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41.发明公开CORRECTION DEVICE FOR CORRECTING ENERGY-DEPENDENT PROJECTION VALUES 有权KORREKTURVORRICHTUNG ZUR KORREKTUR VONENERGIEABHÄNGIGENPROJEKTIONSWERTEN
公开(公告)号：EP3140814A1
公开(公告)日：2017-03-15
申请号：EP15821085.6
申请日：2015-12-24
发明人： ROESSL, Ewald , BLEVIS, Ira Micah , RUBIN, Daniel , ZARCHIN, Oren
CPC分类号： G06T11/005 , G06T2211/408
摘要： The invention relates to a correction device for correcting energy-dependent projection values. A projection values providing unit (13) provides energy-dependent calibration projection values, which have been generated, during a calibration procedure, based on radiation, which has traversed a material and impinged on an energy-resolving detector (6), for a) different times after the intensity of the radiation has changed in the calibration procedure, b) different intensity changes and c) different materials and/or different material thicknesses. A transient behavior determination and correction unit (12) determines a transient behavior of the energy-resolving detector based on the energy-dependent calibration projection values and corrects energy-dependent actual projection values based on the determined transient behavior. The corrected energy-dependent actual projection values are less influenced or not influenced at all by the transient behavior of the energy-resolving detector, thereby improving the quality of the energy-dependent actual projection values.
摘要翻译： 本发明涉及用于校正能量相关投影值的校正装置。 投影值提供单元（13）提供了在校准过程期间已经基于已经穿过材料并撞击在能量分辨检测器（6）上的冲击物的辐射而产生的能量相关的校准投影值，用于a） 在校准过程中辐射强度发生变化后不同的时间，b）不同的强度变化，c）不同的材料和/或不同的材料厚度。 瞬态行为确定和校正单元（12）基于能量相关的校准投影值确定能量分辨检测器的瞬态行为，并且基于所确定的瞬态行为校正依赖于能量的实际投影值。 校正的能量相关实际投影值受到能量分辨检测器的瞬态特性的影响较小或不受影响，从而提高了依赖于能量的实际投影值的质量。
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42.发明公开EYI CHUSYSTEM FOR GENERATING SPECTRAL COMPUTED TOMOGRAPHY PROJECTION DATA 有权系统ZUR ERZEUGUNG SPEKTRALER PROJEKTIONSDATEN
公开(公告)号：EP3076873A1
公开(公告)日：2016-10-12
申请号：EP15801865.5
申请日：2015-12-01
发明人： DAERR, Heiner , STEADMAN BOOKER, Roger , VOGTMEIER, Gereon , ROESSL, Ewald , MARTENS, Gerhard , RIBBING, Carolina
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4042 , A61B6/4078 , A61B6/4241 , A61B6/482 , A61B6/485 , A61B6/582 , H05G1/30 , H05G1/58
摘要： The invention relates to a system (31) for generating spectral computed tomography projection data. A spectral projection data generation device (6) comprising an energy-resolving detector generates spectral computed tomography projection databased on polychromatic radiation (4), which has been provided by a radiation device (2), after having traversed an examination zone (5), and a reference values generation device generates energy-dependent reference values based on radiation, which has not traversed the examination zone. A spectral parameter providing unit (12) provides a spectral parameter being indicative of a spectral property of the radiation device based on the energy-dependent reference values. In particular, spectral properties of the radiation device can be monitored over time, wherein this information can be used for, for instance, correcting the spectral computed tomography projection data, and/or, if undesired spectral properties of the radiation device are indicated, triggering a replacement of the radiation device.
摘要翻译： 本发明涉及一种用于产生光谱计算机断层摄影投影数据的系统（31）。 包括能量分辨检测器的光谱投影数据生成装置（6）在已经穿过检查区域（5）之后，生成由辐射装置（2）提供的多色辐射（4）上数据化的光谱计算机断层摄影投影， 并且参考值生成装置基于没有经过检查区域的辐射产生基于能量的参考值。 光谱参数提供单元（12）基于能量相关的参考值来提供指示辐射设备的光谱特性的光谱参数。 特别地，可以随时间监视辐射装置的光谱特性，其中该信息可用于例如校正光谱计算机断层摄影投影数据，和/或如果指示辐射装置的不期望的光谱特性，则触发 更换辐射装置。
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公开(公告)号：EP3050028A1
公开(公告)日：2016-08-03
申请号：EP14756059.3
申请日：2014-08-29
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T7/0012 , G06T2207/10081 , G06T2211/408 , G06T2211/424
摘要： A method and a related system (IMA) for reconstructing an image of an electron density in a subject PAT. An x-ray radiation imager is used to expose the subject PAT to radiation to receive projection data. The reconstruction method combines projection data from two channels, namely Compton scatter based attenuation data pC and phase shift data pdφ.
