公开(公告)号：US08094774B2

公开(公告)日：2012-01-10

申请号：US12256855

申请日：2008-10-23

申请人： Yasuhiro Noshi ,  Satoru Nakanishi ,  Satoshi Saito

发明人： Yasuhiro Noshi ,  Satoru Nakanishi ,  Satoshi Saito

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  A61B6/027 ,  G06T11/006 ,  G06T2211/421

摘要： A control unit performs helical scanning an subject while moving a top along a direction substantially parallel to a body axis. An acquisition unit acquires projection data via an X-ray detector. A projection data extraction unit extracts a projection data set necessary for the reconstruction of image data associated with a predetermined slice position from the projection data. A weighting unit assigns a smaller weight to first projection data of the extracted projection data than a weight assigned to second projection data, the first projection data being acquired outside a predetermined period including a predetermined acquisition time of the projection data at the predetermined slice position, the second projection data being acquired within the predetermined period. A reconstruction processing unit reconstructs image data on the basis of the first projection data and the second projection data to which the weights are assigned.

摘要翻译： 控制单元沿着基本上平行于体轴的方向移动顶部，执行对象的螺旋扫描。 获取单元通过X射线检测器获取投影数据。 投影数据提取单元从投影数据中提取与预定切片位置相关联的图像数据的重建所需的投影数据集。 加权单元将分配给所提取的投影数据的第一投影数据的权重分配给比分配给第二投影数据的权重更小的权重，所述第一投影数据在包含预定切片位置处的投影数据的预定获取时间的预定周期之外获取， 所述第二投影数据在所述预定时段内获取。 重建处理单元基于第一投影数据和分配权重的第二投影数据来重构图像数据。

公开(公告)号：US20060274877A1

公开(公告)日：2006-12-07

申请号：US11447117

申请日：2006-06-06

申请人： Yasuhiro Noshi ,  Satoru Nakanishi

发明人： Yasuhiro Noshi ,  Satoru Nakanishi

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： A61B6/032 ,  A61B6/00 ,  A61B6/465 ,  A61B6/469 ,  A61B6/583

摘要： Noise originating from the difference between a second dose as an X-ray dose used for simulation and a first dose as an X-ray dose associated with raw data obtained by past imaging operation is calculated. Simulation pure raw data as information associated with a photon count and noise which are predicted to be detected by a plurality of X-ray detection elements when imaging is performed by using X-rays of the second dose is generated on the basis of the calculated noise and the raw data obtained by past imaging operation. A simulation image predicted to be obtained by imaging operation using X-rays of the second dose is generated by using the simulation pure raw data and displayed.

摘要翻译： 计算来自作为用于模拟的X射线剂量的第二剂量与作为与通过过去成像操作获得的原始数据相关联的X射线剂量的第一剂量之间的差异的噪声。 当根据计算出的噪声产生作为通过使用第二剂量的X射线进行成像时由多个X射线检测元件检测到的光子计数和噪声相关联的信息的模拟纯原始数据 以及通过过去的成像操作获得的原始数据。 通过使用模拟纯原始数据生成预测通过使用第二剂量的X射线的成像操作获得的模拟图像并显示。

公开(公告)号：US08724879B2

公开(公告)日：2014-05-13

申请号：US13520052

申请日：2011-10-25

申请人： Yoshinori Uebayashi ,  Satoru Nakanishi ,  Yasuhiro Noshi

发明人： Yoshinori Uebayashi ,  Satoru Nakanishi ,  Yasuhiro Noshi

IPC分类号： G06K9/00

CPC分类号： A61B6/5258 ,  A61B8/5215 ,  A61B8/5269 ,  G06F19/00 ,  G06T5/002 ,  G06T5/40 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/20224

摘要： A medical image processing apparatus includes a difference calculator, a removal part, a first statistical processing part, and an estimation part. The difference calculator receives a plurality of medical image data with different imaging positions and obtains the difference between the plurality of medical image data, thereby generating difference image data that represents the difference. The removal part removes the region corresponding to a structure from the difference image data. The first statistical processing part obtains the first standard deviation of pixel values of each pixel of the difference image data with the region corresponding to the structure removed. The estimation part estimates the second standard deviation of the medical image data based on the first standard deviation. The medical image processing apparatus can estimate noise level of medical image data.

摘要翻译： 医疗图像处理装置包括差分计算器，去除部分，第一统计处理部分和估计部分。 差分计算器接收具有不同成像位置的多个医学图像数据，并获得多个医学图像数据之间的差异，从而生成表示差异的差异图像数据。 去除部分从差分图像数据中去除与结构对应的区域。 第一统计处理部分获得差分图像数据的每个像素的像素值与去除结构的区域的第一标准偏差。 估计部分基于第一标准偏差来估计医学图像数据的第二标准偏差。 医疗图像处理装置可以估计医学图像数据的噪声水平。

公开(公告)号：US08290233B2

公开(公告)日：2012-10-16

申请号：US12882876

申请日：2010-09-15

申请人： Yasuhiro Noshi ,  Satoru Nakanishi

发明人： Yasuhiro Noshi ,  Satoru Nakanishi

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/4233 ,  A61B6/466 ,  A61B6/5241

摘要： According to one embodiment, an X-ray computed tomography apparatus includes an X-ray generating unit and an area detector. The reconstruction processing unit reconstructs first and second volume data including an overlap region. The extraction unit extracts first and second slice images from the first and the second volume data respectively. The calculation unit calculates the difference value between a sum of pixel values in the first slice images and the sum of pixel values in the second slice images. The determination unit determines whether the difference value falls within a predetermined range. The combining unit combines the first and second volume data and sets a pixel value in the overlap region to a pixel value of the first volume data, a pixel value of the second volume data, or a value derived from pixel values of the first and second volume data.

