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公开(公告)号：KR1020150058858A
公开(公告)日：2015-05-29
申请号：KR1020130142140
申请日：2013-11-21
CPC classification number: A61B6/5217 , A61B6/032 , A61B6/037 , A61B6/5205 , G06T11/006 , G06T2211/421
Abstract: 영상복원방법, 영상복원유닛및 방사선영상장치에관련된것으로, 영상복원방법은, 피사체내부의촬영영역에대한투영영상을획득하는투영영상획득단계, 상기투영영상에대해미분및 역투영방법을이용하여 DBP 결과값을연산하는미분및 역투영단계, 상기 DBP 결과값을이용하여상기피사체내부의촬영영역에대한영상을복원하되, 상기피사체내부의촬영영역에대해정규함수를적용하여상기촬영영역에대한영상을복원하는영상복원단계를포함할수 있다.
Abstract translation: 本发明涉及重建图像的方法，图像重建单元和放射摄影装置。 该方法可以包括：投影图像获取步骤，用于获得受试者中记录区域的受保护图像; 差分和反向投影步骤，通过差分和反向投影方法计算相对于投影图像的DBP结果值; 以及图像重建步骤，通过对对象中的记录区域应用正常功能，通过DBP结果值来重建被摄体中的记录区域。
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公开(公告)号：KR1020130111706A
公开(公告)日：2013-10-11
申请号：KR1020120033774
申请日：2012-04-02
Applicant: 한국과학기술원
CPC classification number: G01N23/083 , A61B6/037 , G06T11/008
Abstract: PURPOSE: A method and an apparatus for reconstructing an image for performing the parallel-treatment in the high definition positron emission tomography are provided to convert the sinogram format so that the sinogram format is suitable to the parallel-treatment in a forward projection and a back projection during the image reconstruction based on ordered subset expectation maximization (OSEM), thereby facilitating the computing optimized to the parallel-treatment. CONSTITUTION: A method for reconstructing an image for performing the parallel-treatment is as follows. The line-of-response which is detected from a detector is converted into a sinogram format which has a cone beam shape by responding to the radiation with which a measurement target body is irradiated (810). The back projection is performed based on the converted lines-of-response (830). The image is reconstructed by using the performance result of the back projection (850). [Reference numerals] (810) Convert the line-of-response (LOR) into a sinogram format with the shape of a cone beam; (830) Perform back projection; (850) Reconstruct the image; (AA) Start; (BB) End
Abstract translation: 目的：提供一种用于重建用于在高分辨正电子发射断层摄影中进行并行处理的图像的方法和装置，以转换正弦图格式，使得正弦图格式适合于前向投影和背面中的并行处理 在基于有序子集期望最大化（OSEM）的图像重建期间的投影，从而促进针对并行处理优化的计算。 构成：用于重建用于执行并行处理的图像的方法如下。 （810）将从检测器检测出的响应线转换为具有锥形束形状的正弦图格式（810）。 基于经转换的响应行执行背投影（830）。 通过使用反投影的性能结果（850）重建图像。 （附图标记）（810）将响应响应（LOR）转换成具有锥形束形状的正弦图形格式; （830）执行反投影; （850）重构图像; （AA）开始; （BB）结束
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公开(公告)号：KR101018051B1
公开(公告)日：2011-03-02
申请号：KR1020080104387
申请日：2008-10-23
Applicant: (주)바텍이우홀딩스 , 한국과학기술원
IPC: A61B6/00
CPC classification number: A61B6/5258
Abstract: 본 발명은 엑스선 촬영 장치로 촬영한 엑스선 촬영 영상, 특히 치과용 엑스선 촬영 장치로 촬영한 엑스선 촬영 영상에서 발생되는 메탈 아티팩트(metal artifact)를 감소시키는 방법을 제시하는 엑스선 촬영 영상에서 메탈 아티팩트를 감소시키는 방법에 관한 것이다.
엑스선 촬영 장치, 메탈 아티팩트, 프로젝션, FBP-
公开(公告)号：KR101268246B1
公开(公告)日：2013-06-04
申请号：KR1020110020506
申请日：2011-03-08
Applicant: 한국과학기술원
Abstract: PET(Positron Emission Tomography) 검출기 전체 또는 침대의 움직임을 통하여 인가된 입력 신호를 PET(Positron Emission Tomography)의 위치에 따라 분류된 입력 신호를 재구성하여 제1 영상 세트를 생성하고, 상기 제1 영상 세트에 따른 PSF(point spread function)를 기반으로 초해상도(Super-resolution) 알고리즘을 적용하여 제2 영상 정보를 생성하는 영상 생성 장치를 제공한다.
