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- 2018
首过期双输入模型容积CT灌注成像在肺结节诊断中的价值
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Abstract:
摘要 目的:探讨320排动态容积CT首过期内双输入肺灌注成像对肺结节诊断的临床应用价值.方法:收集因肺部疾病需要进行增强扫描的133例患者,包括36例炎性肺结节和97例恶性肺结节,采用东芝320排CT对其进行首过期容积灌注成像,采用自适应迭代重建方法进行图像重建,并使用双输入数学模型最大斜率法进行灌注指数的定量分析,采用感兴趣区(ROI)技术测量肺结节及正常肺组织的肺动脉血流量(PAF)、支气管动脉血流量(BAF),比较正常肺组织及不同肺内病灶的肺循环和体循环血流构成比的差异.结果:肺部CT灌注成像总的最大有效剂量为6.47 mSv;36例炎性肺结节的PAF均值为(140.6±50.8)mL/min/100mL,BAF均值为(28.1±27.3)mL/min/100 mL;97例恶性肺结节的PAF均值为(53.1±25.2)mL/min/100 mL,BAF均值为(84.4±20.6)mL/min/100 mL;133例患者在病灶对侧同层面正常肺组织的PAF值为(130.6±20.8)mL/min/100 mL;BAF值为(1.6±2.7)mL/min/100 mL.3者之间的灌注参数差异具有统计学意义(P<0.05).结论:320 排动态容积CT灌注成像技术能评估肺组织及肺结节肺循环和体循环血流构成比情况,对恶性及炎症性肺结节的鉴别诊断具有一定的参考意义.
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