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1. 发明授权

EP3221848B1 X-RAY IMAGING DEVICE FOR AN OBJECT 有权
公开(公告)号：EP3221848B1
公开(公告)日：2018-11-21
申请号：EP16767213.8
申请日：2016-09-14
申请人： Koninklijke Philips N.V.
发明人： BRENDEL, Bernhard Johannes , SHECHTER, Gilad , GOSHEN, Liran , KOEHLER, Thomas
IPC分类号： G06T11/00
CPC分类号： G06T5/002 , A61B6/482 , A61B6/5282 , G06T5/50 , G06T11/005 , G06T2207/10081 , G06T2211/408
摘要： The invention relates to an X-ray imaging device (10) for an object, an X-ray imaging system (100) for an object, an X-ray imaging method for an object, and a computer program element for controlling such device or system and a computer readable medium having stored such computer program element. The X-ray imaging device (10) comprises a receiving unit (11) and a processing unit (12). The receiving unit (11) is configured to receive attenuation data representing attenuation properties of the object for at least two different X-ray spectra. The processing unit (12) is configured to decompose the attenuation data into decomposed data, to reduce noise in the decomposed data to obtain de-noised data, to back-convert the de-noised data into back-converted attenuation data, to combine back-converted attenuation data and the attenuation data into combined attenuation data, and to decompose the combined attenuation data into combined decomposed data.

2. 发明公开

EP3400876A1 AUTOMATIC ESTIMATING AND REDUCING SCATTERING IN COMPUTED TOMOGRAPHY SCANS 有权转让
公开(公告)号：EP3400876A1
公开(公告)日：2018-11-14
申请号：EP18170587.2
申请日：2018-05-03
申请人： Varian Medical Systems Inc
发明人： MASLOWSKI, Alexander , WANG, Adam , STAR-LACK, Josh , SUN, Mingshan , WAREING, Todd
IPC分类号： A61B6/00 , G01N23/046 , G06T5/00 , G06T11/00 , A61B6/03 , G09B23/28 , G21K1/10 , G21K5/04
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4035 , A61B6/4085 , A61B6/483 , G01N23/046 , G06T5/00 , G06T5/002 , G06T7/0012 , G06T11/005 , G06T11/20 , G06T2207/10081 , G09B23/286 , G21K1/10 , G21K5/04
摘要： In accordance with at least some embodiments of the present disclosure, a process to estimate scattered radiation contained in x-ray projections for computed tomography (CT) reconstruction is provided. The process may construct an object model 215 based on a plurality of projection images 205 generated by CT scanning of an object using an x-ray radiation source and a detector panel. The process may construct 230 a virtual radiation source based on the x-ray radiation source, and a virtual detector panel based on the detector panel. The process may perform a simulated CT scanning 220 of the object model by simulating macroscopic behavior of particles being emitted from the virtual radiation source, passing through the object model, and being detected by the virtual detector panel. And the process may generate a simulated scatter image based on a first subset of particles scattered during the simulated CT scanning of the object model.

3. 发明公开

EP3187112A4 STATIC REAL-TIME CT IMAGING SYSTEM AND IMAGING CONTROL METHOD 有权
公开(公告)号：EP3187112A4
公开(公告)日：2018-05-09
申请号：EP15835959
申请日：2015-08-25
申请人： NANOVISION TECH BEIJING CO LTD
发明人： CAO HONGGUANG , LI YUNXIANG , CHANG TONG , CUI ZHILI , ZHENG HAILIANG
IPC分类号： A61B6/03 , A61B6/00 , G01N23/04 , G01T1/29
CPC分类号： A61B6/032 , A61B6/03 , A61B6/0407 , A61B6/06 , A61B6/4007 , A61B6/4241 , A61B6/4266 , A61B6/4275 , A61B6/486 , A61B6/5282 , G01N23/04 , G01T1/29
摘要： The present invention discloses a stationary real-time CT imaging system, comprising an annular photon counting detector, an annular scanning x-ray source, and a scanning sequence controller. Under the control of the scanning sequence controller, the annular scanning x-ray source emits a narrow-beam x-ray, and the x-ray penetrates the object being tested and projects onto the corresponding annular photon counting detector. The annular photon counting detector delivers the corresponding exposure information through the main scanning machine and the main controlling unit to a CT main machine and a human-machine interface unit. The image reconstruction is completed in the CT main machine and the human-machine interface unit. By electronically controlling and switching x-ray projection positions in order, the scanning speed is enhanced by tens of times, thereby obtaining dynamic 3D images. The use of the photon counting detector enables the access to absorption data and energy data, thereby allows for real-time data reconstruction. By using the narrow-beam x-ray, good quality images can be obtained using one tenth of the dosage of traditional CT imaging systems, thereby preventing patients from being over-radiated.

