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1. 发明申请

WO2011048515A2 ACQUISITION PROTOCOL ASSESSMENT APPARATUS 审中-公开
标题翻译：采集协议评估设备
公开(公告)号：WO2011048515A2
公开(公告)日：2011-04-28
申请号：PCT/IB2010/054194
申请日：2010-09-16
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , BERTRAM, Matthias , WIEGERT, Jens , BROWN, Kevin, M.
发明人： BERTRAM, Matthias , WIEGERT, Jens , BROWN, Kevin, M.
IPC分类号： G01T1/02
CPC分类号： G01T1/02 , A61B6/032 , A61B6/544 , G06F19/00
摘要： A method includes generating, via a dose estimator (208), a dose map indicative of an estimated dose deposited for a subject based on acquisition protocol parameter values of an acquisition protocol of an imaging system (100), and generating, via a noise estimator (210), at least one of a noise map indicative of an estimated image noise based on the acquisition protocol parameter values or a contrast-to-noise map based on the noise map and an attenuation map. The method further includes displaying, via a display (216), the dose and noise maps in a human readable format.
摘要翻译：一种方法包括：基于成像系统（100）的采集协议的采集协议参数值，经由剂量估计器（208）产生指示为对象存储的估计剂量的剂量图; ，并且经由噪声估计器（210）基于所述噪声图和衰减图来基于所述采集协议参数值或对比噪声图生成指示估计图像噪声的噪声图中的至少一个。该方法还包括通过显示器（216）以人可读格式显示剂量和噪声图。

2. 发明申请

WO2009141767A1 METHOD AND APPARATUS FOR SCATTER CORRECTION 审中-公开
标题翻译：散热器校正的方法和装置
公开(公告)号：WO2009141767A1
公开(公告)日：2009-11-26
申请号：PCT/IB2009/051988
申请日：2009-05-13
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , BERTRAM, Matthias , WIEGERT, Jens , HOHMANN, Steffen, Gunther
发明人： BERTRAM, Matthias , WIEGERT, Jens , HOHMANN, Steffen, Gunther
IPC分类号： G06T11/00
CPC分类号： G06T11/005
摘要： A method and apparatus of image reconstruction correcting for photon scatter is provided. A direct physical measurement of scattered photons is used in conjunction with a physical model of the photon scattering process to make the corrections.
摘要翻译：提供了一种用于光子散射的图像重建校正方法和装置。散射光子的直接物理测量与光子散射过程的物理模型结合使用以进行校正。

3. 发明申请

WO2011064683A2 ENHANCED IMAGE DATA/DOSE REDUCTION 审中-公开
标题翻译：增强的图像数据/剂量减少
公开(公告)号：WO2011064683A2
公开(公告)日：2011-06-03
申请号：PCT/IB2010/054913
申请日：2010-10-29
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , GOSHEN, Liran , BROWN, Kevin, M. , ZABIC, Stanislav , WIEGERT, Jens , GRINGAUZ, Asher
发明人： GOSHEN, Liran , BROWN, Kevin, M. , ZABIC, Stanislav , WIEGERT, Jens , GRINGAUZ, Asher
IPC分类号： G06T5/00
CPC分类号： G06T5/002 , G06T5/003 , G06T2207/10081 , G06T2207/20012 , G06T2207/30004
摘要： A method includes generating enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data, and a system includes an image quality enhancer (128) that generates enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data.
摘要翻译：一种方法包括基于较低剂量图像数据和预定图像质量阈值来生成增强图像数据，其中增强图像数据的图像质量基本上类似于较高剂量图像数据的图像质量，并且系统包括基于较低剂量图像数据和预定图像质量阈值生成增强图像数据的图像质量增强器（128），其中增强图像数据的图像质量基本上类似于较高剂量图像数据的图像质量

4. 发明申请

WO2007148263A1 METHOD AND SYSTEM FOR ERROR COMPENSATION 审中-公开
标题翻译：错误补偿的方法和系统
公开(公告)号：WO2007148263A1
公开(公告)日：2007-12-27
申请号：PCT/IB2007/052243
申请日：2007-06-13
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N.V. , BERTRAM, Matthias , WIEGERT, Jens , TIMMER, Jan , NOORDHOEK, Nicolaas Jan
发明人： BERTRAM, Matthias , WIEGERT, Jens , TIMMER, Jan , NOORDHOEK, Nicolaas Jan
IPC分类号： G06T5/00 , G06T11/00
CPC分类号： G06T11/005 , G06T5/003 , G06T2207/10081 , G06T2207/30004
摘要： A method for generating a set of kernels for convolution error compensation of a projection image of a physical object recorded by an imaging system comprises calculating the set of kernels in such a way that for each pixel of the projection image an asymmetric scatter distribution for error compensation is calculated representing a X-ray scatter originating along a ray from an X-ray source to the pixel.
摘要翻译：用于生成用于由成像系统记录的物理物体的投影图像的卷积误差补偿的一组内核的方法包括以对投影图像的每个像素进行误差补偿的不对称散布分布的方式来计算该组内核表示沿着从X射线源到像素的射线发生的X射线散射。

