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双能量CT肺灌注成像评价急性肺栓塞严重程度的可行性研究
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双能量CT肺灌注成像评价急性肺栓塞严重程度的可行性研究
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Journal Article
双能量CT肺灌注成像评价急性肺栓塞严重程度的可行性研究
2011
Overview
目的分析双源CT双能量肺灌注成像（DEPI）技术评价急性肺动脉栓塞（APE）严重程度的可行性。方法经双源CT诊断APE24例,采用Lung PBV软件进行数据处理,得到CT肺血管图像（CTPA）和DEPI,分别计算每位患者的灌注缺损指数、栓塞指数及双室短轴最大径比（RV/LV）,依据患者严重程度分为严重APE组（n=9）和非严重APE组（n=15）,比较两组灌注缺损指数、栓塞指数及RV/LV,并进行Spearman等级相关分析。结果严重APE组的灌注缺损指数、栓塞指数及RV/LV中位数分别为32.5%（15.0%62.5%）、45.0%（27.5%75.0%）和1.16（1.041.45）,而非严重APE组分别为12.5%（0%37.5%）、12.5%（2.5%42.5%）和1.03（0.851.41）,严重APE组的各项指标均高于非严重组,两组间差异有统计学意义（P〈0.05）。相关分析显示,灌注缺损指数与RV/LV及栓塞指数均呈正相关（分别为r=0.635,P〈0.05;r=0.790,P〈0.05）。结论采用双源CT双能量肺灌注成像技术评价APE严重程度具有一定可行性。
