公开(公告)号：US09995830B2

公开(公告)日：2018-06-12

申请号：US15128114

申请日：2016-03-15

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Volkmar Schulz

IPC: G01T1/164

CPC classification number: G01T1/1647

Abstract: A method for scintillation event localization in a radiation particle detector includes providing a plurality of scintillator element locations (2′) configured to emit a burst of photons responsive to a radiation particle being absorbed at the scintillator element location (2′). A burst of photons emitted by the scintillator element location (2′) is detected with a photosensor (5). The photosensor (5) includes an array of single photon avalanche diodes configured to break down responsive to impingement of a photon. Breakdown data (30) is acquired indicative of which of the single photon avalanche diodes are in breakdown. Predetermined photosensor sensitivity data (20, 40) assigns single photon avalanche diodes to groups. Each group is assigned to exactly one scintillator element location (2′). Finally the number of single photon avalanche diodes in breakdown is determined for each group individually to identify the scintillator element location (2′) that emitted the burst of photons.

公开(公告)号：US09423479B2

公开(公告)日：2016-08-23

申请号：US14075098

申请日：2013-11-08

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Johan A. Overweg ,  Volkmar Schulz ,  Torsten J. Solf ,  Gordon D. DeMeester ,  Michael A. Morich

IPC: G01V3/00 ,  G01R33/48 ,  A61B5/055 ,  G01R33/385 ,  A61B5/00 ,  G01R33/3875 ,  G01R33/421

CPC classification number: G01R33/481 ,  A61B5/0035 ,  A61B5/055 ,  G01R33/385 ,  G01R33/3875 ,  G01R33/421 ,  G01R33/4215 ,  G01R33/4808

Abstract: A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.

Abstract translation: 一般为圆柱形的线圈绕组包括在初级线圈绕组较大的径向位置处的初级线圈绕组和屏蔽线圈绕组，并且没有线圈绕组的弓形或环形中心间隙具有至少十厘米的轴向范围， 并且跨越至少180°的角度间隔。 设置在中心间隙的每个边缘处的连接导体电连接所选择的初级和次级线圈绕组。 在扫描仪设置中，主磁体设置在大致圆柱形的线圈绕组的外侧。 在混合扫描器设置中，正电子发射断层摄影（PET）检测器的环形环设置在大致圆柱形的线圈绕组组的中心间隙中。

公开(公告)号：US10542956B2

公开(公告)日：2020-01-28

申请号：US15570758

申请日：2016-05-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Yannick Berker ,  Volkmar Schulz

IPC: A61B6/00 ,  A61B6/03 ,  G01R33/48 ,  G06T7/00 ,  G06T11/00

Abstract: The invention relates to a system for generating an estimate of a photon attenuation map for an object on the basis of single-scattered coincidences measured in a PET scanner. The system comprises a simulation module configured to calculate single-scattered coincidences by a numerical model calculation based on a preliminary attenuation map, where the estimate of the photon attenuation map is generated by adapting at least some attenuation values. The model calculation is made on the basis of a grid covering the object, the grid comprising grid elements (61) to which attenuation values are assigned, and the simulation module is further configured to determine at least one set of adjacent grid elements (61) in order to form a merged image element (63) including the set of adjacent grid elements (61) and to assign a single attenuation value to the merged image element in the model calculation.

公开(公告)号：US10126391B2

公开(公告)日：2018-11-13

申请号：US14905071

申请日：2014-07-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Bjoern Weissler ,  Pierre Gebhardt ,  Jacob Adrian Clemens Wehner ,  Volkmar Schulz

IPC: G01R33/48 ,  G01R33/56 ,  G01T1/29 ,  G01T1/16 ,  G01R33/36

Abstract: A combined-modality imaging assembly includes a Magnetic Resonance (MR) imaging system and a nuclear imaging system. The nuclear imaging system has a plurality of (M) modules; and the combined imaging assembly includes a timing control unit having a reference clock unit; and at least one of a phase shifting unit and a frequency shifting unit. At least one of the phase shifting unit and the frequency shifting unit is configured to receive a reference clock signal from the reference clock unit and to generate a plurality of (M) shifted clock signals for clocking the (M) modules such that at least one of the (M) shifted clock signals is shifted respective the reference clock signal in at least one of frequency or phase. In so doing, reduced interference between the modules of the nuclear imaging system and the MR imaging system is obtained.

