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1. 发明申请

WO2007046024A1 AUTOMATIC ADAPTIVE SOFT TISSUE THRESHOLDING FOR TWO-PASS CT CONE-BEAM ARTIFACT REDUCTION 审中-公开
标题翻译：自动适应性软组织对两通CT锥体造影减少的影响
公开(公告)号：WO2007046024A1
公开(公告)日：2007-04-26
申请号：PCT/IB2006/053658
申请日：2006-10-06
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , FORTHMANN, Peter , GRASS, Michael , PROKSA, Roland
发明人： FORTHMANN, Peter , GRASS, Michael , PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： G06T11/008 , Y10S378/901
摘要： Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image.
摘要翻译：由于图像中的软组织水平通常包括空气和骨骼边界之间的各种值，因此先验地显示什么阈值可能并不明显。根据本发明的示例性实施例，提供一种检查装置，其适于确定用于减去软组织校正图像的最佳权重，而不执行大量向前和向后的投影。可以提供这样来确定基于软组织条纹图像的多个减法的粗糙度函数，每个减法对应于条纹图像的不同加权。

2. 发明申请

WO2004089217A1 COMPUTER TOMOGRAPHY METHOD FOR A PERIODICALLY MOVING OBJECT 审中-公开
标题翻译：用于周期性移动对象的计算机测绘方法
公开(公告)号：WO2004089217A1
公开(公告)日：2004-10-21
申请号：PCT/IB2004/001061
申请日：2004-04-02
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , GRASS, Michael , PROKSA, Roland
发明人： KÖHLER, Thomas , GRASS, Michael , PROKSA, Roland
IPC分类号： A61B6/03
CPC分类号： A61B6/541 , A61B5/1135 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/504
摘要： The invention relates to a computer tomography method in which a periodically moving object, in particular an organ of the body, is irradiated by a cone-shaped beam cluster (4) along a trajectory which runs on a cylindrical surface. The radiation transmitted through the object is measured by means of a detector unit (16), and at the same time the periodic movement of the object is recorded. In order to reconstruct the absorption distribution of the object, the measured values or the corresponding beams are rebinned to form a number of parallel projections, where for each of these projections a measured value is determined whose beam irradiates the object. The point in time at which this measured value was acquired is allocated to the respective projection. For the reconstruction, which may for example be carried out using a filtered back-projection, only projections whose allocated points in time lie within a predefined, specific time range (H1) within a period of the object movement are used.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中周期性移动的物体，特别是身体的脏器被沿着在圆柱形表面上运行的轨迹由锥形束簇（4）照射。通过检测器单元（16）测量透过物体的辐射，同时记录物体的周期性运动。为了重建物体的吸收分布，将测量值或对应的光束重新组合以形成多个平行投影，其中对于这些投影中的每一个，确定其光束照射物体的测量值。将获取该测量值的时间点分配给相应的投影。对于可以例如使用滤波反投影来执行的重建，仅使用其分配的时间点在物体移动的时间段内的预定义的特定时间范围（H1）内的投影。

3. 发明申请

WO2006117720A3 ENERGY-RESOLVED PHOTON COUNTING FOR CT 审中-公开
公开(公告)号：WO2006117720A3
公开(公告)日：2006-11-09
申请号：PCT/IB2006/051285
申请日：2006-04-25
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , PROKSA, Roland , GRASS, Michael
发明人： PROKSA, Roland , GRASS, Michael
IPC分类号： G01N23/04 , G01T1/17
摘要： Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.