5. 发明申请

WO2006070316A1 APPARATUS AND METHOD FOR ARTIFACT CORRECTION OF X-RAY PROJECTIONS 审中-公开
标题翻译：用于X射线投影的文字校正的装置和方法
公开(公告)号：WO2006070316A1
公开(公告)日：2006-07-06
申请号：PCT/IB2005/054356
申请日：2005-12-21
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N.V. , BERTRAM, Matthias , SCHAEFER, Dirk , WIEGERT, Jens
发明人： BERTRAM, Matthias , SCHAEFER, Dirk , WIEGERT, Jens
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2211/424 , G06T2211/432
摘要： The present invention relates to an apparatus for artifact correction of a data set of X-ray projections (10) of an object (1) for generation of a reconstruction image of said object. In particular for correction of artifacts causing cupping or inverse cupping (called capping) shaped spatially slowly varying inhomogeneities caused by e.g. scatter, a wrong truncation extension factor or a wrong gain factor, an apparatus is proposed comprising: an estimation unit (41) for estimating in an X-ray projection (11) the amount of artifact present in said X-ray projection using at least one estimation parameter, a correction unit (41) for correcting said artifact present in the X-ray projection (11) by use of said estimate, - a reconstruction unit (42) for generating an intermediate reconstruction image by use of said data set of X-ray projections (10) including said corrected X-ray projection, and an evaluation unit (43) for evaluating said correction by determining a quantitative measure of inhomogeneity in said intermediate reconstruction image and for optimizing said correction by iteratively repeating said correction using an adjusted estimation parameter determined by use of said quantitative measure until a predetermined stop criterion has been reached.
摘要翻译：本发明涉及用于生成所述对象的重建图像的物体（1）的X射线投影（10）的数据组的伪影校正装置。特别是用于校正由例如引起的杯形或倒杯（称为封盖）形状的空间上缓慢变化的不均匀性的伪影。散射，错误的截断延伸因子或错误的增益因子，提出了一种装置，包括：估计单元（41），用于在X射线投影（11）中估计至少使用所述X射线投影中存在的人造物的量一个估计参数，用于通过使用所述估计来校正存在于X射线投影（11）中的所述伪像的校正单元（41）， - 重建单元（42），用于通过使用所述估计参数的所述数据集来生成中间重建图像包括所述校正的X射线投影的X射线投影（10）和用于通过确定所述中间重建图像中的不均匀性的定量测量来评估所述校正的评估单元（43），并且通过使用通过使用所述定量测量确定的经调整的估计参数，直到达到预定的停止标准。

6. 发明申请

WO2009156943A1 IMAGE GENERATION DEVICE WITH OPTIMIZED DOSE CONTROL 审中-公开
标题翻译：具有优化剂量控制的图像生成装置
公开(公告)号：WO2009156943A1
公开(公告)日：2009-12-30
申请号：PCT/IB2009/052686
申请日：2009-06-23
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , WIEGERT, Jens , BERTRAM, Matthias
发明人： WIEGERT, Jens , BERTRAM, Matthias
IPC分类号： G06T11/00 , A61B6/03
CPC分类号： G06T11/005 , A61B6/032 , A61B6/542
摘要： The present invention relates to an image generation device for generating an image from measured data, wherein image quality is optimized for a region of interest and to an imaging system comprising this image generation device. The image generation device comprises a noise determination unit for determining a distribution of noise in a projection domain of the region of interest, and a dose control unit (32) for determining a dose profile for a radiation source (2) of said image generation device based on said determined distribution of noise by using a noise propagation algorithm. Thereby, signal-to-noise ratio of a reconstructed volume can be improved and is not sensitively dependent on a selected region of interest.
摘要翻译：本发明涉及一种用于根据测量数据产生图像的图像产生装置，其中对于感兴趣的区域和包括该图像生成装置的成像系统优化图像质量。该图像生成装置包括用于确定感兴趣区域的投影域中的噪声分布的噪声确定单元，以及用于确定所述图像生成装置的辐射源（2）的剂量分布的剂量控制单元（32）基于所述确定的噪声分布，使用噪声传播算法。因此，可以改善重建体积的信噪比并且不敏感地依赖于所选择的感兴趣区域。