公开(公告)号：US09903960B1

公开(公告)日：2018-02-27

申请号：US15128117

申请日：2016-03-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Yannick Berker ,  Volkmar Schulz

IPC: G01T1/20 ,  G01T1/29 ,  G01T1/164 ,  G01T1/24 ,  G01R33/48 ,  G01T1/16

CPC classification number: G01T1/2985 ,  G01R33/481 ,  G01T1/1603 ,  G01T1/1642 ,  G01T1/1647 ,  G01T1/20 ,  G01T1/243

Abstract: A method for determining the position of a scintillation event in a radiation particle detector with multiple scintillator element locations which are configured to emit a burst of photons responsive to a radiation particle being absorbed at the scintillator element location and with a plurality of photosensors (5.1, 5.2, 5.3, 5.4) optically coupled to said scintillator element locations, comprising the steps of determining, for each of the photosensors (5.1, 5.2, 5.3, 5.4), a triggering probability indicative of the probability of said photosensor (5.1, 5.2, 5.3, 5.4) measuring a number of photons that exceeds a predetermined triggering threshold; measuring a photon distribution with the photosensors (5.1, 5.2, 5.3, 5.4) indicative of the number of photons incident on the individual photosensors (5.1, 5.2, 5.3, 5.4); calculating, for each of the scintillator element locations, a likelihood that a scintillation event with a predetermined energy value took place in said scintillator element location based on the measured photon distribution and the triggering probability of each of the photosensors (5.1, 5.2, 5.3, 5.4); and identifying the scintillator element location having the maximum likelihood.

公开(公告)号：US20150130466A1

公开(公告)日：2015-05-14

申请号：US14405298

申请日：2013-05-14

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips ,  Falk Uhlemann ,  Volkmar Schulz

IPC: G01R33/345 ,  G01R33/34 ,  G01R33/422

CPC classification number: G01R33/3456 ,  G01R33/34076 ,  G01R33/3453 ,  G01R33/422 ,  G01R33/481 ,  G01R33/56563 ,  G01R33/5659

Abstract: A TEM resonator system is disclosed comprising at least two TEM resonators (21,31; 22, 32), especially in the form of TEM volume coils, and especially for use in an MR imaging system or apparatus for transmitting RF excitation signals and/or for receiving MR signals into/from an examination object or a part thereof, respectively, wherein the TEM resonators are arranged and displaced along a common longitudinal axis and wherein an intermediate RF shield (4) is positioned in longitudinal direction between the two TEM resonators for at least substantially preventing electromagnetic radiation from emanating from between the first TEM resonator and the second TEM resonator into the surroundings. A PET detector and/or another supplementary element can be placed in the volume between the two TEM resonators.

Abstract translation: 公开了一种TEM谐振器系统，其包括至少两个TEM谐振器（21,31; 22,32），特别是TEM体积线圈的形式，并且特别用于用于传输RF激励信号的MR成像系统或装置和/或 用于分别从检查对象或其一部分接收MR信号，其中TEM谐振器沿着共同的纵向轴线布置和移位，并且其中在两个TEM谐振器之间沿纵向定位中间RF屏蔽件（4），用于 至少基本上防止电磁辐射从第一TEM谐振器和第二TEM谐振器之间发射到周围环境中。 PET检测器和/或另外的补充元件可以放置在两个TEM谐振器之间的体积中。

公开(公告)号：US10288702B2

公开(公告)日：2019-05-14

申请号：US14966453

申请日：2015-12-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Volkmar Schulz ,  Yannick Berker ,  Jakob Adrian Clemens Wehner

