宝石能谱CT对肺癌生物治疗疗效观察价值的初步研究
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摘要
目的:
     通过测量及分析肺癌患者不同单能量下肿瘤的CT值及碘含量的变化,探讨CT能谱成像对肺癌生物治疗作用的应用价值。
     方法:
     选取40例肺癌患者(其中中央型肺癌20例,周围型肺癌20例),在生物治疗前后,均行能谱CT平扫及增强扫描,在宝石能谱成像浏览器(GSI viewer)软件下,观察分析肺癌患者生物治疗前、后肿瘤能谱曲线的变化,测量不同单能量(40keV-140keV)下治疗前、后肿瘤的CT值,并在碘基图上测量治疗前、后肿瘤的碘含量,进行数据分析及配对t检验。
     结果:
     40例肺癌患者,在不同单能量下,即50keV、70keV、90keV、110keV、130keV时,其生物治疗前、后肿瘤的CT值分别为: 133.38±17.26和99.01±18.42(HU)、75.92±14.10和53.62±13.81(HU)、49.47±13.39和28.83±7.50(HU)、43.53±12.25和22.97±7.31(HU)、37.37±12.13和17.01±4.50(HU),生物治疗前肿瘤内感兴趣区(ROI)的碘含量为:2.65±0.35(g/L),治疗后肿瘤的ROI碘含量为:1.56±0.38(g/L)。通过配对t检验,治疗后不同单能量下的肿瘤CT值及肿瘤内碘含量均较治疗前降低,两组间的差异具有统计学的
     意义(P<0.05)。
     结论:
     一、宝石CT能谱成像作为一种无创、快速的检查方法,可以对肺癌进行单能分析及碘基分析,为临床上肿瘤CT检查提供更多有价值的定性、定量信息。
     二、通过能谱成像及物质分离技术,宝石能谱CT有助于对肺癌生物治疗后疗效进行更详尽的评估。
Objective By measurement and analysis the lung cancer patients different single-energthe tumor CT value and the tumor iodine content changes,to explore the value of CT spectralimaging for biological therapy of lung cancer.
     Methods 40 cases biological therapy of lung cancer patients(20 cases were central lungcancer , 20 cases were peripheral lung cancer)were underwent spectral CT normal andenhancement scan. In gemstone spectral imaging viewer (GSI viewer) software, lung cancerpatients were measured the different single-energ(40keV-140keV) the tumor CT value and thetumor iodine content on the iodine-based image of before and after the biological therapy ,analysed the datas and paired t-test.
     Results
     40 cases patients with lung cancer in diferent single energy 50keV、70keV、90keV、110keV、130keV, its CT values of tumor before and after the biological therapy were:133.38±17.26 and 99.01±18.42(HU)、75.92±14.10 and 53.62±13.81(HU)、49.47±13.39 and28.83±7.50(HU)、43.53±12.25 and 22.97±7.31(HU)、37.37±12.13 and 17.01±4.50(HU).Iodine content of the tumor region of interest (ROI) in biological pre-therapy was 2.65±0.35(g/L),and biological post-therapy was 1.56±0.38(g/L).By paired t-test, differentsingle-energy CT value and iodine content in post-therapy were lower than that in pre-therapydifferent between pre-therapy and post-therapy . The difference between the two groups wasstatistically significant (P <0.05).
     Conclusions
     1. Gemstone CT spectral imaging was a noninvasive and rapid screening method , andcould provide more valuable qualitative and quantitative information through the single-energyand iodine-based analysis of lung cancer.
     2. By spectral imaging and material separation technology , gemstone spectral CT could geta more detailed assessmeny of the effects after the biological therapy of lung cancer .
引文
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