摘要
目的探讨第二代双源CT虚拟平扫技术在肺部病变中的应用价值。方法回顾性分析58例经病理证实肺部病变患者的影像资料,均行常规平扫及双能量增强扫描,利用"Liver VNC"软件处理得到虚拟平扫图像。比较虚拟平扫与常规平扫图像质量评分、噪声、病灶平均CT值及辐射剂量。结果虚拟平扫与常规平扫图像质量评分分别为(4.62±0.52)、(4.71±0.46)分,两者无明显差异t=2.319,P>0.05;虚拟平扫图像和常规平扫图像噪声分别为(8.10±1.16)、(7.30±1.06)HU,虚拟平扫噪声略高于常规平扫t=5.246,P<0.05;虚拟平扫与常规平扫病变CT值分别为(32.65±8.09)、(27.94±7.16)HU,t=-8.154,P<0.05;且两组CT值有很好的一致性(r=0.840,P<0.05)。虚拟平扫与常规平扫的有效剂量分别为(5.18±0.96)、(5.55±1.18)mSv,虚拟平扫有效剂量低于常规平扫t=4.005,P<0.05。结论虚拟平扫图像对肺部病变显示良好,可满足诊断要求,有代替胸部常规平扫潜在价值,减少检查时间及患者的辐射剂量。
【Objective】To assess the clinical application of virtual non-contrast（VNC） of the second generation dual-energy CT in pulmonary lesions.【Methods】Fifty-eight patients with pathological diagnosis of pulmonary lesions underwent ture non-contrast（TNC）and dual-energy enhanced scanning.Through post-processing obtain virtual non-contrast（VNC）.Comparing the imaging quality score,noise,mean CT HU values in pulmonary lesions and radiation dose of both.【Resluts】The imaging quality score of VNC and TNC were（4.62±0.52） and（4.71±0.46）,There was no significant difference（t=2.319,P＆gt;0.05）.The noise of VNC was upper than that of TNC and the difference was significant（8.10±1.16）HU and（7.30±1.06） HU,t=5.246,P＆lt;0.05）.The mean CT HU value of pulmonary lesions on VNC were higher than that on TNC（32.65±8.09） HU and（27.94±7.16） HU,t=-8.154,P＆lt;0.05）and show good agreement（r=0.840,P＆lt;0.05）.The radiation dose of VNC was lower than that of TNC and the difference was significant（5.18±0.96） mSv and（5.55±1.18） mSv,t=4.005,P＆lt;0.05）.【Conclusion】The VNC image can meet the requirements of clinical diagnosis,it can replace TNC image,save inspection time and ruduce patient radiation dose.
出处
《中国医学工程》
2013年第3期12-13,15,共3页
China Medical Engineering