IPC: G01R33/48 ,  G01R33/422 ,  G01R33/565 ,  G01R33/58

Abstract: A combined PET/MR system includes an MR subsystem including a main field magnet (14) which generates a stationary magnetic field through an examination region (16), a gradient magnetic field system (18, 20, 22, 24) which applies magnetic field gradients across the examination region, and an RF system (26, 28, 32, 34, 36, 38) that applies RF excitation pulses to excite resonance in a subject in the examination region and receive magnetic resonance signals from the subject. A PET detector module (70) which is permanently or removably fixed in the examination region (16) to detect radiation from radiopharmaceuticals injected into the subject causes distortions in the magnetic field gradients. A plurality of probes (90) which are mounted in a fixed relationship to the PET detector module (70) measure magnetic field strength. A gradient magnetic field distortion correction system (110) determines distortions caused in the gradient magnetic fields and corrects the magnetic resonance signals accordingly. The PET detector module includes a plurality of RF shielded detector units (132) which are mounted in a circumferentially spaced relationship with a gap (136) there between through which RF excitation pulses and magnetic resonance signals pass.

公开(公告)号：US10143376B2

公开(公告)日：2018-12-04

申请号：US14225491

申请日：2014-03-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Volkmar Schulz ,  Torsten Solf ,  Johan Overweg ,  Andreas Thon

IPC: A61B5/00 ,  A61B6/03 ,  A61B6/00 ,  G01R33/48 ,  G01T1/16

Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.

公开(公告)号：US20150098640A1

公开(公告)日：2015-04-09

申请号：US14396398

申请日：2013-04-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Yannick Berker ,  Volkmar Schulz

IPC: G06T11/00 ,  G01T1/161

CPC classification number: G06T11/005 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/5258 ,  G01T1/161 ,  G01T1/1647

Abstract: An imaging system (36) includes a Positron Emission Tomography (PET) scanner (38) and one or more processors (52). The Positron Emission Tomography (PET) scanner (38) which generates event data including true coincident events and scatter events, the event data includes each end point of a line of response (LOR) and an energy of each end point. The one or more processors (52) are programmed to generate (72) a plurality of activity map and attenuation map pairs based on the true coincident events, and select (76) an activity map and an attenuation map from the plurality of activity and attenuation map pairs based on the scattered events.

Abstract translation: 成像系统（36）包括正电子发射断层扫描（PET）扫描仪（38）和一个或多个处理器（52）。 正电子发射断层扫描（PET）扫描仪（38）产生包括真重合事件和散射事件的事件数据，事件数据包括响应线（LOR）的每个终点和每个终点的能量。 一个或多个处理器（52）被编程为基于真实重合事件来生成（72）多个活动图和衰减图对，并且从多个活动和衰减中选择（76）活动图和衰减图 基于分散事件的映射对。

公开(公告)号：US20140312238A1

公开(公告)日：2014-10-23

申请号：US14363349

申请日：2012-12-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Jinling Liu ,  Bjoern Weissler ,  Steven R. Martin ,  Volkmar Schulz ,  Pierre Klaus Gebhardt ,  Peter Michael Jakob Dueppernbecker ,  Wolfgang Renz

IPC: G01T1/17

CPC classification number: G01T1/17 ,  G01T1/1618 ,  G01T1/243 ,  G01T1/244 ,  G01T1/247 ,  G01T1/249 ,  Y10T29/49117

Abstract: A PET or SPECT radiation detector module (50) includes an array of detectors (54, 58) and their associated processing circuitry are connected by a flexible cable having releasable connectors. A method of mounting and dismounting includes mounting a radiation detector array in a support structure in a diagnostic scanner, connecting one end of a flexible connector to the detector array, and connecting the other end of the flexible connector to its associated circuitry.

Abstract translation: PET或SPECT辐射检测器模块（50）包括一组检测器（54,58），并且其相关联的处理电路通过具有可释放连接器的柔性电缆连接。 安装和拆卸的方法包括将辐射探测器阵列安装在诊断扫描器中的支撑结构中，将柔性连接器的一端连接到检测器阵列，以及将柔性连接器的另一端连接到其相关电路。