4. 发明公开

EP3314307A1 SCATTER ESTIMATION AND/OR CORRECTION IN X-RAY IMAGING 有权
标题翻译： X射线成像中的散射估计和/或校正
公开(公告)号：EP3314307A1
公开(公告)日：2018-05-02
申请号：EP15896485.8
申请日：2015-10-08
申请人： Prismatic Sensors AB
发明人： DANIELSSON, Mats , HOFFMAN, David Michael
IPC分类号： G01T1/24 , A61B6/00 , G01T1/29 , G01T1/36
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4233 , A61B6/4241 , A61B6/4266 , A61B6/4291 , G01T1/2985
摘要： Disclosed are methods and devices for estimating object scatter and/or internal scatter in a multi-level photon-counting x-ray detector, as well as x-ray tomographic imaging while correcting for object and internal scatter. The x-ray detector has at least two layers of detector diodes mounted in an edge-on geometry, e.g. designed for 1) estimating the object scatter contribution to the counts in a top layer of the at least two layers based on difference(s) in counts between the top layer and lower layer(s) under the assumption the object scatter has a slowly varying spatial distribution, and/or 2) estimating counts from reabsorption of photons that have Compton scattered inside the detector based on selectively blinding some detector elements from primary radiation by placing a highly attenuating beam stop on top of the detector elements, in lower layer(s) or in both top layer and lower layer(s), and measuring the counts in those detector elements.

5. 发明授权

EP2979636B1 RADIATION IMAGE PROCESSING DEVICE, RADIATION IMAGE PROCESSING METHOD AND PROGRAM 有权
标题翻译：辐射图像处理装置，辐射图像处理方法和程序
公开(公告)号：EP2979636B1
公开(公告)日：2018-04-25
申请号：EP14773093.1
申请日：2014-03-06
申请人： Fujifilm Corporation
发明人： IMAI, Yoshiro
IPC分类号： G06T5/10
CPC分类号： G06T7/0012 , A61B6/5282 , G06K9/4604 , G06T5/002 , G06T5/10 , G06T5/50 , G06T2207/10116 , G06T2207/20016 , G06T2207/20048 , G06T2207/20221 , G06T2207/20224 , G06T2207/30004 , G06T2207/30061 , G06T2210/41
摘要： It is possible to allow image processing on a radiation image such that the same effect of scattered radiation elimination as when imaging is actually performed using a grid is obtained. When performing processing for eliminating scattered radiation included in radiation transmitted through a subject M on a radiation image imaged by irradiating the subject M with radiation, a characteristic acquisition unit 32 acquires a virtual grid characteristic as a characteristic of a virtual grid assumed to be used to eliminate scattered radiation at the time of imaging of the radiation image. A scattered radiation elimination unit 36 performs scattered radiation elimination processing of the radiation image based on the virtual grid characteristic.

6. 发明公开

EP3301650A1 IMAGE PROCESSING APPARATUS, IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, AND PROGRAM 有权
标题翻译：图像处理装置，图像处理系统，图像处理方法和程序
公开(公告)号：EP3301650A1
公开(公告)日：2018-04-04
申请号：EP17197274.8
申请日：2016-02-25
申请人： CANON KABUSHIKI KAISHA
发明人： NODA, Takeshi , NAKASHOJI, Yukari
IPC分类号： G06T11/00 , A61B6/00
CPC分类号： A61B6/5282 , A61B6/032 , G06F19/00 , G06F19/321 , G06T11/005
摘要： An image processing apparatus acquires a radiation image obtained by irradiating an object with a radiation from a radiation generating apparatus. The image processing apparatus estimates a scattered radiation component and a primary radiation component included in the acquired radiation image, wherein the image processing means is arranged to approximate an intensity of a scattered radiation which is a radiation scattered on a path from the radiation generating apparatus to a radiation detecting element for providing a pixel value of the acquired radiation image, for a path by using a plurality of scattered radiation models having different attenuation distances on the path, and further perform the approximation on the pixel value corresponding to an output from the radiation detecting elements to estimate the scattered radiation component and the primary radiation component. The image processing apparatus outputs a corrected image based on the primary radiation component.
摘要翻译：图像处理设备获取通过利用来自放射线生成设备的放射线照射对象而获得的放射线图像。图像处理设备估计包括在所获取的放射线图像中的散射辐射分量和初级辐射分量，其中图像处理装置被设置成近似散射辐射的强度，该散射辐射是散射在从放射线产生设备到放射线检测元件，用于通过使用路径上具有不同衰减距离的多个散射放射线模型来提供所获取的放射线图像的像素值，并且还对与来自放射线的输出相对应的像素值进行近似检测元件以估计散射辐射分量和主辐射分量。图像处理设备基于主辐射分量输出校正图像。

