公开(公告)号：US09761021B2

公开(公告)日：2017-09-12

申请号：US14397878

申请日：2013-05-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Bernhard Johannes Brendel ,  Ewald Roessl ,  Udo van Stevendaal

IPC: G06T11/00 ,  G01T1/29 ,  G01N23/20 ,  G01N23/201 ,  A61B6/00 ,  G01N21/88 ,  G01N23/04

CPC classification number: G06T11/005 ,  A61B6/42 ,  A61B6/48 ,  G01N23/046 ,  G01N23/20083 ,  G01N23/201 ,  G01N2021/8822 ,  G01N2021/8825 ,  G01N2223/054 ,  G01T1/2907 ,  G06T11/006 ,  G06T2207/10081

Abstract: A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.

公开(公告)号：US09625589B2

公开(公告)日：2017-04-18

申请号：US14421303

申请日：2013-07-15

Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS DEUTSCHLAND GMBH

Inventor： Ewald Roessl ,  Daerr Heiner ,  Roger Steadman Booker

IPC: H05G1/60 ,  G01T1/24 ,  G01N23/04

CPC classification number: G01T1/247 ,  G01N23/046 ,  G01T1/171 ,  G01T1/248

Abstract: The invention relates to a method and an X-ray detector (100) for detecting incident X-ray photons (X). The X-ray detector (100) comprises at least one sensor unit (105) in which X-ray photons (X) are converted into sensor signals (s) and at least one flux sensor (104) for generating a flux signal (f) related to the flux of photons (X). The sensor signals (s) are corrected based on the flux signal (f). In a preferred embodiment, the sensor signals (s) represent a spectrally resolved pulse counting. The flux sensor (104) may be integrated into an ASIC (103) that is coupled to the sensor unit (105).

公开(公告)号：US20150110346A1

公开(公告)日：2015-04-23

申请号：US14402121

申请日：2013-05-31

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Carsten Oliver Schirra ,  Ewald Roessl ,  Roland Proksa

IPC: A61B19/00 ,  G06T11/00 ,  G06T7/00

CPC classification number: A61B34/10 ,  A61B6/032 ,  A61B6/4042 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/488 ,  A61B6/504 ,  A61B6/507 ,  A61B6/5217 ,  A61B6/5235 ,  A61B2034/107 ,  F04C2270/041 ,  G06T7/0012 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/30101 ,  G06T2211/404

Abstract: A method includes obtaining first spectral image data, which includes at least a first component corresponding to a targeted first K-edge based contrast agent administered to a subject if a target of the targeted first K-edge based contrast agent is present in the subject, decomposing the first spectral image data into at least the first component, reconstructing the first component thereby generating a first image of the targeted first K-edge contrast agent, determining if the targeted first K-edge contrast agent is present in the first image, and generating a signal indicating the targeted first K-edge contrast agent is present in the first image in response to determining the targeted first K-edge contrast agent is present in the first image.

Abstract translation: 一种方法包括获取第一光谱图像数据，该第一光谱图像数据包括至少一个第一组分，所述第一组分对应于被施用于对象的目标第一K边缘造影剂，如果所述目标第一K边缘基础造影剂的目标存在于所述对象中， 将第一光谱图像数据分解成至少第一分量，重构第一分量，从而生成目标第一K边缘造影剂的第一图像，确定目标第一K边缘造影剂是否存在于第一图像中，以及 响应于确定目标的第一K边缘造影剂存在于第一图像中，产生指示目标的第一K边缘造影剂的信号存在于第一图像中。

公开(公告)号：US11448781B2

公开(公告)日：2022-09-20

申请号：US17263916

申请日：2019-08-01

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Ewald Roessl

IPC: G01T1/24 ,  G01T1/29

Abstract: The present invention relates to a photon counting detector comprising a first direct conversion layer (10) comprising a low-absorption direct conversion material (11) for converting impinging high-energy electromagnetic radiation (100) into a first count signal and first electrical contacts (12), a second direct conversion layer (20) comprising a high-absorption direct conversion material (21) for converting impinging high-energy electromagnetic radiation (100) into a second count signal and second electrical contacts (22), said high-absorption direct conversion material having a higher absorption than said low-absorption direct conversion material, and a carrier layer (30, 30a, 30b) comprising first and second terminals (31, 32) in contact with the first and second electrical contacts and processing circuitry (35) configured to correct, based on the first count signal, the second count signal for errors, wherein said first direct conversion layer and the second direct conversion layer are arranged such that the high-energy electromagnetic radiation transmits the first direct conversion layer before it hits the second direct conversion layer.