摘要翻译： 根据一个实施例，X射线计算机断层摄影装置包括X射线产生单元和区域检测器。 重构处理单元重建包括重叠区域的第一和第二体数据。 提取单元分别从第一和第二卷数据提取第一和第二切片图像。 计算单元计算第一切片图像中的像素值之和与第二切片图像中的像素值之和的差值。 确定单元确定差值是否在预定范围内。 组合单元组合第一和第二体积数据，并将重叠区域中的像素值设置为第一体积数据的像素值，第二体积数据的像素值或从第一和第二体积数据的像素值导出的值 卷数据。

公开(公告)号：US08755585B2

公开(公告)日：2014-06-17

申请号：US13107368

申请日：2011-05-13

申请人： Satoru Nakanishi ,  Yasuhiro Noshi

发明人： Satoru Nakanishi ,  Yasuhiro Noshi

IPC分类号： G06K9/00

CPC分类号： A61B6/5258 ,  A61B6/032 ,  A61B6/583 ,  G06T11/006

摘要： According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, an X-ray detector, and a rotating unit. The first reconstruction processing reconstructs a clinical image based on projection data detected by the X-ray detector. The second reconstruction processing reconstructs a noise image based on noise data. The clinical image is combined with the noise image.

摘要翻译： 根据一个实施例，X射线计算机断层摄影装置包括X射线管，X射线检测器和旋转单元。 第一重建处理基于由X射线检测器检测到的投影数据重建临床图像。 第二重建处理基于噪声数据重建噪声图像。 临床图像与噪声图像相结合。

公开(公告)号：US20120288178A1

公开(公告)日：2012-11-15

申请号：US13520052

申请日：2011-10-25

申请人： Yoshinori Uebayashi ,  Satoru Nakanishi ,  Yasuhiro Noshi

发明人： Yoshinori Uebayashi ,  Satoru Nakanishi ,  Yasuhiro Noshi

IPC分类号： G06K9/40

CPC分类号： A61B6/5258 ,  A61B8/5215 ,  A61B8/5269 ,  G06F19/00 ,  G06T5/002 ,  G06T5/40 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/20224

摘要： A medical image processing apparatus includes a difference calculator, a removal part, a first statistical processing part, and an estimation part. The difference calculator receives a plurality of medical image data with different imaging positions and obtains the difference between the plurality of medical image data, thereby generating difference image data that represents the difference. The removal part removes the region corresponding to a structure from the difference image data. The first statistical processing part obtains the first standard deviation of pixel values of each pixel of the difference image data with the region corresponding to the structure removed. The estimation part estimates the second standard deviation of the medical image data based on the first standard deviation. The medical image processing apparatus can estimate noise level of medical image data.

摘要翻译： 医疗图像处理装置包括差分计算器，去除部分，第一统计处理部分和估计部分。 差分计算器接收具有不同成像位置的多个医学图像数据，并获得多个医学图像数据之间的差异，从而生成表示差异的差异图像数据。 去除部分从差分图像数据中去除与结构对应的区域。 第一统计处理部分获得差分图像数据的每个像素的像素值与去除结构的区域的第一标准偏差。 估计部分基于第一标准偏差来估计医学图像数据的第二标准偏差。 医疗图像处理装置可以估计医学图像数据的噪声水平。

公开(公告)号：US07693252B2

公开(公告)日：2010-04-06

申请号：US11447117

申请日：2006-06-06

申请人： Yasuhiro Noshi ,  Satoru Nakanishi

发明人： Yasuhiro Noshi ,  Satoru Nakanishi

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/00 ,  A61B6/465 ,  A61B6/469 ,  A61B6/583

摘要： Noise originating from the difference between a second dose as an X-ray dose used for simulation and a first dose as an X-ray dose associated with raw data obtained by past imaging operation is calculated. Simulation pure raw data as information associated with a photon count and noise which are predicted to be detected by a plurality of X-ray detection elements when imaging is performed by using X-rays of the second dose is generated on the basis of the calculated noise and the raw data obtained by past imaging operation. A simulation image predicted to be obtained by imaging operation using X-rays of the second dose is generated by using the simulation pure raw data and displayed.

