公开(公告)号：US07551721B2

公开(公告)日：2009-06-23

申请号：US11676885

申请日：2007-02-20

申请人： Takeshi Nakaura ,  Satoru Ohishi

发明人： Takeshi Nakaura ,  Satoru Ohishi

IPC分类号： A61B6/00

CPC分类号： A61B6/504 ,  A61B5/7289 ,  A61B6/5264 ,  A61B6/541 ,  A61B8/00 ,  A61B8/5276 ,  G06T5/50 ,  G06T7/0016 ,  G06T7/20 ,  G06T2207/10116 ,  G06T2207/20224 ,  G06T2207/30101 ,  H04N5/3205

摘要： An X-ray diagnostic apparatus includes an image generating unit which generates a plurality of X-ray images by repeatedly radiographing a subject before and after injection of a contrast medium, a region detecting unit which detects a non-contrast region from a plurality of mask images before injection of the contrast medium and a plurality of contrast images after injection of the contrast medium, which constitute the plurality of X-ray images, a mask selecting unit which separately selects one mask image with respect to each of the contrast images on the basis of a correlation between the contrast image and the mask image upon localization to the non-contrast region, and a subtraction processing unit which generates a subtraction image by performing subtraction between the contrast image and the selected mask image.

摘要翻译： 一种X射线诊断装置包括：图像生成单元，其通过在注射造影剂之前和之后反复放射对象来生成多个X射线图像;区域检测单元，其从多个掩模检测非对比度区域 在注射造影剂之前的图像和在注入构成多个X射线图像的造影剂之后的多个对比度图像;掩模选择单元，其针对每个对比图像分别选择一个掩模图像 在对比度区域定位时对比度图像和掩模图像之间的相关性的基础;以及减法处理单元，其通过在对比度图像和所选择的掩模图像之间进行减法来生成减法图像。