-
公开(公告)号：US07583992B2
公开(公告)日：2009-09-01
申请号：US10485433
申请日：2001-03-16
IPC分类号： A61B5/05
CPC分类号： G01R33/563 , G01R33/281
摘要： A magnetic resonance angiogram (MRA) is acquired using a contrast enhancement method in which a series of NMR images are rapidly acquired during a time resolved phase of the examination in which the contrast bolus makes a first pass through the arteries and veins. Arterial and venous voxels are automatically identified in the images using either of two disclosed methods. The signals from identified arterial voxels are used to produce an arterial contrast enhancement reference curve that is used to segment arterial voxels by a correlation process. Venous voxels are segmented in the same manner using a calculated venous contrast enhancement reference curve.
摘要翻译： 使用对比度增强方法获得磁共振血管造影（MRA），其中在检查的时间分辨阶段期间快速获取一系列NMR图像，其中对比剂推注首先通过动脉和静脉。 使用两种公开的方法之一，在图像中自动识别动脉和静脉体素。 来自确定的动脉体素的信号用于产生用于通过相关过程分割动脉体素的动脉造影增强参考曲线。 使用计算的静脉造影增强参考曲线以相同的方式分割静脉体素。
-
公开(公告)号：US06381486B1
公开(公告)日：2002-04-30
申请号：US09314227
申请日：1999-05-18
IPC分类号： A61B505
CPC分类号： G01R33/5635 , G01R33/5619
摘要： A magnetic resonance angiogram (MRA) is acquired using a contrast enhancement method in which a series of low resolution NMR images are rapidly acquired during a time resolved phase of the examination in which the contrast bolus makes a first pass through the arteries and veins. Additional, high resolution NMR image data is acquired in a subsequent steady-state phase of the examination from which a high resolution NMR image is reconstructed. Segmentation of arteries, veins and background in the high resolution image is performed using information in the low resolution NMR images.
摘要翻译： 使用对比度增强方法获得磁共振血管造影（MRA），其中在检查的时间分辨阶段期间快速获取一系列低分辨NMR图像，其中对比剂推注首先通过动脉和静脉。 另外，高分辨率NMR图像数据在随后的重建的高分辨率NMR图像的检查的稳态阶段获得。 使用低分辨率NMR图像中的信息来执行高分辨率图像中的动脉，静脉和背景的分割。
-
搜索结果
2 条记录 (耗时 0.009 秒)