公开(公告)号：US11232881B2

公开(公告)日：2022-01-25

申请号：US16463150

申请日：2017-11-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Axel Thran ,  Heiner Daerr ,  Ewald Roessl ,  Gereon Vogtmeier

IPC: G01T1/16 ,  G21K1/02

Abstract: The present invention relates to an anti-scatter grid (ASG) assembly comprising a first and a second grid, wherein the second grid is arranged on top of the first grid and comprises a lateral shift. The lamella thickness of the first grid is smaller than the lamella thickness of the second grid. The present invention further relates to a detector arrangement comprising a pixel detector and an ASG assembly arranged on top of the pixel detector.

公开(公告)号：US11178346B2

公开(公告)日：2021-11-16

申请号：US16960787

申请日：2019-01-08

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Ewald Roessl

IPC: H04N5/32 ,  A61B6/00 ,  G01N23/046

Abstract: A signal processing system (SPS) and related method. The system comprises an input interface (IN) for receiving at least two data sets, comprising a first data set and second data set. The first data set is generated by an X-ray detector sub-system (XDS) at a first pixel size and the second data set generated at a second pixel size different from the first pixel size. An estimator (EST) is configured to compute, based on the two data sets, an estimate of a charge sharing impact.

公开(公告)号：US11029425B2

公开(公告)日：2021-06-08

申请号：US16305425

申请日：2017-06-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roger Steadman Booker ,  Ewald Roessl

IPC: G01T1/24 ,  G01T1/17

Abstract: The invention relates to radiation detector for registering incident photons, comprising (i) detection circuitry (202, 206, 207) configured to provide an electric output signal in response to incident photons, the output signal comprising pulses having an amplitude indicative of energies deposited in the radiation detector by the incident photons, and (ii) an energy estimating circuit (2081, . . . , 208N; 2091, . . . , 209N) configured to detect that the output signal is larger than at least one threshold corresponding to an energy value in order to determine energies of incident photons. The radiation detector further comprises a registration circuit (211) configured to detect incident photons independent of a comparison of the output signal with the at least one threshold. Moreover, the invention relates to a method for detecting photons using the radiation detector.

公开(公告)号：US10929974B2

公开(公告)日：2021-02-23

申请号：US16301477

申请日：2017-06-14

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Dirk Schaefer ,  Heiner Daerr ,  Thomas Koehler ,  Ewald Roessl

IPC: G06K9/00 ,  G06T7/00 ,  G16H30/40 ,  G06T11/00 ,  A61B5/02

Abstract: Present invention relates to devices and methods for determining a calcium content by analyzing cardiac spectral CT data. CT projection data (9), obtainable by scanning a cardiac region of a subject using a spectral CT scanning unit, is modelled (12) by applying a material decomposition algorithm to the projection data to provide a calcium-specific component. Tomographic reconstructions (13) of the projection data, to provide a first 3D image (8), and of the calcium-specific component, to provide a second 3D image (6), are performed. The first 3D image (8) is segmented (14) to provide an image mask (5) corresponding to a cardiovascular structure of interest, a part of the second 3D image (6) is selected (15) based on the image mask (5), and a calcium content is calculated (16) in the cardiovascular structure of interest based on the selected part of the second 3D image (6).

公开(公告)号：US10458926B2

公开(公告)日：2019-10-29

申请号：US15311886

申请日：2015-05-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Udo Van Stevendaal ,  Heiner Daerr ,  Thomas Koehler ,  Gerhard Martens ,  Ewald Roessl

IPC: G01N23/00 ,  G01N23/04 ,  A61B6/00 ,  G01N23/041

Abstract: A phantom body (PB) for use in a differential phase contrast imaging apparatus (IM) for calibration of same. The phantom body (PB) allows for simultaneous calibration of three different image signal channels, namely refraction, phase shift and small angle scattering.

公开(公告)号：US10420521B2

公开(公告)日：2019-09-24

申请号：US15328086

申请日：2015-07-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Ewald Roessl ,  Thomas Koehler ,  Hans-Aloys Wischmann

IPC: A61B6/00 ,  G21K1/06 ,  G21K1/10 ,  A61B6/06 ,  G21K1/02 ,  A61B6/03 ,  G01N23/20

Abstract: The grating device (1) for an X-ray imaging device comprises a grating arrangement (10) and an actuation arrangement (20). The grating arrangement (10) comprises a plurality of grating segments (11). The actuation arrangement (20) is configured to move the plurality of grating segments (11) with at least a rotational component between a first position and a second position. In the first position, the grating segments (11) are arranged in the path of an X-ray beam (30), so that the grating segments (11) influence portions of the X-ray beam (30). In the second position, the grating segments (11) are arranged outside the portions of the path of an X-ray beam (30), so that the portions of the X-ray beam (30) are unaffected by the grating segments (11).