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    • 2. 发明公开
    • 고해상도 양전자 방출 단층 촬영에서 병렬 처리를 위해 영상을 재구성하는 방법 및 장치
    • 用于重组图像以平行处理高分辨率排放平面图的方法和装置
    • KR1020130111706A
    • 2013-10-11
    • KR1020120033774
    • 2012-04-02
    • 한국과학기술원
    • 나종범안일준정계영남우현김지혜
    • G01N23/04A61B6/03
    • G01N23/083A61B6/037G06T11/008
    • 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
    • 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
    • 5. 发明公开
    • 양전자 단층촬영에서 영상의 해상도를 향상시키는 해상도 향상 장치 및 방법
    • 改善图像分辨率在POSITRON排放图像中的装置和方法
    • KR1020110121535A
    • 2011-11-07
    • KR1020110020495
    • 2011-03-08
    • 한국과학기술원
    • 나종범정계영남우현김지혜
    • A61B5/055G06T19/20
    • 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.
    • 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。
    • 6. 发明公开
    • 엑스선 촬영 영상에서 메탈 아티팩트를 감소시키는 방법
    • 从X射线图像减少金属艺术的方法
    • KR1020100045277A
    • 2010-05-03
    • KR1020080104387
    • 2008-10-23
    • (주)바텍이우홀딩스한국과학기술원
    • 나종범정계영
    • A61B6/00
    • A61B6/5258
    • 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).
    • 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)。
    • 7. 发明公开
    • 엑스선 영상 장치 및 그 제어 방법
    • X射线成像装置及其控制方法
    • KR1020150145690A
    • 2015-12-30
    • KR1020150040015
    • 2015-03-23
    • 삼성전자주식회사한국과학기술원
    • 정계영이재학성영훈예종철이민지한요섭
    • A61B6/00G06T5/00
    • 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.
    • 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。
    • 9. 发明公开
    • 양전자 단층 촬영 영상에서 워블 동작과 PSF을 이용한 초해상도 촬영 장치 및 방법
    • 用于运动和PSF的超分辨率方法和装置在位置发射测量
    • KR1020110121536A
    • 2011-11-07
    • KR1020110020506
    • 2011-03-08
    • 한국과학기술원
    • 나종범정계영남우현김지혜
    • A61B5/055G06T19/20
    • 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.
    • 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。
    • 10. 发明授权
    • MR 영상을 이용한 PET 영상 감쇄 보상 방법 및 PET 장치
    • 使用磁共振图像校正PET图像的衰减的POSITRON排放测量和方法
    • KR101080605B1
    • 2011-11-04
    • KR1020100040914
    • 2010-04-30
    • 한국과학기술원
    • 나종범남우현정계영이덕운김지혜
    • A61B5/055G06T17/00
    • 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).
    • 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。