7. 发明申请

WO2010032163A1 IMAGING APPARATUS INCLUDING CORRECTION UNIT FOR SCATTERED RADIATION 审中-公开
标题翻译：成像装置包括用于散射辐射的校正单元
公开(公告)号：WO2010032163A1
公开(公告)日：2010-03-25
申请号：PCT/IB2009/053936
申请日：2009-09-09
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , WIEGERT, Jens , BERTRAM, Matthias
发明人： WIEGERT, Jens , BERTRAM, Matthias
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , A61B6/027 , A61B6/4291
摘要： The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source (2) for emitting radiation (4) and a detector (6) for measuring the radiation (4) after having traversed the region of interest and for generating measured detection values depending on the measured radiation (4). The imaging apparatus further comprises an attenuation element for attenuating the radiation (4) before traversing the region of interest and an attenuation element scatter values providing unit (12) for providing attenuation element scatter values, which depend on scattering of the radiation (4) caused by the attenuation element. A detection values correction unit (17) corrects the measured detection values based on the provided attenuation element scatter values, and a reconstruction unit (18) reconstructs an image of the region of interest from the corrected detection values.
摘要翻译：本发明涉及一种用于生成对象的感兴趣区域的图像的成像装置。成像设备包括用于发射辐射的辐射源（2）和用于在穿过感兴趣区域之后测量辐射（4）的检测器（6），并且用于根据所测量的辐射（4）产生测量的检测值，。成像装置还包括用于在穿过感兴趣区域之前衰减辐射（4）的衰减元件和用于提供依赖于辐射（4）的散射的衰减元件散射值的衰减元件散射值提供单元（12）通过衰减元件。检测值校正单元（17）基于所提供的衰减元件散射值来校正测量的检测值，并且重建单元（18）从校正的检测值重建感兴趣区域的图像。

8. 发明申请

WO2010058329A1 SYSTEM AND METHOD FOR X-RAY SCATTER CORRECTION 审中-公开
标题翻译：用于X射线散射校正的系统和方法
公开(公告)号：WO2010058329A1
公开(公告)日：2010-05-27
申请号：PCT/IB2009/055032
申请日：2009-11-12
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N.V. , WIESNER, Steffen, G. , BERTRAM, Matthias , WIEGERT, Jens , TIMMER, Jan
发明人： WIESNER, Steffen, G. , BERTRAM, Matthias , WIEGERT, Jens , TIMMER, Jan
IPC分类号： G06T11/00 , G06T5/00
CPC分类号： G06T11/005 , G06T5/003 , G06T2207/10116
摘要： The invention relates to a method of scatter correction of a projection image acquired from an X-ray imaging system. The method is based on estimating an X-ray scatter distribution based on a weighted accumulation of the scatter contribution generated along individual source rays. The method incorporates two weighting functions to account for at least one of the two of a spatial non-uniformity of the X-ray radiation used in the X-ray imaging system and shading effects due to an anti-scatter-grid arranged in the X-ray imaging system.
摘要翻译：本发明涉及从X射线成像系统获取的投影图像的散射校正方法。该方法基于基于沿着各个源光线产生的散射贡献的加权累加来估计X射线散射分布。该方法包含两个加权函数，以解释在X射线成像系统中使用的X射线辐射的空间不均匀性中的至少一个和由于布置在X中的防散射网格引起的阴影效应射线成像系统。

9. 发明申请

WO2009063353A2 MOVABLE WEDGE FOR IMPROVED IMAGE QUALITY IN 3D X-RAY IMAGING 审中-公开
标题翻译：可移动的楔子可提高3D X射线成像的图像质量
公开(公告)号：WO2009063353A2
公开(公告)日：2009-05-22
申请号：PCT/IB2008/054589
申请日：2008-11-04
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , BERTRAM, Matthias , WIEGERT, Jens , VESEL, John, F. , SOWARDS-EMMERD, David , PETRILLO, Michael, J.
发明人： BERTRAM, Matthias , WIEGERT, Jens , VESEL, John, F. , SOWARDS-EMMERD, David , PETRILLO, Michael, J.
IPC分类号： A61B6/03 , G21K3/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/4035 , G21K1/10
摘要： When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.
摘要翻译：当生成对象或患者的3D图像时，锥形束X射线源（20a，20b）被安装到与偏移平板X射线检测器（20a，20b）相对的可旋转机架（14） 22a，22b）。合适材料（例如，铝等）的楔形衰减滤波器（24a，24b）可调节地定位在锥形束中，以根据感兴趣体积的形状，大小和密度选择性地衰减束（18），为了将X射线强度或增益保持在可接受的水平范围内的相对恒定的水平，X射线通过所述水平线（18）。

10. 发明申请

WO2009004523A3 METHOD FOR ELIMINATING SCATTER ARTEFACTS IN COMPUTED TOMOGRAPHY 审中-公开
公开(公告)号：WO2009004523A3
公开(公告)日：2009-01-08
申请号：PCT/IB2008/052482
申请日：2008-06-23
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N.V. , WIEGERT, Jens , BERTRAM, Matthias
发明人： WIEGERT, Jens , BERTRAM, Matthias
IPC分类号： G01T1/164
摘要： A method, a computer program as well as a corresponding apparatus for eliminating scatter artefacts that corrupt an image of an object using computed tomography, wherein X-ray projections of the object are at least partially truncated, whereas the method comprises the steps of: reconstructing a truncated image of the object with a limited field of view from the projections; constructing a model of the object in an extended field of view using the truncated image of the object; deriving a scatter estimate by means of Monte-Carlo simulation using the model of object; correcting a projection of the object for X-ray scatter based on the scatter estimate; reconstructing a scatter-corrected image using the corrected projections.

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