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1. 发明授权

US09996951B2 Computerized tomographic image exposure and reconstruction method 有权
公开(公告)号：US09996951B2
公开(公告)日：2018-06-12
申请号：US15310216
申请日：2015-05-06
申请人： Agfa HealthCare , Universiteit Antwerpen
发明人： Jan Sijbers , Jeroen Cant
IPC分类号： G06K9/00 , G06T11/00 , A61B6/00 , G01N23/04
CPC分类号： G06T11/006 , A61B6/5258 , G01N23/046 , G06T2211/412 , G06T2211/416 , G06T2211/424
摘要： A computerized tomographic image exposure and reconstruction method wherein an object is subjected to irradiation during a relative movement of a source of radiation, the object, and a radiation detector and wherein a digital representation of the radiation image of the object is computed by applying a tomographic reconstruction algorithm to image data read out of the irradiated radiation detector. A number of projection images are generated, each of the projection images being generated by integrating X-ray beams continuously emitted during the relative movement through a predefined movement path, and the created projection images are modeled in a tomographic reconstruction algorithm.

2. 发明授权

US09373180B2 Dynamic tomography angle selection 有权
标题翻译：动态断层摄影角度选择
公开(公告)号：US09373180B2
公开(公告)日：2016-06-21
申请号：US14355286
申请日：2012-10-30
申请人： UNIVERSITEIT ANTWERPEN , CWI
发明人： Kees Joost Batenburg , Jan Sijbers
IPC分类号： G06K9/00 , G06T11/00 , A61B6/00
CPC分类号： G06T11/005 , A61B6/508 , A61B6/583 , G06T2211/424 , G06T2211/436
摘要： A method for determining a projection angle for use in tomographic imaging comprises obtaining projection data including at least one projection view from at least one projection angle. The at least one projection view is generated by scanning a test object with a tomographic imaging device. Each projection view comprises at least one observation value obtained at least one detection location, providing a plurality of candidate projection angles, for each candidate projection angle, calculating a function value indicative of an amount of information that may be gained by adding to the projection data a further projection view generated by scanning of the test object with the tomographic imaging device from the candidate projection angle, and selecting a candidate projection angle from the plurality of candidate projection angles taking into account the function values. A corresponding system and computer program product also is provided.
摘要翻译：用于确定用于断层摄影成像的投影角度的方法包括从至少一个投影角度获得包括至少一个投影视图的投影数据。所述至少一个投影视图是通过用断层图像成像装置扫描测试对象而产生的。每个投影视图包括至少一个观察值，其至少一个检测位置获得，为每个候选投影角度提供多个候选投影角度，计算指示可以通过添加到投影数据获得的信息量的函数值通过从候选投影角度用断层图像成像装置扫描测试对象而产生的另一投影视图，并且考虑到功能值，从多个候选投影角度中选择候选投影角度。还提供了相应的系统和计算机程序产品。

3. 发明授权

US10520452B2 Automated quality control and selection 有权
公开(公告)号：US10520452B2
公开(公告)日：2019-12-31
申请号：US15558671
申请日：2016-03-16
申请人： KATHOLIEKE UNIVERSITEIT LEUVEN , UNIVERSITEIT GENT , UNIVERSITEIT ANTWERPEN
发明人： Mattias Van Dael , Pieter Verboven , Bart Nicolaï , Jelle Dhaene , Luc Van Hoorebeke , Jan Sijbers
IPC分类号： G01N23/046 , G01N33/02 , G06T7/00 , G01N23/18 , H04N13/204
摘要： A non-destructive inspection method for inline inspection of an object comprises moving an object in between a radiation source and an image detector and through a three-dimensional scanner field of view, imaging the object using the image detector to obtain a projection radiograph of an internal structure of the object, scanning an exterior surface of the object using the 3D scanner, fitting a shape model of the object to a point cloud provided by the 3D scanner to obtain a surface model of the exterior surface, creating a solid model of the surface model by taking a grey value distribution of a reference object into account, simulating a reference radiograph from the solid model and comparing the reference and projection radiographs to detect internal deviations of the object.