7. 发明公开

EP3201653A1 IMPROVEMENTS RELATING TO SCATTER IN X-RAY APPARATUS AND METHODS OF THEIR USE 审中-公开
标题翻译：有关X射线装置中散射体的改进及其使用方法
公开(公告)号：EP3201653A1
公开(公告)日：2017-08-09
申请号：EP15794219.4
申请日：2015-10-05
申请人： Ibex Innovations Ltd.
发明人： SCOTT, Paul , GIBSON, Gary , LOXLEY, Neil
IPC分类号： G01T1/29 , A61B6/00
CPC分类号： A61B6/5282 , A61B6/4291 , G01T1/2985 , G06F19/00 , G06F19/321 , G06T5/002 , G06T7/0012 , G06T2207/10116 , G06T2207/20182
摘要： An x-ray apparatus comprises an x-ray source and an x-ray detector and there between a member that is configured to perturb x-ray photons incident thereon. The apparatus further comprises a first database of values representative of material type and material thicknesses, a second database of scatter radiation values indicative of material type and/or material thicknesses, a processor configured to perform an algorithm which compares the output signal of the x-ray detector with values in the first database and to output a most likely material and/or thickness from the first database; selects from the second database the scatter radiation associated with the material type and/or material thickness; and removes the scatter radiation from an output signal of the x-ray detector.
摘要翻译：一种x射线装置包括一个x射线源和一个x射线探测器。源与探测器之间是一个扰动X射线光子特性的成员。这方面的例子包括半透明，旋转或移动薄片，具有不同厚度区域的多吸收板（MAP），波形记忆金属或准直器形状的压电控制。第一个数据库记录代表材料类型和材料厚度的信号输出值。第二个数据库存储指示材料类型和/或材料厚度的分散内核。算法将X射线探测器的输出信号与第一数据库中的值进行比较，以从第一数据库输出最可能的材料和/或厚度; 从第二数据库中选择与材料类型和/或材料厚度相关联的散射内核; 并从X射线检测器的输出信号中去除散射辐射。该算法还可以将散射信号添加到输出，就好像它是直接辐射和迭代一样。

8. 发明公开

EP3187112A1 STATIC REAL-TIME CT IMAGING SYSTEM AND IMAGING CONTROL METHOD 有权
标题翻译：静态实时CT成像系统和成像控制方法
公开(公告)号：EP3187112A1
公开(公告)日：2017-07-05
申请号：EP15835959.6
申请日：2015-08-25
申请人： Nanovision Technology (Beijing) Co., Ltd.
发明人： CAO, Hongguang , LI, Yunxiang , CHANG, Tong , CUI, Zhili , ZHENG, Hailiang
IPC分类号： A61B6/03 , G01N23/04 , G01T1/29
CPC分类号： A61B6/032 , A61B6/03 , A61B6/0407 , A61B6/06 , A61B6/4007 , A61B6/4241 , A61B6/4266 , A61B6/4275 , A61B6/486 , A61B6/5282 , G01N23/04 , G01T1/29
摘要： The present invention discloses a stationary real-time CT imaging system, comprising an annular photon counting detector, an annular scanning x-ray source, and a scanning sequence controller. Under the control of the scanning sequence controller, the annular scanning x-ray source emits a narrow-beam x-ray, and the x-ray penetrates the object being tested and projects onto the corresponding annular photon counting detector. The annular photon counting detector delivers the corresponding exposure information through the main scanning machine and the main controlling unit to a CT main machine and a human-machine interface unit. The image reconstruction is completed in the CT main machine and the human-machine interface unit. By electronically controlling and switching x-ray projection positions in order, the scanning speed is enhanced by tens of times, thereby obtaining dynamic 3D images. The use of the photon counting detector enables the access to absorption data and energy data, thereby allows for real-time data reconstruction. By using the narrow-beam x-ray, good quality images can be obtained using one tenth of the dosage of traditional CT imaging systems, thereby preventing patients from being over-radiated.
摘要翻译：本发明公开了一种静态实时CT成像系统，包括环形光子计数检测器，环形扫描X射线源和扫描顺序控制器。在扫描序列控制器的控制下，环形扫描X射线源发射窄光束X射线，并且X射线穿透被测试物体并投射到相应的环形光子计数检测器上。环形光子计数检测器通过主扫描机和主控制单元将相应的曝光信息传送给CT主机和人机界面单元。图像重建在CT主机和人机界面单元完成。通过依次电子控制和切换X射线投影位置，扫描速度提高数十倍，从而获得动态3D图像。使用光子计数检测器可以访问吸收数据和能量数据，从而可以进行实时数据重建。通过使用窄光束X射线，可以使用传统CT成像系统的十分之一的剂量获得高质量的图像，从而防止患者过度辐射。

9. 发明授权

EP1926431B1 DIRECT MEASURING AND CORRECTION OF SCATTER FOR CT 失效转让
标题翻译：直接测量和CT加宽改正
公开(公告)号：EP1926431B1
公开(公告)日：2014-07-02
申请号：EP06795859.5
申请日：2006-09-01
申请人： Philips Intellectual Property & Standards GmbH , Koninklijke Philips N.V.
发明人： PROKSA, Roland
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4291 , A61B6/5282

10. 发明公开

EP2633814A4 RADIOGRAPHY SYSTEM AND RADIOGRAPH GENERATION METHOD 审中-公开
标题翻译： X线和无线电图的生产工艺
公开(公告)号：EP2633814A4
公开(公告)日：2014-03-19
申请号：EP11836273
申请日：2011-10-25
申请人： FUJIFILM CORP
发明人： ISHII HIROYASU
IPC分类号： A61B6/00
CPC分类号： A61B6/4291 , A61B6/4233 , A61B6/4452 , A61B6/4464 , A61B6/484 , A61B6/502 , A61B6/5282 , G01N23/04

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