4. 发明申请

WO2005008597A2 RECONSTRUCTION OF AN IMAGE OF A MOVING OBJECT FROM VOLUMETRIC DATA 审中-公开
标题翻译：用体数据重建一个运动物体的图像
公开(公告)号：WO2005008597A2
公开(公告)日：2005-01-27
申请号：PCT/IB2004/051150
申请日：2004-07-07
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , GRASS, Michael , KUHN, Michael, Harald , PROKSA, Roland
发明人： KÖHLER, Thomas , GRASS, Michael , KUHN, Michael, Harald , PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： G06T7/20 , G06T11/005 , G06T2207/10081 , G06T2207/30048 , G06T2211/404 , G06T2211/412
摘要： In the CT imaging of non-homogeneously moving objects such as the heart or the coronary vessel tree, there is a problem that different parts of the objects are at rest at different points in time. Thus, a gated reconstruction with a globally selected time point does not yield a sharp image of such objects. According to the present invention, a motion of the object is estimated, describing the motion of selected regions of these objects. Then, on the basis of the estimated motion, time points are determined, where these areas have minimal motion. Then, an image is reconstructed, wherein the data from which the respective regions are reconstructed, correspond to the respective time points, where the regions have minimal motion. Due to this, an improved image qualify maybe provided.
摘要翻译：在诸如心脏或冠状血管树等非均匀移动物体的CT成像中，存在物体的不同部分在不同时间点静止的问题。因此，具有全局选定时间点的门控重建不会产生这样的对象的清晰图像。根据本发明，估计物体的运动，描述这些物体的选定区域的运动。然后，基于估计的运动，确定时间点，其中这些区域具有最小的运动。然后，重建图像，其中重构相应区域的数据对应于各区域具有最小运动的各个时间点。由于这一点，可能会提供改进的图像限定。

5. 发明申请

WO2006038145A1 COMPUTED TOMOGRAPHY METHOD 审中-公开
标题翻译：计算机测图法
公开(公告)号：WO2006038145A1
公开(公告)日：2006-04-13
申请号：PCT/IB2005/053154
申请日：2005-09-23
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KOKEN, Peter , ZIEGLER, Andy , GRASS, Michael , KÖHLER, Thomas , PROKSA, Roland
发明人： KOKEN, Peter , ZIEGLER, Andy , GRASS, Michael , KÖHLER, Thomas , PROKSA, Roland
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4085 , A61B6/4291
摘要： A computed tomography method and apparatus are provided wherein a radiation source moves circularly relative to an examination zone about an axis of rotation (14). The radiation source produces a cone beam of x-rays and the focal point of this cone beam is switched between at least two positions (23a, 23b) sapced apart from each other and arranged on a line parallel to the axis of rotation to enlarge the reconstructable examination zone parallel to the axis of rotation. Preferably, the image of the examination zone is reconstructed using an iterative reconstruction method, in particular an algebraic reconstruction method or a maximum likelihood method.
摘要翻译：提供了一种计算机断层摄影方法和装置，其中辐射源围绕旋转轴线（14）相对于检查区域循环移动。辐射源产生X射线的锥形束，并且该锥形束的焦点在至少两个彼此分离的位置（23a，23b）之间切换并且布置在平行于旋转轴线的直线上，以扩大可重建检查区域平行于旋转轴。优选地，使用迭代重建方法，特别是代数重建方法或最大似然方法来重建检查区域的图像。

6. 发明申请

WO2006067671A2 METHOD FOR COMPUTER TOMOGRAPHY, AND COMPUTER TOMOGRAPH 审中-公开
标题翻译：计算机图形学和计算机图形学的方法
公开(公告)号：WO2006067671A2
公开(公告)日：2006-06-29
申请号：PCT/IB2005/054198
申请日：2005-12-13
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , FORTHMANN, Peter , KÖHLER, Thomas , MANZKE, Robert , GRASS, Michael , ZIEGLER, Andy
发明人： FORTHMANN, Peter , KÖHLER, Thomas , MANZKE, Robert , GRASS, Michael , ZIEGLER, Andy
IPC分类号： A61B6/00 , A61B6/03
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503
摘要： According to the invention, there is provided a method of recording images of the heart in computer tomography, in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. Also provided is a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, said computer tomograph comprising a control device which controls a radiation source with different radiation intensities for different movement states. Furthermore provided is a computer program for a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, and for controlling a radiation source with different radiation intensities for different movement states.
摘要翻译：根据本发明，提供了一种在计算机断层摄影中记录心脏图像的方法，其中为了防止运动伪像，基于心脏的相似运动状态重建图像，并且使用不同的辐射强度对于不同的运动状态。还提供了一种用于在计算机断层摄影中记录心脏图像的计算机断层摄影装置，其通过显示相似的心脏运动状态以防止运动伪像的时间窗口，所述计算机断层摄影机包括控制具有不同辐射的辐射源的控制装置不同运动状态的强度。此外还提供了一种用于计算机断层摄影机的计算机程序，用于通过时间窗口在计算机断层摄影中记录心脏的图像，所述时间窗口表现出相似的心脏移动状态以防止运动伪像，并且用于控制具有不同辐射强度的辐射源不同的运动状态。

