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1. 发明申请

WO2005006257A3 AN IMAGING SYSTEM, AN X-RAY IMAGING APPARATUS, A METHOD AND A COMPUTER PROGRAM ARRANGED FOR REDUCING AN ARTIFACT IN A THREE-DIMENSIONAL RECONSTRUCTED VOLUME 审中-公开
标题翻译：一种用于减少三维重建体积中的伪影的成像系统，X射线成像装置，方法和计算机程序
公开(公告)号：WO2005006257A3
公开(公告)日：2005-10-27
申请号：PCT/IB2004051135
申请日：2004-07-06
申请人： KONINKL PHILIPS ELECTRONICS NV , VAN DE HAAR PETER G , TIMMER JAN
发明人： VAN DE HAAR PETER G , TIMMER JAN
IPC分类号： A61B6/00 , A61B6/02 , G06T5/00 , G06T11/00
CPC分类号： A61B6/4225 , A61B6/583 , A61B6/585 , G06T5/009 , G06T5/50 , G06T2200/04 , G06T2207/10116
摘要： The invention relates to an imaging system (15) comprising artifact reduction means (20) arranged to correct for a ring-shaped artifact in the three-dimensional reconstructed volume. The artifact reduction means (20) comprises a first stage correction means (21) arranged to eliminate the structured noise of the output screen of the image intensifier of an X-ray imaging apparatus (10) using a first corrective image. Preferably, the first corrective image (21a) is pre-calculated and is stored in a suitable memory unit of a computer (not shown). A raw image of the patient is first processed with the first corrective image (21a). The thus obtained gain-corrected image is forwarded to an image deformation correction means (23), where a suitable unwarping function (23a) is being pre-stored. The resulting gain-corrected unwarped images are then made available to the second stage gain correction means (25), where a second corrective image (25a) is applied to the images resulting in a final set of images with a substantially reduced ring-shaped artifact. The final set of images is made available to the image reconstruction means (26) arranged for further processing of the final set of images, the result thereof being visualized on a computer monitor (30) for inspection purposes. The invention further relates to an X-ray imaging apparatus, a method for reducing an artifact in a three-dimensional reconstructed volume and a computer program.
摘要翻译：本发明涉及包括伪影减少装置（20）的成像系统（15），所述伪影减少装置（20）被布置成校正三维重建体积中的环形伪影。伪影减少装置（20）包括第一级校正装置（21），其被布置为使用第一校正图像来消除X射线成像设备（10）的图像增强器的输出屏幕的结构化噪声。优选地，第一校正图像（21a）被预先计算并且被存储在计算机（未示出）的合适的存储单元中。首先用第一矫正图像处理患者的原始图像（21a）。如此获得的经增益校正的图像被传送到图像变形校正装置（23），在该图像变形校正装置中预先存储了合适的非扭曲函数（23a）。然后使得到的经增益校正的未变形图像可用于第二级增益校正装置（25），其中第二校正图像（25a）被应用于图像，导致具有显着减小的环形伪影的最终图像组。最后一组图像可用于图像重构装置（26），该图像重建装置（26）被布置用于进一步处理最终图像集合，其结果在计算机监视器（30）上可视化以用于检查目的。本发明还涉及一种X射线成像装置，一种用于减少三维重建体积中的伪影的方法以及一种计算机程序。

2. 发明申请

WO2007113703A3 TARGETING METHOD, TARGETING DEVICE, COMPUTER READABLE MEDIUM AND PROGRAM ELEMENT 审中-公开
标题翻译：目标方法，目标设备，计算机可读介质和程序元素
公开(公告)号：WO2007113703A3
公开(公告)日：2008-07-10
申请号：PCT/IB2007050890
申请日：2007-03-15
申请人： KONINKL PHILIPS ELECTRONICS NV , HOMAN ROBERT JOHANNES FREDERIK , BABIC DRAZENKO , MIELEKAMP PIETER MARIA , TIMMER JAN
发明人： HOMAN ROBERT JOHANNES FREDERIK , BABIC DRAZENKO , MIELEKAMP PIETER MARIA , TIMMER JAN
IPC分类号： A61B17/34
CPC分类号： A61B90/36 , A61B6/4441 , A61B34/10 , A61B2018/2025 , A61B2034/107 , A61B2090/364 , A61B2090/366
摘要： According to an exemplary embodiment a targeting method for targeting a first object from an entry point to a target point in an object (110) under examination is provided, wherein the method comprises selecting a two-dimensional image (301) of the object under examination depicting the entry point (305) and the target point (303) and determining a planned path (304) from the entry point to the target point, wherein the planned path has a first direction. Furthermore, the method comprises recording data representing a fluoroscopic image of the object under examination, wherein the fluoroscopic image is recorded under a second direction so that a normal of the image coincide with the first direction and determining whether the first object is on the determined planned path based on shape and/or position of the projection of the first object in the fluoroscopic image.
摘要翻译：根据示例性实施例，提供了一种用于将第一对象从检查对象（110）中的入口点定位到目标点的目标方法，其中所述方法包括选择被检查对象的二维图像（301）描绘入口点（305）和目标点（303），并从入口点到目标点确定计划路径（304），其中计划路径具有第一方向。此外，该方法包括记录表示所检查对象的透视图像的数据，其中在第二方向上记录荧光镜图像，使得图像的法线与第一方向一致并且确定第一对象是否在确定的计划基于第一对象在透视图像中的投影的形状和/或位置的路径。

