公开(公告)号：US20220406555A1

公开(公告)日：2022-12-22

申请号：US17776407

申请日：2020-11-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF KARL OTTO BEHLING ,  ROLAND PROKSA ,  BERNHARD GLEICH ,  BERND RUDI DAVID ,  CLAAS BONTUS ,  TOBIAS REUSCH ,  AXEL THRAN

IPC: H01J35/04 ,  H01J35/10 ,  H01J35/06 ,  H05G1/08 ,  H05G1/70

Abstract: The present invention relates to a rotary anode X-ray source. In addition to a primary cathode of a rotary anode X-ray tube, an auxiliary cathode is provided in the rotary anode X-ray tube. Electrons from the auxiliary cathode are focused into an area on the anode, from which X-rays cannot enter the used X-ray beam generated by the primary cathode. An emission current controlling device is used to control the electron emission of the auxiliary cathode. Thus, the voltage down-ramp for dual energy scanning is kept constant even though the primary X-ray output changes for the sake of dose modulation or during a transient of the primary electron current.

公开(公告)号：US20190116654A1

公开(公告)日：2019-04-18

申请号：US16086440

申请日：2017-03-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： LESTER DONALD MILLER ,  NIRMAL SONI ,  ROLF KARL OTTO BEHLING ,  ROLAND PROKSA ,  DIONYS VAN DE VEN

IPC: H05G1/32 ,  H05G1/58 ,  H01J35/04 ,  H01J35/06 ,  H01J35/10

Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (40) at least two voltages between at least one cathode (20) and an anode (30), wherein the at least two voltages comprises a first voltage and a second voltage. The at least one cathode is positioned relative to the anode. Electrons are emitted (220) from the at least one cathode. Electrons emitted from the at least one cathode are interacted (230) with the anode with energies corresponding to the at least two voltages. X-rays are generated (230) from the anode, wherein the electrons interact with the anode to generate the X-rays. First X-rays are generated when the power supply produces the first voltage and second X-rays are generated when the power supply produces the second voltage. The power supply is controlled (250), such that a ratio between the first X-rays and the second X-rays is controllable.

公开(公告)号：US20200154553A1

公开(公告)日：2020-05-14

申请号：US16612783

申请日：2018-05-30

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ANAND KUMAR DOKANIA ,  ROLF KARL OTTO BEHLING

IPC: H05G1/52 ,  H01J35/06 ,  H01J35/08 ,  H05G1/32

Abstract: The present invention relates to an apparatus (10) for generating X-rays. It is described to produce (210) with at least one power supply (40) a voltage between a cathode (20) and an anode (30). The cathode is positioned relative to the anode, and the cathode and anode are operable such that electrons emitted from the cathode interact with the anode with energies corresponding to the voltage, and wherein the electrons interact with the anode at a focal spot to generate X-rays. The at least one power supply provides (220) the cathode with a cathode current. An electron detector (50) is positioned (230) relative to the anode, and a backscatter electron signal is measured (240) from the anode. The measured backscatter electron signal is provided (250) to a processing unit (60). The processing unit determines (260) a cathode current correction and/or a correction to the voltage between the cathode and the anode, wherein the determination comprises utilization of the measured backscatter electron signal and a correlation between anode surface roughness and backscatter electron emission. The cathode current correction and/or the correction to the voltage between the cathode and the anode is provided (270) to the at least one power supply.

公开(公告)号：US20170319149A1

公开(公告)日：2017-11-09

申请号：US15524112

申请日：2015-11-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： THOMAS KOEHLER ,  EWALD ROESSL ,  ROLF KARL OTTO BEHLING ,  PETER BENJAMIN THEODOR NOEL ,  FRANZ PFEIFFER

IPC: A61B6/03 ,  G02B5/18 ,  H01J35/14 ,  A61B6/00

CPC classification number: A61B6/032 ,  A61B6/4035 ,  A61B6/4085 ,  A61B6/484 ,  G02B5/1866 ,  G21K2207/005 ,  H01J35/14 ,  H01J2235/082 ,  H01J2235/086

Abstract: The invention relates to a source-detector arrangement (11) of an X-ray apparatus (10) for grating based phase contrast computed tomography. The source-detector arrangement comprises an X-ray source (12) adapted for rotational movement around a rotation axis (R) relative to an object (140) and adapted for emittance of an X-ray beam of coherent or quasi-coherent radiation in a line pattern (21); and an X-ray detection system (16) including a first grating element (24) and a second grating element (26) and a detector element (6); wherein the line pattern of the radiation and a grating direction of the grating elements are arranged orthogonal to the rotation axis; and wherein the first grating element has a first grating pitch varied dependent on a cone angle (β) of the X-ray beam and/or the second grating element has a second grating pitch varied dependent on the cone angle of the X-ray beam.

