公开(公告)号：US06377835B1

公开(公告)日：2002-04-23

申请号：US09651748

申请日：2000-08-30

申请人： Stefan O. Schoenberg ,  Michael Bock ,  Michael V. Knopp ,  Gerhard Laub

发明人： Stefan O. Schoenberg ,  Michael Bock ,  Michael V. Knopp ,  Gerhard Laub

IPC分类号： A61B505

CPC分类号： G01R33/5601 ,  A61B5/055 ,  G06T7/0012

摘要： In a 3D magnetic resonance angiography (MRA) method, a region of interest, containing a major pulmonary vessel, is defined in an examination subject, and the subject is injected with a contrast agent bolus and a number of 3D magnetic resonance angiography data sets are obtained from the examination subject before, during and after arrival of the bolus in the region of interest. A slice from each of the data sets is selected which contains the region of interest, and an average region of interest signal as a function of time is determined and stored as a reference time curve. In the respective selected slices, a signal-time curve is identified and each signal-time curve is cross-correlated with the reference time curve. The cross-correlation results are used to form a new three-dimensional data set containing arterial and venous correlation maps. Maximum intensity projections are computed from the arterial and venous correlation maps for producing a visualized image of the pulmonary vasculature in the region of interest, the arteries and veins in the respective maximum intensity projections being clearly distinguishable.

摘要翻译： 在3D磁共振血管造影（MRA）方法中，在检查对象中定义了包含主要肺血管的感兴趣区域，并且将受试者注射造影剂推注，并且多个3D磁共振血管造影数据集是 在大量药物到达之前，期间和之后从感染区域获得的检查对象。 选择来自每个数据集的切片，其包含感兴趣区域，并且确定作为时间的函数的平均感兴趣区域信号，并将其存储为参考时间曲线。 在各个选定的切片中，识别信号 - 时间曲线，并且每个信号 - 时间曲线与参考时间曲线互相关。 互相关结果用于形成包含动脉和静脉相关图的新的三维数据集。 从动脉和静脉相关图计算最大强度投影，用于产生感兴趣区域中肺血管系统的可视化图像，各个最大强度投影中的动脉和静脉可以清楚地区分开。