7. 发明申请

WO2009112998A1 MODEL BASED SELF-POSITIONING PATIENT TABLE FOR X- RAY SYSTEMS 审中-公开
标题翻译：基于模型的X射线系统自定位患者表
公开(公告)号：WO2009112998A1
公开(公告)日：2009-09-17
申请号：PCT/IB2009/050958
申请日：2009-03-09
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , SCHMITT, Holger , VAN STEVENDAAL, Udo , FORTHMANN, Peter , GRASS, Michael
发明人： SCHMITT, Holger , VAN STEVENDAAL, Udo , FORTHMANN, Peter , GRASS, Michael
IPC分类号： A61B6/00 , A61B6/04
CPC分类号： A61B6/0457 , A61B6/4441 , A61B6/465 , A61B6/469 , A61B6/488 , A61B6/547
摘要： A System (24) for positioning a carrier (9) of an object (10) within a field of view of an imaging unit (7b), the system comprising: -an imaging receiving interface unit (14) for receiving image data (22) representing an image (9) of the object (10) from an imaging unit (7b), -an object components position determination unit (15) for determining object components (11, 12) position data (25) representing positions of components (11, 12) of the object (10), -a memory(16) with anatomic model data stored therein, the anatomic model data representing anatomic model (9*) component positions of anatomic model components (11*, 12*) of an atomic model (10*), -a matching unit (17) designed to match object components (11, 12) positions and anatomic model components (11*, 12*) positions based on object components position data and anatomic model data, -an input receiving unit (19) for receiving input data (23) representing a selected component (11) of interest, -a positioning planning unit (18)for determining position shift data representing a direction and a distance by which the carrier (8) is to be shifted, considering the input data, anatomic model data and object components position data, -an interface (20) to a positioning system (21) for shifting the carrier (8) based on the position shift data (27).
摘要翻译：一种用于将物体（10）的载体（9）定位在成像单元（7b）的视野内的系统（24），所述系统包括： - 成像接收接口单元（14），用于接收图像数据（22））表示来自成像单元（7b）的对象（10）的图像（9）， - 对象分量位置确定单元（15），用于确定表示分量位置的对象分量（11,12）位置数据（25）（10）的存储器（16），存储有解剖模型数据的存储器（16），解剖模型数据表示解剖模型组件（11 *，12 *）的解剖模型（9 *）组件位置原子模型（10 *）， - 匹配单元（17），其被设计为基于对象分量位置数据和解剖模型数据来匹配对象分量（11,12）位置和解剖模型分量（11 *，12 *）位置，输入接收单元（19），用于接收表示所选择的所选择的组件（11）的输入数据（23）， - 定位计划单元（18），用于考虑输入数据，解剖模型数据和对象分量位置数据，确定表示载体（8）要移位的方向和距离的位置移位数据， - 到定位系统（21）的接口（20），用于基于位置偏移数据（27）移动载体（8）。

