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Personal computer aided mapping and measurement of cerebral perfusion with dynamic CT
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 1
- DOI:
- 10.3760/j.issn:1005-1201.2002.01.002
- Key Word:
- 体层摄影术,X线计算机;脑;局部血流;诊断,计算机辅助
Abstract： 目的报告微机辅助CT脑灌注成像以及定量测量方法.方法以Pentium Ⅱ 300 MHz微处理器、128 MB内存、16 MB显存、6 G硬盘PC机和Windows 98第2版为平台,用Vissual C++为开发语言,根据中心容积定理,利用动态CT图像分析并计算脑血流动力学的有关参数,包括脑血流量(cerebral blood flow, CBF)、脑血容量(cerebral blood volume, CBV)、平均通过时间(mean transit time, MTT)和峰值时间(time to peak, TTP)等.最后,将脑血流动力学数据根据色阶分别处理成脑血流量图(mapping of CBF)、脑血容量图(mapping of CBV)、平均通过时间图(mapping of MTT)和峰值时间图(mapping of TTP).结果动态增强CT图像经软件处理后可以在微机上显示脑组织的CBF、CBV、TTP和MTT灌注原始图像以及分割颅骨、皮下组织和脑室后的图像.急性脑缺血患者在MR T1加权像、T2加权像、平扫CT以及增强CT未显示的责任病灶, 脑CT灌注图像可以清楚显示脑血流动力学的异常.结论微机辅助CT脑灌注成像简单易行,可显示常规CT和MR无法发现的早期脑缺血区的血流异常.与MR灌注成像相比更适用于急诊检查.
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