公开(公告)号：US5457321A

公开(公告)日：1995-10-10

申请号：US237421

申请日：1994-05-03

申请人： Takashi Ichihara ,  Akiyoshi Kinda

发明人： Takashi Ichihara ,  Akiyoshi Kinda

IPC分类号： G01T1/164 ,  G01T1/166

CPC分类号： G01T1/1648 ,  G01T1/1642 ,  A61B6/037 ,  Y10S378/901

摘要： A SPECT apparatus for forming a radioisotope distribution topographic image of an object, in which a detector such as a fan beam collomator detects fan beam shaped gamma ray emitted from a radioisotope given to the object to provide fan beam data, while a scanner causes relative rotation between the object and the detecter, and a data collector collects the fan beam data, and in which a data converter successively converts the fan beam data into parallel beam data during the relative rotation, and a reconstructor reconstructs a tomographic image from the parallel beam data. The fan beam data having a first matrix size and a first angle may be converted into the parallel beam data having a second matrix size and a second angle which are different from the first matrix size and the first angle, respectively.

摘要翻译： 一种用于形成物体的放射性同位素分布地形图像的SPECT装置，其中诸如风扇光束胶体仪的检测器检测从给予对象的放射性同位素发射的扇形束形伽马射线，以提供风扇光束数据，同时扫描器引起相对旋转 在物体和检测器之间，并且数据收集器收集风扇光束数据，并且其中数据转换器在相对旋转期间将风扇光束数据连续地转换为并行光束数据，并且重构器从平行光束数据重建断层图像 。 具有第一矩阵尺寸和第一角度的风扇光束数据可以被转换成具有分别与第一矩阵尺寸和第一角度不同的第二矩阵尺寸和第二角度的平行光束数据。

公开(公告)号：US20100158336A1

公开(公告)日：2010-06-24

申请号：US12635045

申请日：2009-12-10

申请人： Nobutoku MOTOMURA ,  Akiyoshi Kinda

发明人： Nobutoku MOTOMURA ,  Akiyoshi Kinda

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/583 ,  G01T1/00 ,  G06T11/005

摘要： A detector detects gamma-rays emitted from inside an imaging region. An acquisition unit acquires a plurality of first projection data sets associated with a plurality of projection angles via the detector. An attenuation-correction unit attenuation-correct the plurality of first projection data sets based on a first CT image associated with the imaging region to generate a plurality of second projection data sets associated with the plurality of projection angles. An index calculation unit calculates an index based on the plurality of second projection data sets. The index is corresponding to a degree of positional offset between the imaging region at the time of acquisition of a plurality of third projection data sets associated with the first CT image and the imaging region at the time of acquisition of the plurality of first projection data sets.

摘要翻译： 检测器检测从成像区域内发射的伽马射线。 采集单元通过检测器获取与多个投影角度相关联的多个第一投影数据集。 衰减校正单元基于与成像区域相关联的第一CT图像衰减校正多个第一投影数据集，以生成与多个投影角度相关联的多个第二投影数据集。 索引计算单元基于多个第二投影数据集计算索引。 该索引对应于在获取多个第一投影数据集时获取与第一CT图像相关联的多个第三投影数据集和成像区域之间的成像区域之间的位置偏移程度 。