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公开(公告)号：KR1020110121535A
公开(公告)日：2011-11-07
申请号：KR1020110020495
申请日：2011-03-08
Applicant: 한국과학기술원
Abstract: PURPOSE: A device and method for improving resolution in a positron emission tomography are provided to implement an image with high resolution by converting a sinogram extracted from radiation into the sinogram with high resolution. CONSTITUTION: A reactive line detector(301) detects a reactive line in response to radiation irradiated to an object. A sinogram extractor(302) extracts a sinogram from the detected reactive line. A high resolution converter(303) converts the extracted sinogram to a sinogram with high resolution. An image re-composition processor(304) re-composes the image of high resolution from the sinogram with high resolution. The image re-composition processor uses OSEM(Ordered-subset expectation maximization) algorithm.
Abstract translation: 目的：提供一种用于提高正电子发射断层摄影术中分辨率的装置和方法，以通过将从辐射提取的正弦图转换成具有高分辨率的正弦图来实现具有高分辨率的图像。 构成：反应线检测器（301）响应于照射到物体的辐射而检测反应线。 正弦图提取器（302）从检测到的反应线提取正弦图。 高分辨率转换器（303）将提取的正弦图转换成具有高分辨率的正弦图。 图像重构处理器（304）以高分辨率从正弦图重新构成高分辨率的图像。 图像重组处理器使用OSEM（有序子集期望最大化）算法。
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Patent Agency Ranking
公开(公告)号：KR1020100045277A
公开(公告)日：2010-05-03
申请号：KR1020080104387
申请日：2008-10-23
Applicant: (주)바텍이우홀딩스 , 한국과학기술원
IPC: A61B6/00
CPC classification number: A61B6/5258
Abstract: PURPOSE: A method for reducing a metal artifact from an X-ray image is provided to obtain a clear X-ray image by removing the metal artifact due to an artificial prosthetic device or filler from a teeth X-ray image. CONSTITUTION: An initial re-composition image is obtained from X-ray projection data(S100). A metal image is separated from the initial re-composition image(S200). A first correction re-composition image is obtained by interpolating a first missing region(S300). A second correction re-composition image is obtained by a smoothing method(S400). First re-projection data is obtained by re-projecting a second correction re-composition image(S500). Second re-projection data is obtained by interpolating the first re-projection data(S600). A final re-composition image is completed by assembling the finial re-composition image and the metal image(S800).
Abstract translation: 目的：提供从X射线图像减少金属伪像的方法，以从牙齿X射线图像中去除由于人造假体装置或填充物引起的金属伪影，以获得清晰的X射线图像。 构成：从X射线投影数据获得初始重组图像（S100）。 金属图像与初始重新组合图像分离（S200）。 通过内插第一缺失区域获得第一校正重组图像（S300）。 通过平滑方法获得第二校正重组图像（S400）。 通过重新投影第二校正重构图像获得第一重投影数据（S500）。 通过内插第一再投影数据获得第二重投影数据（S600）。 通过组装最终重新组合图像和金属图像来完成最终的重新组合图像（S800）。
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公开(公告)号：KR1020150145690A
公开(公告)日：2015-12-30
申请号：KR1020150040015
申请日：2015-03-23
Abstract: 엑스선영상장치는, 촬영영역(FOV, field of view)의투영영상에대해역투영영상을생성하는역투영영상생성부; 및역투영영상의주파수성분에기초하여주파수별복원영상을생성하고, 주파수별복원영상을합성하여투영영상에대한복원영상을생성하는영상복원부; 를포함할수 있다. 이와같은엑스선영상장치및 엑스선영상장치의제어방법에의하면, 대상체의전부또는일부영역에대해복원영상을생성할수 있다. 특히, 대상체내부의일부분의정보를알 수없는경우또는촬영영역(FOV, field of view)이대상체내부의일부분만을포함하는경우에도복원영상을생성할수 있으며, 이에따라대상체에대한엑스선조사범위를축소하여엑스선의피폭량을감소시킬수 있다. 또한, 영상복원을위한연산량및 연산의복잡도를감소시켜복원영상의생성시간을단축시킬수 있다.
