables for the one or more images and ii), in addition to said one or more imaging variables, a dedicated phase variable for a fluctuation of said reference phase.

公开(公告)号：US10758202B2

公开(公告)日：2020-09-01

申请号：US15758367

申请日：2016-09-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Heiner Daerr ,  Thomas Koehler

IPC: A61B6/00 ,  A61B6/03 ,  G09B23/28 ,  G09B23/30

Abstract: The present invention is directed towards spectral imaging, wherein a dedicated spectral imaging phantom is scanned with a spectral x-ray device to obtain spectral imaging data of the spectral imaging phantom. Said imaging data of the spectral imaging phantom is used as input for obtaining improved further imaging data of a subject of which a spectral scan is performed subsequent to or simultaneous with the spectral scan of the spectral imaging phantom. Improved further imaging data may be obtained by using the spectral phantom imaging data as input for imaging data correction, for providing a recommendation and/or for further data processing.

公开(公告)号：US10426417B2

公开(公告)日：2019-10-01

申请号：US15301513

申请日：2015-06-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Grass ,  Thomas Koehler ,  Roland Proksa

IPC: A61B6/00 ,  A61B6/03

Abstract: An imaging system (200) includes a radiation source (208) that emits radiation that traverses an examination region. The imaging system further includes a hybrid data acquisition system (212) that receives radiation that traverses the examination region. The hybrid data acquisition system includes a phase-contrast sub-portion (304) spanning a sub-portion of a full field of view. The hybrid data acquisition system further includes at least one of an integrating portion (302, 702, 804, 806, 902) or a spectral portion (402, 704, 706, 802, 1002) spanning the full field of view. The hybrid data acquisition system generates a phase-contrast signal and at least one of an integration signal or a spectral signal. The imaging system further includes a reconstructor (216) that reconstructs the phase-contrast signal and at least one of the integration single or the spectral signal to generate volumetric image data indicative of the examination region.

公开(公告)号：US10223815B2

公开(公告)日：2019-03-05

申请号：US15326506

申请日：2015-07-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Ewald Roessl ,  Thomas Koehler

IPC: G06K9/00 ,  G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G01N23/20

Abstract: A system and related method for X-ray phase contrast imaging. A signal model is fitted to interferometric measurment data. The fitting operation yields a Compton cross section and a photo-electric image. A pro-portionality between the Compton cross section and electron-density is used to achieve a reduction of the number of fitting variables. The Compton image may be taken, up to a constant, as a phase contrast images.

公开(公告)号：US10219772B2

公开(公告)日：2019-03-05

申请号：US15547531

申请日：2016-12-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Grass ,  Thomas Koehler

IPC: A61B5/00 ,  A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  G01T1/29 ,  G06T11/00

Abstract: The invention relates to tomographic imaging device (1). The device (1) comprises a radiation detector (3) for measuring radiation traveling through an object to be imaged, the radiation detector (3) being configured to measure radiation only at a plurality of selected sampling positions on a curved track around an axis (z). A planning unit (12) is configured to determine the selected sampling positions on the basis of an estimated contour (44; 53) of the object (21) in a plane (x-y) substantially perpendicular to the axis (z). Further, the invention relates to a method for operating the device (1). The invention is particularly applicable in computed tomography imaging.

公开(公告)号：US09782138B2

公开(公告)日：2017-10-10

申请号：US15036521

申请日：2015-09-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Roland Proksa ,  Bernhard Johannes Brendel ,  Ewald Roessl

IPC: A61B6/00 ,  A61B6/03 ,  G21K1/02

CPC classification number: A61B6/4291 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/54 ,  A61B6/542 ,  G21K1/025

Abstract: An imaging apparatus comprising a radiation source (2) for emitting radiation from a focal region (20) through an imaging area (5), a detection unit (6) for detecting radiation from said imaging area (5), said detection unit comprising an anti-scatter grid (62) and a detector (61), a gantry (1) to which said radiation source (2) and said detection unit (6) are mounted and a controller (9) for controlling said detection unit (6) to detect radiation at a plurality of projection positions and for manipulating the position, setting and/or orientation of at least a part of said radiation source (2) and/or said detection unit (6) at first projection positions (80) so that the radiation incident on the detector (61) at said first projection positions is attenuated by said anti-scatter grid (62) to a larger extent compared to second projection positions (80) representing the remaining projection positions.