摘要翻译： 计算来自作为用于模拟的X射线剂量的第二剂量与作为与通过过去成像操作获得的原始数据相关联的X射线剂量的第一剂量之间的差异的噪声。 当根据计算出的噪声产生作为通过使用第二剂量的X射线进行成像时由多个X射线检测元件检测到的光子计数和噪声相关联的信息的模拟纯原始数据 以及通过过去的成像操作获得的原始数据。 通过使用模拟纯原始数据生成预测通过使用第二剂量的X射线的成像操作获得的模拟图像并显示。

公开(公告)号：US09050002B2

公开(公告)日：2015-06-09

申请号：US12861319

申请日：2010-08-23

申请人： Yasuhiro Noshi ,  Satoshi Saito

发明人： Yasuhiro Noshi ,  Satoshi Saito

IPC分类号： G06K9/00 ,  A61B6/03 ,  G06T11/00 ,  A61B6/00

CPC分类号： A61B6/032 ,  A61B6/503 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/412

摘要： According to one embodiment, an apparatus includes a reconstructing unit, a first control unit, a detecting unit, a generating unit, and a second control unit. The first control unit controls the reconstructing unit to reconstruct first images based on projection data collected in first periods. The detecting unit detects second periods which belong to pulsation cycles different from one another and in which an organ to be imaged is in the substantially same form, based on the first images. The generating unit generates data for reconstruction including projection data for the required angle range by combining projection data collected in third periods close to the second periods. The second control unit controls the reconstructing unit to reconstruct a second image based the data for reconstruction.

摘要翻译： 根据一个实施例，一种装置包括重建单元，第一控制单元，检测单元，生成单元和第二控制单元。 第一控制单元基于在第一周期中收集的投影数据来控制重建单元重构第一图像。 检测单元基于第一图像检测属于彼此不同的脉动周期的第二周期，并且其中要成像的器官基本相同的形式。 生成单元通过组合在接近第二周期的第三周期中收集的投影数据来生成包括所需角度范围的投影数据的重建数据。 第二控制单元基于重建数据控制重建单元重建第二图像。

公开(公告)号：US09239393B2

公开(公告)日：2016-01-19

申请号：US13688531

申请日：2012-11-29

申请人： Manabu Teshigawara ,  Yasuhiro Noshi ,  Takuzo Takayama

发明人： Manabu Teshigawara ,  Yasuhiro Noshi ,  Takuzo Takayama

IPC分类号： G01T1/29 ,  G01T1/164 ,  A61B6/03

CPC分类号： G01T1/2985 ,  A61B6/037 ,  G01T1/1647

摘要： A positron emission computed tomography apparatus according to an embodiment includes a detector, a coincidence counting information generating unit, and a body movement detecting unit. The detector detects annihilation radiation released from a subject. The coincidence counting information generating unit searches for sets of counting information, which counted a pair of annihilation radiations at substantially the same time, from a counting information list that is generated from output signals of the detector; generates a set of coincidence counting information for each retrieved set of counting information; and generates a time series list of coincidence counting information. Based on the time series list of coincidence counting information, the body movement detecting unit detects temporal changes in the body movement of the subject.

摘要翻译： 根据实施例的正电子发射计算机断层摄影装置包括检测器，重合计数信息生成单元和身体运动检测单元。 检测器检测从受试者释放的湮灭辐射。 符合计数信息生成单元从从检测器的输出信号生成的计数信息列表中，搜索基本相同的时间对一对湮灭辐射进行计数的计数信息组; 为每个检索的计数信息集合生成一组重合计数信息; 并生成符合计数信息的时间序列列表。 身体运动检测部基于符合计数信息的时间序列列表来检测被检体的身体动作的时间变化。

公开(公告)号：US08284893B2

公开(公告)日：2012-10-09

申请号：US12560197

申请日：2009-09-15

申请人： Yasuhiro Noshi

发明人： Yasuhiro Noshi

IPC分类号： A61B6/03

CPC分类号： G06T11/005 ,  A61B6/03 ,  A61B6/5282

摘要： An X-ray computer tomography apparatus includes an X-ray tube, an X-ray detector, a rotating mechanism, a reconstruction unit which reconstructs multislice or volume image data based on the projection data detected by the X-ray detector, a profile generating unit which generates a CT value profile in the slice direction for each pixel by using image data, a profile portion extraction unit which extracts a profile portion exceeding a predetermined threshold from each of the CT value profiles, a scattered radiation distribution estimation unit which estimates a scattered radiation distribution centered on the profile portion based on the CT value integral and width of the profile portion, and a scattered radiation correction unit which corrects the image data based on the estimated scattered radiation distribution.

摘要翻译： X射线计算机断层摄影装置包括X射线管，X射线检测器，旋转机构，基于由X射线检测器检测出的投影数据重构多层或体积图像数据的重建单元，生成轮廓图 单位，其通过使用图像数据生成针对每个像素的切片方向的CT值轮廓;轮廓部分提取单元，从每个CT值轮廓提取超过预定阈值的轮廓部分;散射辐射分布估计单元，其估计 基于轮廓部分的CT值积分和宽度的轮廓部分中心的散射辐射分布;以及基于估计的散射辐射分布来校正图像数据的散射辐射校正单元。