Abstract translation: 一种X射线成像装置，包括：背景投影图像生成部，其生成用于视场（FOV）的投影图像的背投影像; 以及图像恢复部，其基于反投影图像的频率分量，通过频率生成恢复图像，并且通过频率合成恢复图像来生成用于投影图像的恢复图像。 根据X射线摄像装置及其控制方法，生成针对目标对象的全部或部分区域的恢复图像。 特别地，即使目标中的部分信息未知或FOV仅包括目标中的一部分，也可以生成恢复的图像，因此减小目标的X射线辐射范围以减少X射线的辐射量， 射线。 此外，减少用于恢复图像的计算量和计算的复杂度，以减少生成恢复图像的时间。
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8.发明公开
公开(公告)号：KR1020120125793A
公开(公告)日：2012-11-19
申请号：KR1020110043448
申请日：2011-05-09
Applicant: 한국과학기술원
Abstract: PURPOSE: A method and apparatus for processing OSEM in parallel based on GPU are provided to reduce operation time by integrally performing preprocesses for image reconstruction. CONSTITUTION: A preprocessor(110) outputs gamma-ray emission sinogram based on a preprocessing result. A constant table declaring unit(120) declares a constant table including one or more information of a recovery object. An image reconstruction integration estimating unit(130) outputs the final reconstruction image by performing the maximum probability algorithm. [Reference numerals] (100) OSEM parallel processing device; (110) Preprocessor; (120) Constant table declaring unit; (130) Image reconstruction integration estimating unit
Abstract translation: 目的：提供一种用于基于GPU并行处理OSEM的方法和装置，以通过整合执行图像重构的预处理来减少操作时间。 构成：预处理器（110）基于预处理结果输出伽马射线发射正弦图。 常数表声明单元（120）声明包含恢复对象的一个或多个信息的常量表。 图像重建积分估计单元（130）通过执行最大概率算法输出最终重建图像。 （附图标记）（100）OSEM并行处理装置; （110）预处理; （120）常数表声明单位; （130）图像重建积分估计单元
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公开(公告)号：KR1020110121536A
公开(公告)日：2011-11-07
申请号：KR1020110020506
申请日：2011-03-08
Applicant: 한국과학기술원
Abstract: PURPOSE: A super-resolution photographing device and a super-resolution photographing method using a PSF(Point Spread Function) and a wobble motion in a positron emission tomography are provided to implement an image with super-resolution based on the PSF according to the position of a PET(Positron Emission Tomography) image. CONSTITUTION: A signal classifying unit(110) classifies an input signal applied through the movement of a bed according to the position of a PET. A first image generator(120) generates a first image set by re-composing the classified input signal. A first image set is a low resolution image set. A parameter measuring unit(130) measures the PSF according to the first image set. A second image generator(140) generates second image information by applying super-resolution algorithm based on the PSF.
Abstract translation: 目的：提供使用PSF（点扩散函数）和正电子发射断层摄影中的摆动运动的超分辨率拍摄装置和超分辨率拍摄方法，以根据位置实现基于PSF的超分辨率图像 的PET（正电子发射断层扫描）图像。 构成：信号分类单元（110）根据PET的位置对通过床的运动施加的输入信号进行分类。 第一图像生成器（120）通过重新构成分类的输入信号来生成第一图像集。 第一个图像集是低分辨率图像集。 参数测量单元（130）根据第一图像集来测量PSF。 第二图像生成器（140）通过应用基于PSF的超分辨率算法来生成第二图像信息。
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公开(公告)号：KR101080605B1
公开(公告)日：2011-11-04
申请号：KR1020100040914
申请日：2010-04-30
Applicant: 한국과학기술원
Abstract: PURPOSE: A positron emission tomography and a method for correcting attenuation of a pet image using a magnetic resonance image is provided to perform PET attenuation compensation by using a 3D MR image classified into a CT image and a respiration state. CONSTITUTION: In a positron emission tomography and a method for correcting attenuation of a pet image using a magnetic resonance image, an PET device obtains n 3D MR image and n 3D PET image which are classified into the respiration state of a subject(210). The pet device generates an attenuation compensation map of the n 3D MR image through one CT image(220). The PET device compensates n 3D PET image by using generated attenuation compensation map. The PET device generates one PET image by combining n attenuation compensated 3D PET(240).
Abstract translation: 目的：提供正电子发射断层摄影和使用磁共振图像校正宠物图像的衰减的方法，以通过使用分类为CT图像和呼吸状态的3D MR图像来执行PET衰减补偿。 构成：在正电子发射断层摄影和使用磁共振图像校正宠物图像的衰减的方法中，PET装置获得分类为被摄体（210）的呼吸状态的n个3D MR图像和n 3D PET图像。 宠物装置通过一个CT图像（220）生成n个3D MR图像的衰减补偿图。 PET设备通过使用生成的衰减补偿图来补偿n 3D PET图像。 PET装置通过组合n衰减补偿3D PET（240）生成一张PET图像。
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