公开(公告)号：US11116465B2

公开(公告)日：2021-09-14

申请号：US15756602

申请日：2016-09-01

Applicant: KONINKLIJKE PHILIPS N.V. ,  TECHNISCHE UNIVERSITAET MUENCHEN

Inventor： Roland Proksa ,  Alexander André Fingerle ,  Daniela Muenzel ,  Franz Josef Pfeiffer ,  Thomas Koehler ,  Peter Benjamin Theodor Noel ,  Maximilian Von Teuffenbach ,  Julia Herzen ,  Konstantin Willer

IPC: A61B6/00 ,  A61B6/03

Abstract: A method of a virtual X-ray colonoscopy includes scanning (204) a dark-field contrast (144) insufflated colon lumen (140) with an X-ray scanner (110) configured for dark-field-contrast, which generates dark-field-contrasted projection data and attenuation projection data. The dark-field-contrasted projection data and the attenuation projection data are reconstructed (206) into one or more dark-field-contrasted images (148).

公开(公告)号：US10945690B2

公开(公告)日：2021-03-16

申请号：US15738324

申请日：2016-06-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Gerhard Martens ,  Roland Proksa ,  Hanns-Ingo Maack ,  Udo Van Stevendaal ,  Franz Josef Pfeiffer ,  Peter Benjamin Theodor Noel ,  Maximilian Von Teuffenbach

IPC: G03H5/00 ,  A61B6/00

Abstract: An X-ray imaging apparatus with an interferometer (IF) and an X-ray detector (D). A footprint of the X-ray detector (D) is larger than a footprint of the interferometer (IF). The interferometer is moved in scan motion across the detector (D) whilst the detector (D) remains stationary. Preferably the detector is a 2D full field detector.

公开(公告)号：US10736590B2

公开(公告)日：2020-08-11

申请号：US15509042

申请日：2015-09-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Dirk Schafer ,  Michael Grass ,  Thomas Koehler ,  Roland Proksa

IPC: A61B6/03 ,  A61B6/00 ,  G01N23/046

Abstract: A method includes receiving radiation with a hybrid data detection system of an imaging system. The hybrid data detection system includes a hybrid data detector array with a set of spectral detectors and a set of integrating detectors that are arranged along a transverse axis of an examination region. The method further includes generating a set of truncated spectral projections with the first set of spectral detectors. The method further includes estimating a set of spectral projections for the integrating detectors. The method further includes combining the set of truncated spectral projections and the estimated set of spectral projections. The method further includes estimating a set of spectral projections based on the combined set to produce a complete set of spectral projections. The method further includes processing the complete set of spectral projections to generate volumetric image data.

公开(公告)号：US10441230B2

公开(公告)日：2019-10-15

申请号：US15325158

申请日：2015-07-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa ,  Michael Grass

IPC: A61B6/00 ,  A61B6/06 ,  A61B6/03 ,  G01N23/046

Abstract: The invention relates to a projection data acquisition apparatus (31) for acquiring projection data. The projection data acquisition apparatus comprises a radiation device (32) for generating a pulsed radiation beam (4) for traversing an object and a detection device (6) for generating projection data being indicative of the pulsed radiation beam (4) at different acquisition positions, wherein the radiation device (32) is adapted to generate the pulsed radiation beam (4) such that at different acquisition positions the pulsed radiation beam (4) has different shapes, i.e. is differently blocked and/or attenuated. Thus, not the complete radiation providable by the radiation device is used at each acquisition position, but at least at some acquisition positions only a smaller pulsed radiation beam is used. This can lead to less scattered radiation and hence to improved projection data and an improved computed tomography image, which may be reconstructed based on the acquired projection data.

公开(公告)号：US10420519B2

公开(公告)日：2019-09-24

申请号：US15523690

申请日：2015-11-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Roland Proksa ,  Michael Grass

IPC: G06K9/00 ,  A61B6/03 ,  A61B6/02 ,  A61B6/00

Abstract: The invention relates to a computed tomography system (30). Several sets of spectral projections, which correspond to different positions of a radiation source (2) along a rotation axis (R), are decomposed into first projections being indicative of a contrast agent and second projections being not indicative of the contrast agent. An image is generated by a) determining for each first projection a contrast value being indicative of a total amount of contrast agent and scaling the first projections such that for different first projections of a same set the same contrast value is determined, and reconstructing an image based on the scaled first projections, and/or b) reconstructing for the different sets first images, scaling the first images such that they have a same intensity in overlap regions and combining the scaled first images. Thus, different contrast agent amounts can be balanced, thereby allowing for an improved image quality.

公开(公告)号：US09980686B2

公开(公告)日：2018-05-29

申请号：US14905890

申请日：2014-07-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa

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

CPC classification number: A61B6/4241 ,  A61B6/032 ,  A61B6/4064 ,  A61B6/4078 ,  A61B6/4085 ,  A61B6/4233 ,  A61B6/482 ,  A61B6/5205 ,  A61B6/5235 ,  A61B6/5258 ,  G01T1/2985 ,  G06T11/003 ,  G06T11/006 ,  G06T2211/408 ,  G06T2211/424

Abstract: An imaging system (100) includes a detector array (110) that detects radiation traversing an examination region. The detector array includes at least a set of non-spectral detectors (112) that detects a first sub-portion of the radiation traversing the examination region and generates first signals indicative thereof. The detector array further includes at least a set of spectral detectors (114) that detects a second sub-portion of the radiation traversing the examination region and generates second signals indicative thereof. The imaging system further includes a reconstructor (120) that processes the first and second signals, generating volumetric image data.