公开(公告)号：US20210356608A1

公开(公告)日：2021-11-18

申请号：US17274258

申请日：2019-09-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： JOHANNES WILHELMUS MARIA JACOBS ,  ROLF KARL OTTO BEHLING ,  ROGER STEADMAN BOOKER ,  GEREON VOGTMEIER ,  ONNO JAN WIMMERS

IPC: G01T1/20 ,  G01T1/24 ,  H01L25/04 ,  H01L31/0256

Abstract: The present invention relates to a radiation detector (100) comprising: i) a substrate (110); ii) a sensor, which is coupled to the substrate, the sensor comprising a first array (120) of sensor pixels, a second array (130) of signal read-out elements, and an electronic circuitry which is configured to provide image data based on signals received from the signal read-out elements; iii) a transducer, which is coupled to the substrate and to the sensor, the transducer comprising a third array (140) of subpixels, wherein at least two subpixels are assigned to one sensor pixel; wherein the second array of signal read-out elements and the third array of subpixels correspond to each other; wherein each of the subpixels comprises a radiation conversion material.

公开(公告)号：US20160172148A1

公开(公告)日：2016-06-16

申请号：US14905874

申请日：2014-07-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF KARL OTTO BEHLING

IPC: H01J35/10 ,  G21K1/02

CPC classification number: H01J35/10 ,  G21K1/02 ,  G21K2207/005 ,  H01J2235/086

Abstract: A differential phase contrast imaging (DPCI) apparatus and an anode for an X-ray tube of such DPCI apparatus are proposed. The anode (39) comprises a rotatable anode disk (41) with a focal track region (51) close to a circumference (59) thereof. Upon impact of accelerated electrons, an X-ray (5) is emitted from a focal spot (53). The anode (39) further comprises a ring-like modulating absorption grid (55) fixedly connected to the anode disk (41). This modulating absorption grid (55) comprises wall portions (57) of an X-ray absorbing material and slits (67) between neighboring wall portions (57). Spacings between neighboring slits (67) are smaller than a width wf of the focal spot (53), for example smaller than 100 μm, preferable less than 20 μm, and the slits (67) have a width of less than 50 μm, preferably less than 10 μm. Upon rotation of the anode (39), the modulating absorption grid (55) may serve as a source grid in the DPCI apparatus, such that the generated electron beam (5) is periodically modulated. Accordingly, in such DPCI apparatus, a phase-shift grid and a phase analyzer grid may be stationary thereby avoiding a risk of positioning inaccuracies e.g. upon moving of the components of the DPCI apparatus during X-ray imaging.

Abstract translation: 提出了一种差分相位成像（DPCI）装置和这种DPCI装置的X射线管的阳极。 阳极（39）包括具有靠近其圆周（59）的焦点轨迹区域（51）的可旋转阳极盘（41）。 在加速电子撞击时，从焦点（53）发射X射线（5）。 阳极（39）还包括固定地连接到阳极盘（41）的环状调节吸收栅（55）。 该调制吸收栅格55包括X射线吸收材料的壁部分57和相邻的壁部分57之间的狭缝67。 相邻狭缝（67）之间的间隔小于焦点（53）的宽度wf，例如小于100μm，优选小于20μm，狭缝（67）的宽度小于50μm，优选 小于10μm。 在阳极（39）旋转时，调制吸收栅格（55）可以用作DPCI装置中的源栅极，使得所产生的电子束（5）被周期性地调制。 因此，在这种DPCI设备中，相移网格和相位分析器网格可以是固定的，从而避免定位不准确的风险，例如， 在X射线成像期间移动DPCI装置的部件。

公开(公告)号：US20180270939A1

公开(公告)日：2018-09-20

申请号：US15779105

申请日：2016-11-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLAND PROKSA ,  ROLF KARL OTTO BEHLING ,  CAROLINA RIBBING ,  LESTER DONALD MILLER ,  ALEXANDER EITEL

IPC: H05G1/54 ,  A61B6/00

Abstract: The present invention relates to a device (34) and a method (70) for determining a status of an X-ray tube (10) of an X-ray system (36). Due to ageing and/or wear of the X-ray tube, the spectrum of the X-ray radiation (30) provided by the X-ray tube may change over the operation time of the X-ray tube. The present invention therefore suggests evaluating spectrally different values detected with an X-ray detector arrangement (32) of the X-ray system. A reference data set representing a reference condition of the X-ray tube by a plurality of spectrally different reference-values (44) and a working data set representing an aged condition of the X-ray tube by a plurality of spectrally different working-values (46) of detected X-ray radiation are used to determine an equivalent filtration function for an filtration material influencing a source X-ray radiation (26) emitted by an anode (16) of the X-ray tube. Accordingly, the filtration function provides the information about the material being used for the filtration and/or its length, which may provide the basis to determine the condition and thus the status of the X-ray tube.

