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1. 发明授权

US10410382B2 Reconstructing image 有权
公开(公告)号：US10410382B2
公开(公告)日：2019-09-10
申请号：US15708510
申请日：2017-09-19
申请人： Shenyang Neusoft Medical Systems Co., Ltd.
发明人： Zhipeng Sun , Shaolian Liu , Ming Li
IPC分类号： G06K9/00 , G06T11/00 , G01T1/29
摘要： Method, systems and machine-readable storage mediums for reconstructing images are provided. In one aspect, a method includes: acquiring data of a response line, the data including an actual energy parameter of each of photons in a photon pair corresponding to the response line, the actual energy parameter being detected by a detector and within a preset energy range, determining an energy factor of the response line according to the actual energy parameter of each of the photons in the photon pair and a theoretical energy parameter of the photon, obtaining a system parameter according to the energy factor, the system parameter including an element indicating a probability that a photon pair generated in a region of a subject corresponding to an image voxel is received by the detector, constructing a system response model with the system parameter, and reconstructing an image based on the system response model.

2. 发明申请

US20170103551A1 RECONSTRUCTION AND COMBINATION OF PET MULTI-BED IMAGE 审中-公开
公开(公告)号：US20170103551A1
公开(公告)日：2017-04-13
申请号：US15246433
申请日：2016-08-24
申请人： SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
发明人： Zhipeng Sun , Shaolian Liu , Dong Han , Ming Li , Ruibing Ma
IPC分类号： G06T11/00 , G06T7/00 , G06T3/40 , G01T1/29
CPC分类号： G06T11/006 , A61B6/037 , A61B6/5205 , A61B6/5241 , G01T1/2985 , G06T3/4038 , G06T11/005 , G06T11/008 , G06T2200/32 , G06T2207/10104 , G06T2207/20221 , G06T2210/41 , G06T2211/424
摘要： A method for reconstructing a PET multi-bed image is provided, which may be applied to a PET scan having an axial overlapping region existed between every two adjacent beds. According to an example of the method, a combined set of PET projection data for at least two beds may be obtained by combining a set of PET projection data for at least two successive beds together in such a manner that two sets of PET projection data corresponding to an axial overlapping region between every two adjacent beds are added up. And then, a PET image for at least two beds may be reconstructed based on an image reconstruction iteration model and the combined set of PET projection data for the plurality of beds.

3. 发明申请

US20170084057A1 DETERMINING PET SCANNING TIME 审中-公开
公开(公告)号：US20170084057A1
公开(公告)日：2017-03-23
申请号：US15246442
申请日：2016-08-24
申请人： SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
发明人： Ming Li , Zhipeng Sun
IPC分类号： G06T11/00 , A61B6/04 , A61B6/00 , A61B6/03
CPC分类号： G06T11/003 , A61B6/032 , A61B6/037 , A61B6/0407 , A61B6/5282 , A61B6/54 , G06T2207/10081 , G06T2207/10104
摘要： A method and apparatus for determining PET scanning time are provided. According to an example of the method, a CT image is divided into multiple single-bed CT images according to bed information of bed positions for a PET scan, wherein the CT image is obtained by performing a CT scan on a subject of the PET scan, and a one-to-one corresponding relation exists between the multiple single-bed CT images and all of the beds. A residual true coincidence count ratio is estimated for each of the beds based on corresponding single-bed CT image of the bed, and then a scanning time proportion for each of the beds may be determined based on each of the residual true coincidence count ratios for the beds.

4. 发明申请

US20170186193A1 RECONSTRUCTING PET IMAGE 审中-公开
公开(公告)号：US20170186193A1
公开(公告)日：2017-06-29
申请号：US15372416
申请日：2016-12-08
申请人： Shenyang Neusoft Medical Systems Co., Ltd.
发明人： Shaolian Liu , Ming Li , Zhipeng Sun
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2210/41
摘要： A PET image reconstruction method and device are provided. According to an example, a first diffusion expression representing a diffusion degree of projection data from a first incident point to a first crystal may be obtained with a first diffusion distribution, a second diffusion distribution, a point source position and position information of the first crystal in a projection direction. A second diffusion expression representing a diffusion degree of projection data from a second incident point to a second crystal may be obtained with the first diffusion distribution, the second diffusion distribution, the point source position and position information of the second crystal in the projection direction. A diffusion relationship representing a correspondence relationship between the point source position and projection data in the projection direction may be obtained with the first diffusion expression and the second diffusion expression. A PET image may be reconstructed according to the diffusion relationship.

5. 发明授权

US10460480B2 Reconstructing PET image 有权
公开(公告)号：US10460480B2
公开(公告)日：2019-10-29
申请号：US15819334
申请日：2017-11-21
申请人： Shenyang Neusoft Medical Systems Co., Ltd.
发明人： Yue Liu , Zhipeng Sun , Ming Li
IPC分类号： G06T11/00 , A61B6/03 , G06T7/00 , A61B6/00
摘要： Methods, devices, and systems for reconstructing Positron Emission Computed Tomography (PET) images are provided. In one aspect, a method includes: for each of coincidence events including at least one true coincidence event and at least one scattering coincidence event, determining an emission path of the coincidence event according to photon information of the coincidence event, the photon information of the coincidence event including time data, position data, and angle data of each of two photons involved in the coincidence event, determining an annihilation position of the coincidence event according to the emission path of the coincidence event and the time data of each of the two photons involved in the coincidence event, and reconstructing a PET image according to the annihilation position, the emission path and the photon information of each of the coincidence events.

