...原理和中心容积定律;它是在静脉注射造影剂的同时对选定的层面进行多次连续扫描,以获得相应层面内每一象素的时间-密度曲线(TDC),然后依据该曲线利用不同的数学模型计算出rCBV、rCBF、MTT、Ps等多种脑血流灌注参数来评价组织器官的灌注状态。
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肺癌线诊断技术[医学影像管理网] 增强和多层动态增强,是近年国内外研究的热点,今年swensen等[5]有了一份总结性的报告。 时间-密度曲线(time-density curve, tdc)――能够更准确地反映结节血供特点(强化特征):快速团注造影剂后,对结节最大层面进行连续同层面动态扫描
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③肺癌的时间-密度曲线(time attenuation curve, TAC)多呈“慢升慢降”型;炎性结节多呈“快升慢降”或“快升快降”型;结核球多呈低平曲线。
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的时间密度曲线 time-density curve ; TDC
时间密度曲线 Time Density Curve ; time attenuation curve ; T-DC
的时间-密度曲线 time-density curve ; time attenuation curve
组织的时间密度曲线 time density curves ; TDC
时间―密度曲线 time-density curve ; TDC
时间.密度曲线 time-density curve ; TDC
一像素的时间密度曲线 time-density curve ; TDC
素的时间密度曲线 timedensity curve ; TDC
病灶时间密度曲线 Time attenuation curve ; TAC
对实验组支架植入前后造影结果进行分析,拟合动脉瘤内时间-密度曲线。
The results of angiography before and after the stent implantation were compared and analyzed in experimental group, and then a time-density curve inside the aneurysm was fitted.
依据时间-密度曲线,确诊血管性病变如动脉瘤、血管瘤或血管畸形,并将它们与颅内肿瘤鉴别。
Vascular disorders such as aneurysm, angioma or arteriovenous malformation can be detected and differentiated from intracranial tumors or granuloma based on typical time-density curves;
方法:9例志愿者行主动脉弓同层动态增强扫描,利用获得的主动脉弓时间-密度曲线(TDC),寻求触发技术的理论阈值。
Methods:Dynamic CT scan was performed in 9 volunteers, measuring the CT value of the same plane of aortic arch and the theoretical threshold was obtained by the time density curve(TDC).
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