8. 发明申请

WO2006120609A1 CONTINUOUS COMPUTER TOMOGRAPHY PERFORMING SUPER-SHORT-SCANS AND STRONGER WEIGHTING OF MOST RECENT DATA 审中-公开
标题翻译：连续计算机图像执行超短扫描和最新数据的强加权重
公开(公告)号：WO2006120609A1
公开(公告)日：2006-11-16
申请号：PCT/IB2006/051382
申请日：2006-05-03
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , FORTHMANN, Peter , GRASS, Michael
发明人： KÖHLER, Thomas , FORTHMANN, Peter , GRASS, Michael
IPC分类号： A61B6/03 , G01N23/04
CPC分类号： G01T1/2985 , G01N23/046 , G01N2223/419 , G06T11/005 , G06T2211/412 , G06T2211/421 , G06T2211/428
摘要： A computer tomography apparatus and method, a computer-readable medium and a program element are provided for examining a region of interest (ROI) of an object or patient in real-time. When only a region of interest is to be reconstructed, it is sufficient to rotate the radiation source and detector elements such that they cover a circular arc whose extension is less than π+α, α being the beam angle of the radiation source. This scanning range is called super-short-scan. Super-short-scans produce less data. Consequently image reconstruction is quicker which is very preferable for real-time CT. The CT data can furthermore be weighted in a manner that data detected at the end of a super-short-scan are weighted stronger than data detected at the beginning of a super-short-scan.
摘要翻译：提供计算机断层摄影装置和方法，计算机可读介质和程序元素，用于实时检查对象或患者的感兴趣区域（ROI）。当仅需要重建感兴趣的区域时，旋转辐射源和检测器元件就足以覆盖其延伸小于p + a的圆弧，a是辐射源的光束角。该扫描范围称为超短扫描。超短扫描会产生较少的数据。因此，图像重建更快，这对于实时CT是非常优选的。此外，CT数据可以以超短扫描结束时检测到的数据的加权强于在超短扫描开始时检测到的数据的方式进行加权。

9. 发明申请

WO2010001281A1 SPECTRAL CT 审中-公开
标题翻译：光谱CT
公开(公告)号：WO2010001281A1
公开(公告)日：2010-01-07
申请号：PCT/IB2009/052300
申请日：2009-06-01
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , FORTHMANN, Peter , VAN STEVENDAAL, Udo , ROESSL, Ewald , GRASS, Michael , PROKSA, Roland , SCHLOMKA, Jens-Peter
发明人： FORTHMANN, Peter , VAN STEVENDAAL, Udo , ROESSL, Ewald , GRASS, Michael , PROKSA, Roland , SCHLOMKA, Jens-Peter
IPC分类号： A61B6/03 , G01T1/20 , H05G1/60
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482
摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).
摘要翻译：成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

10. 发明申请

WO2005055829A1 COMPUTER TOMOGRAPHY METHOD FOR OBJECTS MOVING PERIODICALLY 审中-公开
标题翻译：用于对象运动的计算机计算机方法
公开(公告)号：WO2005055829A1
公开(公告)日：2005-06-23
申请号：PCT/IB2004/052612
申请日：2004-12-01
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , MANZKE, Robert , GRASS, Michael
发明人： MANZKE, Robert , GRASS, Michael
IPC分类号： A61B6/00
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/469 , A61B6/503 , A61B6/504 , A61B6/541 , G06T2211/412
摘要： The invention relates to a computer tomography method in which a bundle of rays passes through an object that is moving periodically, in particular a heart. During the acquisition of measured values, a movement signal dependent on the movement of the object is sensed. From this movement signal are determined periodically repeated phases of movement, after which a plurality of intermediate images of a region of the object are reconstructed, in particular at a low resolution, using measured values whose times of acquisition were situated in different phases of movement, thus enabling each intermediate image to be assigned to a phase of movement. The phase of movement in which the object moved least in the region is then identified by determining the intermediate image having the fewest motion artifacts. Finally, a computer tomographic image of the region is reconstructed, in particular with a high spatial resolution, from measured values whose times of acquisition were situated in the phase of movement in which there was the least movement by the object in said region.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中一束光线穿过周期性移动的物体，特别是心脏。在获取测量值期间，感测到取决于物体的移动的移动信号。从该移动信号周期性地确定重复的移动相位，之后使用其采集时间位于不同移动阶段的测量值来重构物体区域的多个中间图像，特别是以低分辨率，从而能够将每个中间图像分配给运动阶段。然后通过确定具有最少的运动伪像的中间图像来识别目标在该区域中最小移动的移动阶段。最后，该区域的计算机断层图像，特别是具有高的空间分辨率，从获取时间位于运动阶段的测量值中重建，其中所述区域中物体的运动最少。

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