公开(公告)号：US09761024B1

公开(公告)日：2017-09-12

申请号：US15518582

申请日：2015-10-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa ,  Thomas Koehler

IPC: G06K9/00 ,  A61B6/00 ,  G06T11/00

CPC classification number: G06T11/006 ,  G06T2211/408 ,  G06T2211/424

Abstract: A computing system (116) includes a reconstruction processor (114) configured to execute computer readable instructions, which cause the reconstruction processor to: receive, in electronic format, non-spectral projection data, reconstruct the non-spectral projection data to generate a non-spectral image, retrieve a non-spectral to spectral voxel value map for a basis material of interest from a set of non-spectral to spectral voxel value maps, generate a spectral iterative reconstruction start image based on the non-spectral image and the non-spectral to spectral voxel value map, and reconstruct a spectral image, in electronic format, for the material basis of interest from the non-spectral projection data with a spectral iterative reconstruction algorithm and the spectral iterative reconstruction start image.

公开(公告)号：US09076191B2

公开(公告)日：2015-07-07

申请号：US14364715

申请日：2012-12-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Frank Bergner ,  Bernhard Johannes Brendel ,  Thomas Koehler

IPC: G06T5/00 ,  G06T11/00

CPC classification number: G06T5/00 ,  G06T11/006 ,  G06T2207/20004 ,  G06T2211/424

Abstract: A processing component (122) processes images based on an iterative reconstruction algorithm with regularization and/or de-noising algorithm. The processing component includes a set point determiner (224) that determines a quality set point (216) between predetermined lower and upper quality bounds (226) based on a quality variable (228) indicative of an image quality of interest. The processing component further includes a comparator (214) that compares, each processing iteration, a quality metric of a current generated image with the quality set point and generates a difference value indicative of a difference between the quality metric and the quality set point. The processing component further includes a regularization factor updater (220) that generates an updated regularization factor for a next processing iteration based on a current value (222) of the regularization factor and at least the quality metric in response to the difference value indicating that the quality metric is outside of a predetermined range about the quality set point.

Abstract translation: 处理组件（122）基于具有正则化和/或去噪算法的迭代重建算法处理图像。 处理组件包括基于指示感兴趣的图像质量的质量变量（228）确定预定的下限和上限质量界限（226）之间的质量设定点（216）的设定点确定器（224）。 处理组件还包括比较器（214），其将每个处理迭代将当前生成的图像的质量度量与质量设定点进行比较，并产生指示质量度量和质量设定点之间的差的差值。 处理组件还包括正则化因子更新器（220），其基于正则化因子的当前值（222）生成用于下一个处理迭代的更新的正则化因子，并且至少响应于指示所述正则化因子的差值的质量度量 质量度量关于质量设定点超出预定范围。

公开(公告)号：US20150038839A1

公开(公告)日：2015-02-05

申请号：US14378179

申请日：2013-02-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Dirk Schaefer ,  Axel Thran ,  Thomas Koehler

IPC: A61B6/00 ,  A61B5/00

CPC classification number: A61B6/5205 ,  A61B5/0075 ,  A61B6/42 ,  G01T1/2008 ,  G01T1/2985

Abstract: An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.

Abstract translation: 一种成像系统包括：辐射源（106），其辐射穿过检查区域和被检体的一部分的辐射;以及检测器阵列（114），其检测穿过检查区域和被检体的部分的辐射，并产生信号 指示。 卷扫描参数推荐器（120）基于由辐射源和检测器阵列获取的第一和第二2D投影的光谱分解，推荐对于对象部分的体扫描的至少一个光谱扫描参数值。 第一和第二2D投影具有不同的光谱特征。 控制台（122）采用推荐的至少一个光谱扫描参数值来对被摄体的部分进行体积扫描。