3. 发明申请

WO2005008586A2 METAL ARTIFACT CORRECTION IN COMPUTED TOMOGRAPHY 审中-公开
标题翻译：计算机图像中的金属艺术矫正
公开(公告)号：WO2005008586A2
公开(公告)日：2005-01-27
申请号：PCT/IB2004002325
申请日：2004-07-16
申请人： KONINKL PHILIPS ELECTRONICS NV , TIMMER JAN , PHILIPS CORP
发明人： TIMMER JAN
IPC分类号： G06T5/00 , G06T11/00
CPC分类号： G06T11/005 , G06T5/005 , G06T7/13 , G06T2207/10081 , G06T2207/20192 , G06T2207/30004 , Y10S378/901
摘要： An artifact correcting image reconstruction apparatus includes a reconstruction processor (70) that reconstructs acquired projection data (60) into an uncorrected reconstructed image (74). A classifying processor (78) classifies pixels of the uncorrected reconstructed image (74) at least into high, medium, and low density pixel classes. A pixel replacement processor (88) replaces pixels of the uncorrected reconstructed image (74) that are of the high density and low density classes with pixel values of the low density pixel class to generate a synthetic image (90). A forward projecting processor (94) forward projects the synthetic image (90) to generate synthetic projection data (96). A projection replacement processor (100, 110) replaces acquired projection data (60) contributing to the pixels of the high density class with corresponding synthetic projection data (96) to generate corrected projection data (112). The reconstruction processor (70) reconstructs the corrected projection data (112) into a corrected reconstructed image (120).
摘要翻译：伪像校正图像重建装置包括将获取的投影数据（60）重建成未校正的重建图像（74）的重建处理器（70）。分类处理器（78）将未校正的重建图像（74）的像素至少分类为高，中和低密度像素类。像素替换处理器（88）用低密度像素类别的像素值代替具有高密度和低密度等级的未校正重建图像（74）的像素，以生成合成图像（90）。前向投影处理器（94）向前投影合成图像（90）以产生合成投影数据（96）。投影替换处理器（100,110）用对应的合成投影数据（96）代替对高密度类别的像素有贡献的所获取的投影数据（60），以产生校正的投影数据（112）。重建处理器（70）将经校正的投影数据（112）重建为校正后的重建图像（120）。

4. 发明专利

JP2000051198A COMPUTER TOMOGRAPHIC IMAGING DEVICE USING CONE RADIATION BEAM AND SPIRAL SCAN TRAJECTORY 失效
公开(公告)号：JP2000051198A
公开(公告)日：2000-02-22
申请号：JP22020999
申请日：1999-08-03
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： PROKSA ROLAND , TIMMER JAN
IPC分类号： A61B6/03 , G01N23/04
摘要： PROBLEM TO BE SOLVED: To enable accurate reconstitution of an absorption distribution in an inspection zone by making a connection line cross two edges of a detector window mutually shifted in the direction of a rotation axis from a radiation source to two parts of a spiral shifted by a specified distance in the direction of the rotation axis. SOLUTION: It is assumed that a radiation source S is moved along a spiral trajectory 17 and an inspection zone is static. A cone-shape radiation beam 4 discharged by the radiation source S comes in a detector unit, placed to the other side of the inspection zone, with the center coincident with the central light vertically crossed to the rotation axis 14. The radiation beam 4 is considered to be constituted of plural fan-shape beams 400 extended in parallel with the rotation axis 14 and crossed in the radiation source S. Lines connected to two edges of a detector window shifted in the rotation axis 14 from the radiation source S are made cross two parts of the spiral trajectory 17 shifted by (2n+1)p in the direction of the rotation axis 14, where (n) is an integer not lower than 1 and (p) is the displacement of the trajectory 17 in the axis direction.