公开(公告)号：US20170301503A1

公开(公告)日：2017-10-19

申请号：US15516936

申请日：2015-09-30

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF KARL OTTO BEHLING ,  EWALD ROESSL

IPC: H01J35/10 ,  H01J35/06 ,  H01J35/14

CPC classification number: H01J35/10 ,  H01J35/06 ,  H01J35/14 ,  H01J35/24 ,  H01J2235/086

Abstract: The invention relates to a modification arrangement for an X-ray generating device, a modification method, a computer program element for controlling such device and a computer readable medium having stored such computer program element. The modification arrangement comprises a cathode, an anode (2) and modification means, e.g. a modification device. The cathode is configured to provide an electron beam (15). The anode (2) is configured to rotate under impact of the electron beam (15) and is segmented by slits (21) arranged around the anode's circumference. The modification means are configured to modify the electron beam (15) when the electron beam (15) is hitting one of the anode's rotating slits (21).

公开(公告)号：US20160270198A1

公开(公告)日：2016-09-15

申请号：US15033994

申请日：2014-10-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF KARL OTTO BEHLING

IPC: H05G1/30 ,  G01N23/04 ,  G21K1/10

CPC classification number: H05G1/30 ,  A61B6/484 ,  G01N23/04 ,  G21K1/02 ,  G21K1/10 ,  H05G1/00

Abstract: An X-ray imaging device (1) and methods for operating such device are presented. In an embodiment, the device (1) comprises an X-ray source (5), an arrangement (12) of a first grating (13), a second grating (15) and a third grating (17), an X-ray detector (7) and a control device (21). The first, second and third gratings (13, 15, 17) are arranged in a beam path (9) of X-rays in a region upstream of an observation volume (3). At least one of the second and third gratings (15, 17) comprises a multiplicity of sub-gratings wherein each of the sub-gratings comprises a steering means (39) for displacing the subgrating with respect to the other one of the second and third gratings. The control device (21) is adapted to controlling the steering means (39). Accordingly, sub-gratings may be positioned such that intensity maxima of an interference pattern generated upon transmission of X-rays through the second grating (15) are either arranged such as to coincide with strongly X-ray absorbing portions of the third grating (17) or to coincide with weakly X-ray absorbing portions in the third grating (17). Accordingly, X-ray transmission through the arrangement (12) may be locally adapted by specifically positioning each of the sub-gratings.

Abstract translation: 介绍了一种X射线成像装置（1）及其操作方法。 在一个实施例中，装置（1）包括X射线源（5），第一光栅（13），第二光栅（15）和第三光栅（17）的布置（12），X射线 检测器（7）和控制装置（21）。 第一，第二和第三光栅（13,15,17）被布置在观察体积（3）的上游区域中的X射线的光束路径（9）中。 第二和第三光栅（15,17）中的至少一个包括多个子光栅，其中每个子光栅包括转向装置（39），用于相对于第二和第三光栅中的另一个移位子格栅 光栅。 控制装置（21）适于控制转向装置（39）。 因此，可以将子光栅定位成使得通过第二光栅（15）透射X射线时产生的干涉图案的强度最大值被布置成与第三光栅（17）的强X射线吸收部分重合 ）或与第三光栅（17）中的弱X射线吸收部分重合。 因此，通过布置（12）的X射线透射可以通过专门定位每个子光栅来局部地适配。

公开(公告)号：US20220277919A1

公开(公告)日：2022-09-01

申请号：US17628615

申请日：2020-07-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROLF KARL OTTO BEHLING ,  STEFFEN HOLZAPFEL

IPC: H01J35/14 ,  H01J35/30 ,  H01J35/10

Abstract: An X-ray source (100) for generating X-ray radiation of first and second energy spectra is proposed, wherein the X-ray intensity imbalance between the first and second energy spectra is reduced as compared to conventional X-ray sources. The reduction of the X-ray intensity imbalance is achieved by configuring a smaller electron impact angle (141) onto the anode (102) when the higher tube voltage is applied as compared to when the lower tube voltage is applied.