4. 发明授权

US10859511B2 Mobile imaging of an object using penetrating radiation 有权
公开(公告)号：US10859511B2
公开(公告)日：2020-12-08
申请号：US16093275
申请日：2017-04-06
申请人： UNIVERSITEIT ANTWERPEN
发明人： Jan Sijbers , Jan Jozef Victor De Beenhouwer
IPC分类号： G01N23/04 , G01N23/046 , G01V5/00
摘要： A system for imaging a target object comprises a first unmanned vehicle including a source of penetrating radiation. The first vehicle positions the source such as to direct the radiation toward the target object. A second unmanned vehicle comprises an image detector for registering a spatial distribution of the radiation as an image, in which the second vehicle positions the detector to register the distribution of radiation when transmitted through the target object. These unmanned vehicles are autonomous vehicles adapted for independent propelled motion, and comprise a positioning unit for detecting a position of the vehicle. A processing unit controls the motion of the unmanned vehicles to acquire at least two images corresponding to at least two different projection directions of the radiation through the target object. The processing unit is adapted for generating data representative of an internal structure of the target object from the at least two images.

5. 发明申请

US20140307934A1 Dynamic Tomography Angle Selection 有权
标题翻译：动态断层扫描角度选择
公开(公告)号：US20140307934A1
公开(公告)日：2014-10-16
申请号：US14355286
申请日：2012-10-30
申请人： UNIVERSITEIT ANTWERPEN , CWI
发明人： Kees Joost Batenburg , Jan Sijbers
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , A61B6/508 , A61B6/583 , G06T2211/424 , G06T2211/436
摘要： A method for determining a projection angle for use in tomographic imaging comprises obtaining projection data including at least one projection view from at least one projection angle. The at least one projection view is generated by scanning a test object with a tomographic imaging device. Each projection view comprises at least one observation value obtained at least one detection location, providing a plurality of candidate projection angles, for each candidate projection angle, calculating a function value indicative of an amount of information that may be gained by adding to the projection data a further projection view generated by scanning of the test object with the tomographic imaging device from the candidate projection angle, and selecting a candidate projection angle from the plurality of candidate projection angles taking into account the function values. A corresponding system and computer program product also is provided.
摘要翻译：用于确定用于断层成像成像的投影角度的方法包括从至少一个投影角度获得包括至少一个投影视图的投影数据。所述至少一个投影视图是通过用断层图像成像装置扫描测试对象而产生的。每个投影视图包括至少一个观察值，其至少一个检测位置获得，为每个候选投影角度提供多个候选投影角度，计算指示可以通过添加到投影数据获得的信息量的函数值通过从候选投影角度用断层图像成像装置扫描测试对象而产生的另一投影视图，并且考虑到功能值，从多个候选投影角度中选择候选投影角度。还提供了相应的系统和计算机程序产品。

6. 发明授权

US10945682B2 Geometric misalignment correction method for chest tomosynthesis reconstruction 有权
公开(公告)号：US10945682B2
公开(公告)日：2021-03-16
申请号：US16308303
申请日：2017-06-08
申请人： Agfa Healthcare NV
发明人： Jeroen Cant , Jan Sijbers
IPC分类号： A61B6/02 , A61B6/00 , G06T11/00 , G16H30/40
摘要： A method and system to correct for alignment errors between assumed and actual geometric parameters of an acquisition geometry during image reconstruction in a chest tomosynthesis application includes receiving at least 2 raw projection images acquired on at least 2 different positions in a known acquisition geometry, determining an actual geometric parameter value by determining the minimum of a redundant planes cost function which is calculated for a varying range of the geometric parameter values, and which is determined by: a) at least one plane which intersects an X-ray source trajectory with at least two points, b) an intersection between the planes and a detector surface for which points the source positions are determined, and c) for which the parameters determining the intersection (λ, μ, l) are used for the construction of the cost function, applying the calculated actual geometric parameter value of the acquisition geometry for the image reconstruction of the plurality of images, characterized in that, a weighting function is applied to the plurality of acquired images prior to calculating the cost function.

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