公开(公告)号：US09761023B1

公开(公告)日：2017-09-12

申请号：US14917615

申请日：2015-07-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Koehler ,  Frank Bergner ,  Roland Proksa

IPC: G06T11/00

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

Abstract: The present invention relates to a device (100) for iterative reconstruction of images recorded by at least two imaging methods, the device comprising: an extraction module (10), which is configured to extract a first set of patches from a first image recorded by a first imaging method and to extract a second set of patches from a second image recorded by a second imaging method; a generation module (20), which is configured to generate a set of reference patches based on a merging of a first limited number of atoms for the first set of patches and of a second limited number of atoms for the second set of patches; and a regularization module (30), which is configured to perform a regularization of the first image or the second image by means of the generated set of reference patches.

公开(公告)号：US09655583B2

公开(公告)日：2017-05-23

申请号：US15334345

申请日：2016-10-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa

IPC: H01J35/08 ,  A61B6/06 ,  A61B6/00 ,  G01T1/24 ,  H01J35/10 ,  G21K1/04

CPC classification number: A61B6/54 ,  A61B6/4028 ,  A61B6/4035 ,  A61B6/42 ,  A61B6/4476 ,  G01T1/24 ,  G21K1/043 ,  H01J35/10 ,  H01J2235/086

Abstract: The present invention relates to a radiographic imaging apparatus and a corresponding radiographic imaging method. The proposed apparatus comprises an X-ray source and a photon counting X-ray detector. The X-ray source comprises a rotary X-ray anode having a number of radial slits and a target layer provided on a surface of said rotary X-ray anode in between said radial slits for emitting X-ray radiation when hit by said electron beam. The said photon counting X-ray detector comprises a persistent current sensing and correction unit for sensing a persistent output current in a blanking interval during which no X-ray radiation is emitted by said X-ray source and for using the sensed persistent output current to correct a detector signal in a subsequent measurement interval during which X-ray radiation is emitted by said X-ray source.

公开(公告)号：US09423514B2

公开(公告)日：2016-08-23

申请号：US14359311

申请日：2012-11-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Ewald Roessl ,  Axel Thran ,  Roland Proksa

IPC: G01T1/20

CPC classification number: G01T1/20 ,  G01T1/2008

Abstract: Detection apparatus for detecting radiation The invention relates to a detection apparatus for detecting radiation. The detection apparatus comprises at least two scintillators (14, 15) having different temporal behaviors, each generating scintillation light upon reception of radiation, wherein the generated scintillation light is commonly detected by a scintillation light detection unit (16), thereby generating a common light detection signal. A detection values determining unit determines first detection values by applying a first determination process and second detection values by applying a second determination process, which is different to the first determination process, on the detection signal. The first determination process includes frequency filtering the detection signal. Since the scintillation light of the different scintilla-tors is collectively detected by the same scintillation light detection unit, detection arrangements with, for example, side-looking photodiodes for separately detecting the different scintillation light of the different scintillators are not necessarily required, thereby reducing the technical complexity of the detection apparatus.

Abstract translation: 用于检测辐射的检测装置技术领域本发明涉及一种用于检测辐射的检测装置。 检测装置包括具有不同时间行为的至少两个闪烁体（14,15），每个闪烁体在接收到辐射时产生闪烁光，其中所产生的闪烁光通常由闪烁光检测单元（16）检测，从而产生公共光 检测信号。 检测值确定单元通过对检测信号应用与第一确定处理不同的第二确定处理来应用第一确定处理和第二检测值来确定第一检测值。 第一确定处理包括对检测信号进行频率滤波。 由于不同的闪烁体的闪烁光被同一个闪烁光检测部共同检测，所以不一定需要与例如用于分别检测不同的闪烁体的不同的闪烁体的侧视光电二极管的检测装置，从而减少 检测装置的技术复杂性。

公开(公告)号：US09291724B2

公开(公告)日：2016-03-22

申请号：US14363451

申请日：2012-12-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Roland Proksa

IPC: G01T1/24 ,  G01T1/17

CPC classification number: G01T1/17 ,  G01T1/24 ,  G01T1/247 ,  G01T1/249

Abstract: An imaging system (100) includes a direct conversion detector pixel (111) that detects radiation traversing an examination region and generates an electrical signal indicative thereof, wherein the signal includes a persistent current, which is produced by a direct conversion material of the pixel and which shifts a level of the signal. A persistent current estimator (116) estimates the persistent current and generates a compensation signal based on the estimate. A pre-amplifier (112) receives the signal and the compensation signal, wherein the compensation signal substantially cancels the persistent current, producing a persistent current compensated signal, and that amplifies the compensated signal, generating an amplified compensated signal. A shaper (114) generates a pulse indicative of energy of the radiation illuminating the direct conversion material based on the amplified compensated signal.

Abstract translation: 成像系统（100）包括直接转换检测器像素（111），其检测穿过检查区域的辐射，并产生指示其的电信号，其中该信号包括由像素的直接转换材料产生的持续电流，以及 这会转移信号的电平。 持续电流估计器（116）估计持续电流并且基于估计产生补偿信号。 前置放大器（112）接收信号和补偿信号，其中补偿信号基本上抵消持续电流，产生持续电流补偿信号，并放大补偿信号，产生放大的补偿信号。 整形器（114）基于放大的补偿信号产生指示照射直接转换材料的辐射的能量的脉冲。