...
首页> 外文期刊>Radiology >In vivo regional cerebral blood volume: quantitative assessment with 3D T1-weighted pre- and postcontrast MR imaging.
【24h】

In vivo regional cerebral blood volume: quantitative assessment with 3D T1-weighted pre- and postcontrast MR imaging.

机译:体内区域性脑血容量:使用3D T1加权造影前后对比成像进行定量评估。

获取原文
获取原文并翻译 | 示例
           

摘要

PURPOSE: To assess the use of pre-and postcontrast three-dimensional (3D) T1-weighted images to obtain quantitative regional cerebral blood volume (rCBV) maps and to delineate the vascular system of the brain. MATERIALS AND METHODS: Sagittal 3D pre-and postcontrast T1-weighted images were acquired in 10 patients and two volunteers. The images were processed with a knowledge-based segmentation algorithm to obtain independent blood volume maps of gray matter (GM), white matter (WM), and blood vessels and to quantitate rCBV in various cortical and deep cortical structures. Localized maximum intensity projection (MIP)-rCBV images were used to reveal the brain's venous system and vascularity in and around any lesions present. RESULTS: Group-averaged (n = 8) rCBV maps from both GM (4.80% +/- 0.37) and WM (2.02% +/- 0.14) yielded a ratio of GM-to-WM rCBV of 2.38 +/- 0.20. The ratio of rCBV between cortical and deep cortical GM was 1.15. rCBV maps showed better vascular contrast than did the postcontrast images in delineation of blood vessels and in the lesions present in two patients. A localized MIP-rCBV image had more than five times higher vascular contrast-to-noise ratio than that of the postcontrast MIP image. CONCLUSION: rCBV maps can be obtained in a standard clinical setting and can be used to reveal information on local blood volume.
机译:目的:评估使用对比前和对比后的三维(3D)T1加权图像来获得定量的局部脑血容量(rCBV)图并描绘大脑的血管系统。材料与方法:在10位患者和两名志愿者中获得了矢状3D造影前后T1加权图像。使用基于知识的分割算法对图像进行处理,以获得独立的灰质(GM),白质(WM)和血管的血容量图,并定量各种皮层和深层皮层结构中的rCBV。局部最大强度投影(MIP)-rCBV图像用于揭示存在的任何病变内及其周围的大脑静脉系统和血管。结果:来自GM(4.80%+/- 0.37)和WM(2.02%+/- 0.14)的组平均(n = 8)rCBV映射得出的GM与WM rCBV之比为2.38 +/- 0.20。皮质与深层皮质GM之间的rCBV之比为1.15。在两名患者的血管轮廓和病变中,rCBV图显示出比造影后图像更好的血管对比度。本地化的MIP-rCBV图像的血管造影剂噪声比造影后的MIP图像高五倍。结论:rCBV图可在标准临床环境中获得,并可用于揭示有关局部血容量的信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号