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公开(公告)号：EP3322340B1
公开(公告)日：2019-06-19
申请号：EP16738149.0
申请日：2016-07-12
发明人： MARTENS, Gerhard , ROESSL, Ewald
IPC分类号： A61B6/00
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公开(公告)号：EP3082608B1
公开(公告)日：2018-11-21
申请号：EP14830883.6
申请日：2014-12-16
发明人： ROESSL, Ewald , DAERR, Heiner , KOEHLER, Thomas
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/035 , A61B6/405 , A61B6/482 , A61B6/542 , G01T1/247 , H01J35/06 , H01J35/10 , H01J2235/086 , H05G1/56 , H05G1/60
摘要： An imaging system (100) includes a radiation source (110) with a focal spot (204) that emits a beam of x-ray photons that traverses an examination region (106). The imaging system further includes a photon counting detector array (122) that detects a sub-set of the x-ray photons that traverse an examination region. The imaging system further includes a controller (116) that generates and transmits a pause signal, in response to a calculated drop in an intensity of the emitted the beam of x-ray photons below a predetermined intensity level, which causes the photon counting detector array to pause detecting the sub-set of the x-ray photons. The imaging system further includes a counter (136) that counts, for each of a plurality of counting periods, the x-ray photons of the sub-set detected by the photon counting detector array in the corresponding counting period.
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公开(公告)号：EP3380870A1
公开(公告)日：2018-10-03
申请号：EP16801180.7
申请日：2016-11-23
IPC分类号： G01T1/24
摘要： The present invention is directed towards a photon counting radiation detector (10) comprising an array of pixels (13) comprising a plurality of detection pixels (131) for detecting imaging information. At least one pixel of the array of pixels (132) is shielded from receiving radiation. A dark current is determined from the shielded pixel (132) and is used to compensate for dark current in the other, non-shielded pixels (131). Embodiments are directed to integrating pixel shielding within an Anti Scatter Grid or in a mask.
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公开(公告)号：EP3082600B1
公开(公告)日：2018-03-28
申请号：EP14806260.7
申请日：2014-12-03
发明人： ROESSL, Ewald , PASTINK, Hendrik Albert , KOEHLER, Thomas , DAERR, Heiner , VAN STEVENDAAL, Udo , MARTENS, Gerhard
CPC分类号： A61B6/484 , A61B6/03 , A61B6/06 , A61B6/4291 , A61B6/502 , A61B6/585 , A61B6/587 , G21K1/04 , G21K2207/005
摘要： A phase contrast imaging apparatus (MA) and related image processing method. The imaging apparatus includes a movable arm (AR) that carries a detector (D) and one or more interferometric gratings (G0, G1, G2). The imaging apparatus includes a rigidizer (RGD) to control the rigidity of at least the arm (AR) or a mounting (GM) for the gratings (G0, G1, G2). This allows controlling a drift of a Moiré pattern as detected in a sequence of readouts. A phase of the so controlled Moiré pattern can be used to calibrate the imaging apparatus by using the image processing method.
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公开(公告)号：EP2296550B1
公开(公告)日：2018-03-28
申请号：EP09786437.5
申请日：2009-06-22
IPC分类号： G01N23/087 , A61B6/03 , A61B5/00 , A61B6/00
CPC分类号： G01N23/087 , A61B5/4869 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482
摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.
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公开(公告)号：EP3234649A1
公开(公告)日：2017-10-25
申请号：EP15813745.5
申请日：2015-12-11
IPC分类号： G01T1/24
摘要： The present invention relates to a detector (22′) for detecting ionizing radiation, comprising: a directly converting semi-conductor layer (36) for producing charge carriers in response to incident ionizing radiation; and a plurality of electrodes (34) corresponding to pixels for registering the charge carriers and generate a signal corresponding to registered charge carriers; wherein an electrode of the plurality of electrodes (34) is structured to two-dimensionally intertwine with at least two adjacent electrodes to register the charge carriers by said electrode and by at least one adjacent electrode. The present invention further relates to a detection method and to an imaging apparatus.
摘要翻译： 本发明涉及用于检测电离辐射的检测器（22'），包括：用于响应入射电离辐射产生电荷载流子的直接转换半导体层（36） 以及对应于像素的多个电极（34），用于记录电荷载流子并产生对应于记录的电荷载流子的信号; 其中所述多个电极（34）中的电极被构造为与至少两个相邻电极二维缠绕以通过所述电极和至少一个相邻电极记录电荷载流子。 本发明还涉及检测方法和成像设备。
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公开(公告)号：EP3220827A1
公开(公告)日：2017-09-27
申请号：EP15798245.5
申请日：2015-11-11
发明人： BRENDEL, Bernhard Johannes , PROKSA, Roland , KOEHLER, Thomas , ROESSL, Ewald , DAERR, Heiner , GRASS, Michael , THRAN, Axel
摘要： An imaging system includes a radiation source (108) configured to rotate about an examination region (106)and emit radiation that traverses the examination region. The imaging system further includes an array of radiation sensitive pixels (112) configured to detect radiation traversing the examination region and output a signal indicative of the detected radiation. The array of radiation sensitive pixels is disposed opposite the radiation source, across the examination region. The imaging system further includes a rigid flux filter device (130) disposed in the examination region between the radiation source and the radiation sensitive detector array of photon counting pixels. The rigid flux filter device is configured to filter the radiation traversing the examination region and incident thereon. The radiation leaving the rigid flux filter device has a predetermined flux.
