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    • 3. 发明申请
    • RETRIEVING AND VIEWING MEDICAL IMAGES
    • 检索和查看医学图像
    • US20120066241A1
    • 2012-03-15
    • US13320956
    • 2010-05-17
    • Dieter GellerReinhard KneserYuechen Qian
    • Dieter GellerReinhard KneserYuechen Qian
    • G06F17/30
    • G06F19/3487G06F19/00G06F19/321G06F19/324G16H15/00
    • As medical imaging becomes more affordable, and the diversity of diagnostic modalities and therapeutic treatments increase, the amount of data being stored increases, and the problem becomes even more critical. One approach to improve retrieval efficiency of images is to employ semantics to establish a defined set of search and classification terms. However, such semantic systems still require the user to make a selection of the most appropriate term or terms to classify a report or image, and the accuracy of the results are thus dependent on the skill and knowledge of the classifier. According to a first aspect of the invention, a retriever is provided for retrieving a medical image having a searchable attribute, the retriever being configured to interface with a semantic database and an image database, and wherein the searchable attribute is determined by segmenting the medical image, using the anatomical model.
    • 随着医学成像变得更加实惠,并且诊断模式和治疗方法的多样性增加,存储的数据量增加,并且问题变得更加重要。 提高图像检索效率的一种方法是采用语义来建立一组定义的搜索和分类术语。 然而,这样的语义系统仍然需要用户选择最合适的术语或术语来分类报告或图像,并且结果的准确性因此取决于分类器的技能和知识。 根据本发明的第一方面,提供了一种用于检索具有可搜索属性的医学图像的检索器,所述检索器被配置为与语义数据库和图像数据库进行接口,并且其中通过分割医学图像来确定可搜索属性 ,使用解剖模型。
    • 5. 发明申请
    • APPARATUS FOR PHASE-CONTRAST IMAGING COMPRISING A DISPLACEABLE X-RAY DETECTOR ELEMENT AND METHOD
    • 包含可移位X射线探测器元件和方法的相位对比成像装置
    • US20120307966A1
    • 2012-12-06
    • US13514383
    • 2010-12-03
    • Ewald RoesslKlaus Juergen EngelGereon VogtmeierDieter GellerGerhard MartensSabastian Siegmund SchusserThomas Koehler
    • Ewald RoesslKlaus Juergen EngelGereon VogtmeierDieter GellerGerhard MartensSabastian Siegmund SchusserThomas Koehler
    • G01N23/04
    • A61B6/00A61B6/032A61B6/4021A61B6/4092A61B6/4291A61B6/484
    • The present invention relates to X-ray image acquisition technology in general. Employing phase-contrast imaging for X-ray image acquisition may significantly enhance the quality and information content of images acquired. However, phase-contrast information may only be obtainable in a small detector region, possibly being too small for a sufficient field of rotation view for specialized X-ray imaging applications. Accordingly, an apparatus for phase-contrast imaging is provided that may allow the acquisition of an enlarged field of view. According to the present invention an apparatus (1) for phase-contrast imaging is provided, comprising an X-ray source (2), an X-ray detector (12) element having a detector size, a beam splitter grating (8) and an analyzer grating (10). An object (6) is arrangeable between the X-ray source (2) and the X-ray detector (12). The beam splitter grating (8) and the analyzer grating (10) are arrangeable between the X-ray source (2) and the X-ray detector (12). X-ray source (2), the beam splitter grating (8), the analyzer grating (10) and the X-ray detector (12) are operatively coupled such that a phase-contrast image of the object (6) is obtainable. The apparatus (1) is adapted for acquiring a phase-contrast image having a field of view larger than the detector size. The X-ray detector element (12) is displaceable and by the displacement of the X-ray detector (12) a phase-contrast image of the field of view is obtainable.
    • 本发明一般涉及X射线图像获取技术。 采用X射线图像获取的相位对比成像可显着提高获取图像的质量和信息内容。 然而,相位对比度信息只能在小的检测器区域中获得,对于专门的X射线成像应用,可能对于足够的旋转视场来说太小。 因此,提供了一种用于相位对比成像的装置,其可以允许获取放大的视场。 根据本发明,提供了一种用于相位对比成像的装置(1),包括具有检测器尺寸的X射线源(2),X射线检测器(12)元件,分束器光栅(8)和 分析器光栅(10)。 物体(6)可布置在X射线源(2)和X射线检测器(12)之间。 分束器光栅(8)和分析器光栅(10)可布置在X射线源(2)和X射线检测器(12)之间。 X射线源(2),分束器光栅(8),分析器光栅(10)和X射线检测器(12)可操作地耦合,使得可以获得物体(6)的相位对比度图像。 装置(1)适于获取具有大于检测器尺寸的视场的相位对比度图像。 X射线检测器元件(12)可移动,并且通过X射线检测器(12)的移位,可以获得视场的相位对比图像。
    • 6. 发明申请
    • CALIBRATION OF DIFFERENTIAL PHASE-CONTRAST IMAGING SYSTEMS
    • 差分相位成像系统的校准
    • US20120250823A1
    • 2012-10-04
    • US13514166
    • 2010-12-08
    • Gereon VogtmeierKlaus Juergen EngelDieter GellerThomas KoehlerEwald Roessl
    • Gereon VogtmeierKlaus Juergen EngelDieter GellerThomas KoehlerEwald Roessl
    • A61B6/02
    • A61B6/4291A61B6/4092A61B6/484A61B6/583G21K2207/005
    • The present invention relates to an X-ray imaging system and a method for differential phase—contrast imaging of an object. To improve calibration of differential phase—contrast imaging systems and the alignment of the gratings an X-ray imaging system is provided that comprises an X-ray emitting arrangement providing at least partially coherent X-ray radiation and an X-ray detection arrangement comprising a phase-shift diffraction grating, a phase analyzer grating, and an X-ray image detector, all arranged along an optical axis. For stepping, the gratings and/or the X-ray emitting arrangement are provided with at least two actuators arranged opposite to each other with reference to the optical axis. For calibration, calibration projections are acquired without an object, wherein, the emitted X-ray radiation or one of the gratings is stepwise displaced with a calibration displacement value. For examination, measurement projections are acquired with an object, wherein the emitted X-ray radiation or one of the gratings is stepwise displaced with a measurement, a calibration projection is associated to each of the measurement projections by registering the latter with the calibration projections.
