公开(公告)号：US4446521A

公开(公告)日：1984-05-01

申请号：US245758

申请日：1981-03-20

申请人： Tamon Inouye

发明人： Tamon Inouye

IPC分类号： G01N23/04 ,  A61B5/055 ,  A61B6/03 ,  A61B8/00 ,  A61B10/00 ,  G01R33/48 ,  G06Q50/22 ,  G06Q50/24 ,  G06T1/00 ,  G06T11/00 ,  G06F15/42 ,  G01N23/00

CPC分类号： G06T11/006 ,  G06T2211/421 ,  Y10S378/901

摘要： An image reconstruction apparatus of the present invention comprises units for measuring projection data from a number of angular directions within an angular range less than 180.degree. with respect to a subject, a unit for performing parallel displacement of the projection data so that the subject may substantially be located within a specific region corresponding to said angular range, a unit for calculating a Fourier coefficient for expanding the displaced that into a Fourier series, and units for reconstructing a slice image of the subject by means of the calculated Fourier coefficient.

摘要翻译： 本发明的图像重建装置包括用于在相对于被摄体小于180度的角度范围内从多个角度方向测量投影数据的单元，用于执行投影数据的平行位移的单元，使得被摄体基本上 位于对应于所述角度范围的特定区域内，用于计算用于扩展其变换为傅立叶级数的位移的傅立叶系数的单元，以及通过所计算的傅里叶系数重建对象的切片图像的单元。

公开(公告)号：US4205375A

公开(公告)日：1980-05-27

申请号：US874065

申请日：1978-01-31

申请人： Tamon Inouye ,  Hiroyuki Mizutani

发明人： Tamon Inouye ,  Hiroyuki Mizutani

IPC分类号： G01N23/04 ,  A61B6/03 ,  G06Q50/22 ,  G06Q50/24 ,  G06T11/00 ,  G01N23/00

CPC分类号： A61B6/032 ,  G06T11/006 ,  G06T2211/421 ,  Y10S378/901

摘要： In a method and an apparatus for performing computed tomography using radiation, the apparatus includes a data selecting unit which divides into a plurality of groups and stores the projection data signals provided by a multitude of radiation beams being projected along several different directions through a slice to be imaged in a subject and penetrating the slice from the external circumference of it with each of the groups corresponding to the beams penetrating along selected directions within a specific scan sector less than 180.degree.; a Fourier transform unit for calculating sample values for the one-dimensional Fourier transform of a projection function formed by each group of said projection data signals; a function calculating unit for calculating sample values for the one-dimensional Fourier transforms as mentioned above for a plurality of projecting directions selected outside said specific scan sector; and a reconstruction unit for calculating the absorption coefficient distribution of the radiation beams in said slice from both said sets of sample values, and a display unit.

摘要翻译： 在用于使用辐射进行计算机断层摄影的方法和装置中，该装置包括数据选择单元，该数据选择单元被划分成多个组，并存储由多个辐射束提供的投影数据信号，该多个辐射束通过一个切片投影到多个不同的方向 在对象中成像并从其外圆周穿透切片，其中每个组对应于在特定扫描扇区内小于180度的选定方向穿透的光束; 傅里叶变换单元，用于计算由每组所述投影数据信号形成的投影函数的一维傅立叶变换的样本值; 功能计算单元，用于针对在所述特定扫描扇区外部选择的多个投影方向，如上所述计算用于一维付里叶变换的采样值; 以及重建单元，用于从两个所述采样值集合计算所述切片中的辐射束的吸收系数分布，以及显示单元。