5. 发明申请

WO0038115A2 DERIVING DIMENSIONS OF A DETAIL OF AN OBJECT 审中-公开
标题翻译：物体细节的尺寸
公开(公告)号：WO0038115A2
公开(公告)日：2000-06-29
申请号：PCT/EP9909813
申请日：1999-12-09
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： WILTING JANTJE E , TIMMER JAN
IPC分类号： G01R33/32 , A61B5/055 , A61B6/03 , A61B8/00 , A61B8/06 , G06T1/00 , G06T7/60
CPC分类号： G06T7/60 , G06T2207/10116 , Y10S128/916
摘要： The size of a detail of an object is derived from a data set of data values relating to the object. The data set assigns the data values to positions in a multidimensional space. A preferential direction is selected in the multidimensional space. The spatial resolution of the data set is higher in the preferential direction as compared to the spatial resolution in other directions. The size of the detail is derived from data values in the preferential direction. Preferably, the preferential direction extends along the line of intersection which intersects a scanning plane in which the data values are acquired and a transverse plane; the transverse plane extends at right angles to the longitudinal axis of the detail. The data values are acquired notably by means of an X-ray computed tomography system.
摘要翻译：来自与对象相关的数据值的数据集的对象的细节的大小。数据集将数据值分配给多维空间中的位置。在多维空间中选择优先方向。与其他方向上的空间分辨率相比，数据集的空间分辨率在优先方向上较高。细节的大小是从优先方向的数据值导出的。优选地，优选方向沿着与获取数据值的扫描平面相交的交叉线和横向平面延伸; 横向平面与细节的纵向轴线成直角延伸。通过X射线计算机断层摄影系统显着获得数据值。

6. 发明专利

DE69932037T2 未知
公开(公告)号：DE69932037T2
公开(公告)日：2007-06-28
申请号：DE69932037
申请日：1999-12-09
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： WILTING E , TIMMER JAN
IPC分类号： G01R33/32 , G06T7/60 , A61B5/055 , A61B6/03 , A61B8/00 , A61B8/06 , G06T1/00

7. 发明专利

DE60030407D1 未知
公开(公告)号：DE60030407D1
公开(公告)日：2006-10-12
申请号：DE60030407
申请日：2000-09-28
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： TIMMER JAN , WILTING E
IPC分类号： A61B6/03 , G06T11/00 , G06T1/00 , G06T15/00

8. 发明专利

AT385333T 未知
公开(公告)号：AT385333T
公开(公告)日：2008-02-15
申请号：AT04743986
申请日：2004-07-16
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： TIMMER JAN
IPC分类号： G06T5/00 , G06T11/00
摘要： An artifact correcting image reconstruction apparatus includes a reconstruction processor ( 70 ) that reconstructs acquired projection data ( 60 ) into an uncorrected reconstructed image ( 74 ). A classifying processor ( 78 ) classifies pixels of the uncorrected reconstructed image ( 74 ) at least into high, medium, and low density pixel classes. A pixel replacement processor ( 88 ) replaces pixels of the uncorrected reconstructed image ( 74 ) that are of the high density and low density classes with pixel values of the low density pixel class to generate a synthetic image ( 90 ). A forward projecting processor ( 94 ) forward projects the synthetic image ( 90 ) to generate synthetic projection data ( 96 ). A projection replacement processor ( 100, 110 ) replaces acquired projection data ( 60 ) contributing to the pixels of the high density class with corresponding synthetic projection data ( 96 ) to generate corrected projection data ( 112 ). The reconstruction processor ( 70 ) reconstructs the corrected projection data ( 112 ) into a corrected reconstructed image ( 120 ).

9. 发明专利

DE69717780T2 未知
公开(公告)号：DE69717780T2
公开(公告)日：2003-07-17
申请号：DE69717780
申请日：1997-07-04
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： TIMMER JAN
IPC分类号： A61B6/03 , G06T1/00 , G06T5/00 , G06T11/00
摘要： A computer tomography device is provided with a reconstruction unit (1) for deriving brightness values of an image from density values. An image processing system (2) for deriving corrected brightness values from the brightness values of the image is arranged to calculate the variation of brightness values of the image in the radial direction and in the tangential direction. The image processing system is also arranged to calculate the deviation between the variation in the radial direction and the variation in the tangential direction and to derive corrected brightness values from brightness values of the image and the deviation.

10. 发明专利

DE60222412D1 COMPUTERTOMOGRAPHIESYSTEM MIT FILTERUNG 未知
公开(公告)号：DE60222412D1
公开(公告)日：2007-10-25
申请号：DE60222412
申请日：2002-05-07
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： TIMMER JAN
IPC分类号： A61B6/03 , G06T11/00 , G01N23/04 , G06T1/00
摘要： A computed-tomography system comprises a data-processing system arranged to receive attenuation profiles for respective orientations. A lowest representative noise level of the individual attenuation profiles is determined The attenuation profiles are filtered in dependence of said lowest representative noise level. In particular it is achieved that the filtered attenuation profiles have the lowest maximum noise level among the received attenuation profiles.

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