    • 本发明涉及一种用于物体的差分相位对比成像的X射线成像系统和方法。 为了改进差分相位对比成像系统的校准和光栅的对准,提供了一种X射线成像系统,其包括提供至少部分相干X射线辐射的X射线发射装置和包括 相移衍射光栅,相位分析器光栅和X射线图像检测器,均沿着光轴排列。 对于步进,光栅和/或X射线发射装置设置有相对于光轴彼此相对布置的至少两个致动器。 对于校准,在没有物体的情况下获取校准投影,其中,所发射的X射线辐射或其中一个光栅以校准位移值逐步位移。 为了进行检查,用物体获取测量投影,其中所发射的X射线辐射或其中一个光栅通过测量逐步移位,通过将校准投影与校准投影配准,将校准投影与每个测量投影相关联。
    • 8. 发明申请
    • CORRECTION METHOD FOR DIFFERENTIAL PHASE CONTRAST IMAGING
    • 用于差分相位成像的校正方法
    • US20120099702A1
    • 2012-04-26
    • US13319527
    • 2010-06-10
    • Klaus Juergen EngelDieter GellerGereon Vogtmeier
    • Klaus Juergen EngelDieter GellerGereon Vogtmeier
    • G01N23/04
    • A61B6/00A61B6/4092A61B6/4291A61B6/484G01N23/04G21K1/06G21K2207/005
    • The present invention generally refers to a correction method for grating-based X-ray differential phase contrast imaging (DPCI) as well as to an apparatus which can advantageously be applied in X-ray radiography and tomography for hard X-ray DPCI of a sample object or an anatomical region of interest to be scanned. More precisely, the proposed invention provides a suitable approach that helps to enhance the image quality of an acquired X-ray image which is affected by phase wrapping, e.g. in the resulting Moiré interference pattern of an emitted X-ray beam in the detector plane of a Talbot-Lau type interferometer after diffracting said X-ray beam at a phase-shifting beam splitter grating. This problem, which is further aggravated by noise in the obtained DPCI images, occurs if the phase between two adjacent pixels in the detected X-ray image varies by more than π radians and is effected by a line integration over the object's local phase gradient, which induces a phase offset error of π radians that leads to prominent line artifacts parallel to the direction of said line integration.
    • 本发明总体上涉及一种用于基于光栅的X射线差分相位对比成像(DPCI)的校正方法以及可以有利地应用于X射线照相术和X射线成像的装置,用于样本的硬X射线DPCI 对象或要扫描的感兴趣的解剖区域。 更精确地,所提出的发明提供了一种合适的方法,其有助于增强受到相位包裹影响的获得的X射线图像的图像质量,例如, 在衍射在相移分束器光栅上的所述X射线束之后,在Talbot-Lau型干涉仪的检测器平面中产生的发射的X射线束的莫尔干涉图。 如果所检测的X射线图像中的两个相邻像素之间的相位变化多于&pgr,则发生由获得的DPCI图像中的噪声进一步恶化的问题。 弧度并且通过对象的局部相位梯度上的线积分实现,其引起相位偏移误差&pgr; 导致与所述线集成方向平行的突出的线条伪影的弧度。
    • 9. 发明申请
    • PATH PROXIMITY RENDERING
    • 路径接近渲染
    • US20100309199A1
    • 2010-12-09
    • US12676641
    • 2008-09-11
    • Dieter GellerHelko Lehmann
    • Dieter GellerHelko Lehmann
    • G06T15/00
    • G06T19/00G06T11/003G06T15/08
    • The invention relates to a system (100) for visualizing an object of interest comprised in a volume of an image dataset, the system comprising a path unit (110) for specifying a path in the volume of the image dataset on the basis of the object of interest, a location unit (120) for determining a location on a projection ray through the volume of the image dataset on the basis of the specified path, and a value unit (130) for computing a projected gray value corresponding to the projection ray on the basis of the determined location on the projection ray. Because the locations on the projection ray are determined based on the specified path for indicating the object of interest, the actual computation of the projection gray values may be designed and constructed to show gray values describing the object of interest while hiding gray values describing other objects, in particular occluding objects. Thus, the system of the invention is arranged for visualizing the object of interest at different viewing angles without occluding the object of interest.
    • 本发明涉及一种用于可视化包含在图像数据集的卷中的感兴趣对象的系统(100),该系统包括用于基于对象指定图像数据集的卷中的路径的路径单元(110) 用于基于指定路径确定通过图像数据集的体积的投影光线上的位置的位置单元(120),以及用于计算对应于投影光线的投影灰度值的值单元(130) 在投影光线上确定的位置的基础上。 由于投影光线上的位置是基于用于指示感兴趣对象的指定路径来确定的,所以投影灰度值的实际计算可以被设计和构造成显示描述感兴趣对象的灰度值,同时隐藏描述其他对象的灰度值 ,特别是闭塞物体。 因此,本发明的系统被安排用于在不遮挡感兴趣的对象的情况下以不同的视角来可视化感兴趣的对象。