公开(公告)号：US4189775A

公开(公告)日：1980-02-19

申请号：US874064

申请日：1978-01-31

申请人： Tamon Inouye ,  Hiroyuki Mizutani ,  Toshio Uehara

发明人： Tamon Inouye ,  Hiroyuki Mizutani ,  Toshio Uehara

IPC分类号： A61B6/03 ,  G06T11/00 ,  G01T1/16

CPC分类号： A61B6/032 ,  G06T11/006 ,  G06T2211/421 ,  Y10S378/901

摘要： An apparatus and method for tomographic analysis comprising a detecting system for detecting a number of radiation beams having penetrated a sectional area of a subject and producing projection data signals; a CPU and a memory for applying a filter function to the projection data signals by a convolution integration or by a computational technique included in a filtered-back projection, thereby calculating modified projection data signals, and conducting back projection operations only with respect to points in a partial region or subsection of the sectional portion area by means of the modified projection data, thereby calculating the radiation beam absorption coefficients at said points, the integral operation used in the calculation of the modified projection data signals being limited to an interval in which the quality of an image of said partial region or subsection to be displayed can exclusively be improved by the filter function; and a display unit for displaying the image of the partial region on the basis of said absorption coefficients.

摘要翻译： 一种用于断层分析的装置和方法，包括：检测系统，用于检测穿透被检体的横截面积的多个辐射束，并产生投影数据信号; CPU和存储器，用于通过卷积积分或通过包括在滤波反射投影中的计算技术对投影数据信号应用滤波器功能，由此计算修改的投影数据信号，并且仅针对 通过修改的投影数据来计算截面部分区域的部分区域或子部分，从而计算所述点处的辐射束吸收系数，在修改的投影数据信号的计算中使用的积分操作被限制在 所述部分区域或要显示的子部分的图像的质量可以通过滤波器功能专门地改进; 以及显示单元，用于基于所述吸收系数显示部分区域的图像。

公开(公告)号：US4282438A

公开(公告)日：1981-08-04

申请号：US877730

申请日：1978-02-14

申请人： Susumu Nishida ,  Tamon Inouye ,  Tadatoki Yoshida ,  Kiyoto Saito

发明人： Susumu Nishida ,  Tamon Inouye ,  Tadatoki Yoshida ,  Kiyoto Saito

IPC分类号： G01N23/04 ,  A61B6/03 ,  G06T1/00 ,  G06T11/00 ,  G01N21/00

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

摘要： A computerized tomography system and method using penetrating radiation having a radiation source for radiating penetrating radiation into the interior of a thin sliced layer portion of a subject, in a manner that it expands substantially in a fanned fashion, a detector for substantially dividing the radiation after passing through said sliced layer portion into a plurality of radiation beams diverging at a defined angle, thereby detecting the intensity of said beams, a moving unit for substantially linearly scanning each of said beams at least once in a direction transverse of said sliced layer portion, a data processing unit for reconstructing an image of said sliced layer portion on the basis of detected data delivered from said detector, and a display unit for displaying said image on the basis of the results of said reconstruction.

摘要翻译： 一种使用穿透辐射的计算机断层摄影系统和方法，所述穿透辐射具有辐射源，用于以基本上以扇形方式展开的方式将穿透辐射辐射到被摄体的薄片层部分的内部， 通过所述切片层部分，以限定角度发散的多个辐射束，从而检测所述光束的强度;移动单元，用于沿横向于所述切片层部分的方向基本上线性扫描所述光束至少一次， 数据处理单元，用于基于从所述检测器发送的检测数据重建所述限幅层部分的图像;以及显示单元，用于基于所述重建的结果显示所述图像。

公开(公告)号：US4620154A

公开(公告)日：1986-10-28

申请号：US622267

申请日：1984-06-19

申请人： Tamon Inouye

发明人： Tamon Inouye

IPC分类号： G01R33/20 ,  A61B5/055 ,  A61B10/00 ,  G01R33/48 ,  G01R33/50 ,  G01R33/54 ,  G01R33/22

CPC分类号： G01R33/482 ,  G01R33/50

摘要： A image is constructed from nuclear magnetic resonance image data which represent a characteristic of an object. Data are collected using the saturation-recovery method and the inversion-recovery method; a first and second image are produced from data from each method, respectively; and a third image is produced from the first and second image, depending only on a single relaxation time.

摘要翻译： 由表示物体的特征的核磁共振图像数据构成图像。 采用饱和回收方法和反演回收方法收集数据; 分别从每种方法的数据产生第一和第二图像; 并且仅根据单个松弛时间从第一和第二图像产生第三图像。