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公开(公告)号：EP2928376A1
公开(公告)日：2015-10-14
申请号：EP13824011.4
申请日：2013-11-28
摘要： An imaging system (500) includes a focal spot (510) that rotates along a path around an examination region (506) and emits radiation. A collimator (512) collimates the radiation, producing a radiation beam (516) that traverses a field of view (520) of the examination region and a subject or object therein. A detector array (522), located opposite the radiation source, across the examination region, detects radiation traversing the field of view and produces a signal indicative of the detected radiation. A beam shaper (524), located between the radiation source and the collimator, rotates in coordination with the focal spot and defines an intensity profile of the radiation beam. The beam shaper includes a plurality of elongate x-ray absorbing elements (606) arranged parallel to each other along a transverse direction with respect to a direction of the beam, separated from each other by a plurality of material free regions (604).
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45.发明公开ALIGNING SOURCE-GRATING-TO-PHASE-GRATING DISTANCE FOR MULTIPLE ORDER PHASE TUNING IN DIFFERENTIAL PHASE CONTRAST IMAGING 有权把源光栅到相位光栅距离相位VOTE MUCH多个订单在差分相位衬度成像
公开(公告)号：EP2884899A1
公开(公告)日：2015-06-24
申请号：EP13783389.3
申请日：2013-08-20
CPC分类号： A61B6/587 , A61B6/484 , A61B6/582 , A61B6/588 , A61B6/589 , G01N23/20025 , G01N23/20075 , G01N2223/643
摘要： The present invention relates handling misalignment in an X-ray imaging system for differential phase contrast imaging. In order to provide a reduction for the pretuning and adjustment requirements for manufacture and maintenance in a differential phase contrast imaging system, an X-ray imaging system (10) for differential phase contrast imaging, is provided that comprises a differential phase contrast setup (12) with an X-ray source (14) and an X-ray detector (16), a grating arrangement (18) comprising a source grating (20), a phase grating (22) and an analyser grating (24), wherein the source grating is arranged between the X-ray source and the phase grating, and the analyser grating is arranged between the phase grating and the detector. Further, a moving arrangement for a relative movement between an object under examination and at least one of the gratings is provided, as well as a processing unit (32), and a translation arrangement (34) for translating the source grating. The phase grating, the analyser grating and the detector are provided as a rigid interferometer unit (36), in which the phase grating and the analyser grating are mounted in parallel to each other. The source grating is misaligned in respect to the interferometer unit such that moiré fringes are detectable in the plane of the detector. The processing unit is configured to detect moiré patterns in signals provided by the detector upon X-ray radiation. The processing unit is further configured to compute a translation signal (38) for translating the source grating for achieving a predetermined moiré pattern. The translation arrangement is configured to adjust the positioning of the source grating at least in the X-ray projection direction (30), based on the value of the translation signal.
摘要翻译： 本发明涉及在用于微分相位对比成像的X射线成像系统中处理的未对准。 为了提供一种用于制造和维护在一个微分相位对比成像系统中的预调节和调整的要求的降低，X射线成像系统（10），用于微分相位对比成像，提供并包括差分相位衬设置（12 （），在X射线源14）和（在X射线检测器（16），一个光栅装置18），其包括22源光栅（20），相位光栅（）和（分析器光栅24），其中，所述 源光栅的X射线源和所述相位光栅和分析器光栅的相位光栅和检测器之间设置之间布置。 此外，对于上物体之间的受检查和光栅中的至少一个的相对运动的运动装置设置，以及一个处理单元（32），和用于转换源光栅的平移装置（34）。 相位光栅，所述分析器光栅和检测器被设置为刚性干涉仪单元（36），其中，所述相位光栅和分析器光栅被安装在平行于海誓山盟。 源光栅错位在相对于所述干涉计单元的搜索没有莫尔条纹是在检测器的平面中可检测的。 所述处理单元被配置成检测在X射线辐射由检测器提供的信号莫尔图案。 所述处理单元被进一步被配置为计算用于转换源光栅，用于实现预定的莫尔图案的平移信号（38）。 翻译装置被配置为调节所述源中的X射线投影方向（30）至少光栅的定位的基础上，翻译信号的值。
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公开(公告)号：EP3863519A1
公开(公告)日：2021-08-18
申请号：EP19827706.3
申请日：2019-12-19
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公开(公告)号：EP3737973A1
公开(公告)日：2020-11-18
申请号：EP19700118.3
申请日：2019-01-08
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公开(公告)号：EP3669783A1
公开(公告)日：2020-06-24
申请号：EP18215305.6
申请日：2018-12-21
摘要： Phase stepping for differential phase contrast and/or dark field x-ray imaging using a switchable grating in which particles in a reservoir are aligned into wall-like x-ray absorbing structures by inducing a standing wave in a medium in the reservoir. The standing wave is modified by a second ultrasound generator that modifies the standing wave such that the pressure nodes of the first standing wave shift position.
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公开(公告)号：EP3545534A1
公开(公告)日：2019-10-02
申请号：EP17804165.3
申请日：2017-11-22
发明人： THRAN, Axel , DAERR, Heiner , ROESSL, Ewald , VOGTMEIER, Gereon
IPC分类号： G21K1/02
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