6. 发明授权

US10157482B2 Reconstructing pet image 有权
公开(公告)号：US10157482B2
公开(公告)日：2018-12-18
申请号：US15372416
申请日：2016-12-08
申请人： Shenyang Neusoft Medical Systems Co., Ltd.
发明人： Shaolian Liu , Ming Li , Zhipeng Sun
IPC分类号： G06T11/00
摘要： A PET image reconstruction method and device are provided. According to an example, a first diffusion expression representing a diffusion degree of projection data from a first incident point to a first crystal may be obtained with a first diffusion distribution, a second diffusion distribution, a point source position and position information of the first crystal in a projection direction. A second diffusion expression representing a diffusion degree of projection data from a second incident point to a second crystal may be obtained with the first diffusion distribution, the second diffusion distribution, the point source position and position information of the second crystal in the projection direction. A diffusion relationship representing a correspondence relationship between the point source position and projection data in the projection direction may be obtained with the first diffusion expression and the second diffusion expression. A PET image may be reconstructed according to the diffusion relationship.

7. 发明授权

US10147206B2 Determining PET scanning time 有权
公开(公告)号：US10147206B2
公开(公告)日：2018-12-04
申请号：US15246442
申请日：2016-08-24
申请人： SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
发明人： Ming Li , Zhipeng Sun
IPC分类号： G06K9/00 , G06T11/00 , A61B6/03 , A61B6/00 , A61B6/04
摘要： A method and apparatus for determining PET scanning time are provided. According to an example of the method, a CT image is divided into multiple single-bed CT images according to bed information of bed positions for a PET scan, wherein the CT image is obtained by performing a CT scan on a subject of the PET scan, and a one-to-one corresponding relation exists between the multiple single-bed CT images and all of the beds. A residual true coincidence count ratio is estimated for each of the beds based on corresponding single-bed CT image of the bed, and then a scanning time proportion for each of the beds may be determined based on each of the residual true coincidence count ratios for the beds.

8. 发明授权

US10410379B2 Reconstructing an image 有权
公开(公告)号：US10410379B2
公开(公告)日：2019-09-10
申请号：US15612895
申请日：2017-06-02
申请人： SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
发明人： Zhipeng Sun , Peng Gao , Shaolian Liu , Ming Li
IPC分类号： G06T11/00
摘要： A method of reconstructing an image that may include in at least one example: determining coincidence events based on detection by a detector during a continuous incremental scanning; determining an axial position for each of the coincidence events; storing data for each of the coincidence events including the axial position in a list mode; sorting the data for each of the coincidence events according to a spatial order; and obtaining an image by performing iterative reconstruction with the sorted data for each of the coincidence events.

9. 发明授权

US10360699B2 Correcting count loss 有权
公开(公告)号：US10360699B2
公开(公告)日：2019-07-23
申请号：US15793914
申请日：2017-10-25
申请人： Shenyang Neusoft Medical Systems Co., Ltd.
发明人： Shaolian Liu , Jie Chang , Ming Li
IPC分类号： G06K9/00 , G06T11/00 , A61B6/03
摘要： Methods for correcting a count loss and PET systems are provided according to examples of the present disclosure. In one aspect, the PET system obtain scanning data of a subject to be detected for which random correction has been performed, obtain a first correction factor corresponding to the true coincidence count according to the single-photon count rates of the two Blocks corresponding to the true coincidence count, obtain a second correction factor corresponding to the true coincidence count according to the system single-photon count rate, and correct the true coincidence count according to the first correction factor and the second correction factor corresponding to the true coincidence count.

10. 发明授权

US10043295B2 Reconstruction and combination of pet multi-bed image 有权
公开(公告)号：US10043295B2
公开(公告)日：2018-08-07
申请号：US15246433
申请日：2016-08-24
申请人： SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
发明人： Zhipeng Sun , Shaolian Liu , Dong Han , Ming Li , Ruibing Ma
IPC分类号： G06K9/00 , G06T11/00 , G01T1/29 , G06T3/40 , A61B6/03 , A61B6/00
摘要： A method for reconstructing a PET multi-bed image is provided, which may be applied to a PET scan having an axial overlapping region existed between every two adjacent beds. According to an example of the method, a combined set of PET projection data for at least two beds may be obtained by combining a set of PET projection data for at least two successive beds together in such a manner that two sets of PET projection data corresponding to an axial overlapping region between every two adjacent beds are added up. And then, a PET image for at least two beds may be reconstructed based on an image reconstruction iteration model and the combined set of PET projection data for the plurality of beds.

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