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公开(公告)号：US20150356755A1
公开(公告)日：2015-12-10
申请号：US14758795
申请日：2013-10-31
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Le Shen , Yuxiang Xing , Yuanji Li , Chuqing Feng , Li Zhang , Zhiqiang Chen
CPC classification number: G06T11/005 , A61B6/032 , A61B6/4241 , A61B6/4266 , A61B6/482 , A61B6/5205 , G01N23/046 , G01N2223/419 , G01T1/2985 , G06T5/50 , G06T2207/10081 , G06T2207/20182
Abstract: CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.
Abstract translation: 公开了CT成像系统及其方法。 对物体执行常见的CT扫描以获得常见的CT成像。 根据图像确定感兴趣的区域。 通过光子计数器检测器在多个能量窗口下对感兴趣的区域进行CT扫描。 重建感兴趣区域的高分辨率图像。 通过使用光子计数器检测器来收集多个能量窗口的光子计数投影数据，能量谱的辨别较高，得到的结果更加稳定，因此可将其分解为多个基本函数。
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公开(公告)号：US20150332486A1
公开(公告)日：2015-11-19
申请号：US14708866
申请日：2015-05-11
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Li Zhang , Zhiqiang Chen , Le Shen , Yuxiang Xing , Xin Jin , Qingping Huang
CPC classification number: G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4266 , A61B6/5205 , G06T7/0012 , G06T2207/10081 , G06T2207/30004 , G06T2211/421
Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.
Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。
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13.发明授权公开(公告)号：US12188882B2
公开(公告)日：2025-01-07
申请号：US18052671
申请日：2022-11-04
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Zhiqiang Chen , Li Zhang , Yunda Sun , Zhenhua Zhao , Xin Jin , Le Shen , Wuyang Liang
IPC: G01N23/046 , G01N23/083 , G06T11/00
Abstract: The method includes: receiving an encoder signal and a ray machine output beam signal, and initially synchronizing the encoder signal and the ray machine output beam signal; recording coded value M of the encoder at moment tm, and coded value N of the encoder at moment tm+1, where M, N, and m are integers; determining that duration from the moment tm to the moment tm+1 is an actual output beam time interval T of the ray machine, when it is determined that a difference value between the coded value M and the coded value N satisfies preset value a, a being an integer; determining gap time TG in the actual output beam time interval T based on a preset output beam time interval TJ of the imaging system and the actual output beam time interval T; and controlling the ray machine not to emit beam within the gap time TG.
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Patent Agency Ranking
公开(公告)号：US11768163B2
公开(公告)日：2023-09-26
申请号：US17309684
申请日：2019-09-10
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Li Zhang , Zhiqiang Chen , Qingping Huang , Yunda Sun , Xin Jin , Le Shen , Liang Li , Tiao Zhao
IPC: G01N23/046 , G01V5/00
CPC classification number: G01N23/046 , G01V5/005 , G01N2223/639
Abstract: The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.
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15.发明授权公开(公告)号：US10984565B2
公开(公告)日：2021-04-20
申请号：US16235882
申请日：2018-12-28
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Yuxiang Xing , Kaichao Liang , Le Shen , Li Zhang , Hongkai Yang , Kejun Kang , Zhiqiang Chen , Jianmin Li , Yinong Liu
Abstract: An image processing method, comprising: acquiring, by a CT scanning system, projection data of an object; and processing, by using a convolutional neural network, the projection data, to acquire an estimated image of the object. The convolutional neural network comprises: a projection domain network for processing input projection data to obtain estimated projection data; an analytical reconstruction network layer for performing analytical reconstruction to obtain a reconstructed image; an image domain network for processing the reconstructed image to obtain an estimated image, a projection layer for performing a projection operation by using a system projection matrix of the CT scanning system, to obtain a projection result of the estimated image; and a statistical model layer for determining consistency among the input projection data, the estimated projection data, and the projection result of the estimated image based on a statistical model.
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公开(公告)号：US09495772B2
公开(公告)日：2016-11-15
申请号：US14758795
申请日：2013-10-31
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Le Shen , Yuxiang Xing , Yuanji Li , Chuqing Feng , Li Zhang , Zhiqiang Chen
CPC classification number: G06T11/005 , A61B6/032 , A61B6/4241 , A61B6/4266 , A61B6/482 , A61B6/5205 , G01N23/046 , G01N2223/419 , G01T1/2985 , G06T5/50 , G06T2207/10081 , G06T2207/20182
Abstract: CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.
Abstract translation: 公开了CT成像系统及其方法。 对物体执行常见的CT扫描以获得常见的CT成像。 根据图像确定感兴趣的区域。 通过光子计数器检测器在多个能量窗口下对感兴趣的区域进行CT扫描。 重建感兴趣区域的高分辨率图像。 通过使用光子计数器检测器来收集多个能量窗口的光子计数投影数据，能量谱的辨别较高，得到的结果更加稳定，因此可将其分解为多个基本函数。
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公开(公告)号：US09466137B2
公开(公告)日：2016-10-11
申请号：US14708866
申请日：2015-05-11
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Li Zhang , Zhiqiang Chen , Le Shen , Yuxiang Xing , Xin Jin , Qingping Huang
CPC classification number: G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4266 , A61B6/5205 , G06T7/0012 , G06T2207/10081 , G06T2207/30004 , G06T2211/421
Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.
Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。
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公开(公告)号：US20150332498A1
公开(公告)日：2015-11-19
申请号：US14711949
申请日：2015-05-14
Applicant: Nuctech Company Limited
Inventor： Li Zhang , Zhiqiang Chen , Qingping Huang , Yunda Sun , Zhi Tang , Le Shen , Hu Tang , Qianlu Ren , Xin Jin
CPC classification number: G06T17/00 , A61B6/032 , A61B6/463 , A61B6/466 , A61B6/5205 , A61B6/5223 , G01N23/046 , G06T11/003 , G06T19/003 , G06T2207/10081 , G06T2207/10124 , G06T2207/30004 , G06T2207/30196 , G06T2210/41 , G06T2211/436 , G06T2219/016 , G06T2219/028 , G06T2219/2004
Abstract: The present disclosure discloses an image display method in a CT system. The method comprises: implementing CT scanning on an inspected object, to obtain CT projection data; organizing the CT projection data according to a predetermined interval; extracting basic data from the organized CT projection data by using a fixed angle as a start angle and using 360 degrees as an interval; forming a DR image based on the extracted basic data; reconstructing a three-dimensional image of the inspected object from the CT projection data; and displaying the DR image and the reconstructed three-dimensional image on a screen at the same time. In the solution, the CT data is processed to obtain DR data. After the DR data is obtained, a DR image is obtained directly using a DR data processing algorithm. This enables an image recognizer to more accurately and more rapidly inspect goods carried by a passenger using the existing experience in image recognition of the DR image.
Abstract translation: 本公开公开了一种CT系统中的图像显示方法。 该方法包括：对检测对象进行CT扫描，获得CT投影数据; 根据预定间隔组织CT投影数据; 通过使用固定角度作为起始角度并以360度为间隔从有组织的CT投影数据提取基本数据; 基于所提取的基本数据形成DR图像; 从CT投影数据重构检查对象的三维图像; 同时在屏幕上显示DR图像和重构的三维图像。 在解决方案中，处理CT数据以获得DR数据。 在获得DR数据之后，使用DR数据处理算法直接获得DR图像。 这使得图像识别器可以使用DR图像的图像识别中的现有经验更准确和更快速地检查乘客携带的货物。
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