摘要翻译： 成像系统包括被配置为围绕检查区域（106）旋转并且发射穿过检查区域的辐射的辐射源（108）。 所述成像系统还包括辐射敏感像素阵列（112），所述辐射敏感像素阵列配置成检测穿过所述检查区域的辐射并输出指示所述检测到的辐射的信号。 辐射敏感像素阵列横跨检查区域与辐射源相对设置。 成像系统还包括设置在辐射源和光子计数像素的辐射敏感探测器阵列之间的检查区域中的刚性通量滤波器装置（130）。 刚性通量滤波器装置被配置为过滤穿过检查区域并入射在其上的辐射。 离开刚性滤波器装置的辐射具有预定的通量。
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公开(公告)号：EP3217879A1
公开(公告)日：2017-09-20
申请号：EP15791642.0
申请日：2015-11-10
发明人： KOEHLER, Thomas , ROESSL, Ewald , BEHLING, Rolf Karl Otto , NOËL, Peter Benjamin Theodor , PFEIFFER, Franz
摘要： 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.
摘要翻译： 本发明涉及用于基于光栅的相位对比计算机断层摄影的X射线设备（10）的源 - 检测器布置（11）。 源 - 检测器装置包括适于相对于物体（140）围绕旋转轴线（R）旋转运动的X射线源（12），其适于发射相干或准相干辐射的X射线束 线图案（21）; 和包括第一光栅元件（24）和第二光栅元件（26）以及检测器元件（6）的X射线检测系统（16）; 其中所述辐射的线图案和所述光栅元件的光栅方向被布置为与所述旋转轴正交; 并且其中所述第一光栅元件具有依赖于所述X射线束的锥角（β）而变化的第一光栅间距和/或所述第二光栅元件具有依赖于所述X射线束的锥角而变化的第二光栅间距 。
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80.发明公开X-RAY DETECTOR, IMAGING APPARATUS AND CALIBRATION METHOD 有权RÖNTGENDETEKTOR，BILDGEBUNGSVORRICHTUNG UND KALIBRIERVERFAHREN
公开(公告)号：EP3132287A1
公开(公告)日：2017-02-22
申请号：EP15807909.5
申请日：2015-12-09
发明人： ROESSL, Ewald , DAERR, Heiner
摘要： The present invention relates to an X-ray detector comprising a directly converting semiconductor layer (60) having a plurality of pixels for converting incident radiation into electrical measurement signals with a band gap energy characteristic of the semiconductor layer, wherein said incident radiation is x-ray radiation emitted by an x-ray source (2) or light emitted by at least one light source (30, 33). Further, an evaluation unit (67) is provided for calculating evaluation signals per pixel or group of pixels from first electrical measurement signals generated per pixel or group of pixels when light from said at least one light source at a first intensity is coupled into the semiconductor layer and second electrical measurement signals generated per pixel or group of pixels when light from said at least one light source at a second intensity is coupled into the semiconductor layer, wherein said evaluation unit is configured to detect per pixel or group of pixels a noise peak in said first and second electrical measurement signals and to determine offset and gain per pixel or group of pixels from the detected noise peaks. A detection unit (69) is provided for determining detection signals from electrical measurement signals generated when x-ray radiation is incident onto the semiconductor layer, and a calibration unit (68) is provided for calibrating the detection unit on the basis of the evaluation signals.
摘要翻译： 本发明涉及一种X射线检测器，其包括具有多个像素的直接转换半导体层（60），用于将入射辐射转换成具有半导体层的带隙能量特性的电测量信号，其中所述入射辐射为x- 由X射线源（2）发射的射线辐射或由至少一个光源（30,33）发射的光。 此外，提供评估单元（67），用于当来自第一强度的来自所述至少一个光源的光耦合到半导体中时，从每像素或像素组产生的第一电测量信号中，计算每像素或像素组的像素或者像素组 当来自所述至少一个光源的来自第二强度的光耦合到半导体层中时，每像素或像素组产生的层和第二电测量信号被耦合到半导体层中，其中所述评估单元被配置为检测每像素或像素组噪声峰值 在所述第一和第二电测量信号中，并且从检测到的噪声峰值确定每像素或一组像素的偏移和增益。 提供检测单元（69），用于确定当x射线辐射入射到半导体层上时产生的电测量信号的检测信号，并且提供校准单元（68），用于根据评估信号校准检测单元 。
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