摘要
目的探讨能谱CT支气管动脉成像在中央型肺癌中的应用价值,为其临床治疗提供理论依据。方法对53例中央型肺癌患者影像资料进行分析。全部患者应用能谱CT进行胸部增强检查,再利用容积再现(VR),多平面重组(MPR)、最大密度投影(MIP)等技术对140kVp混合能量(quality check,QC)图像和最佳单能量(optimal keV)图像进行二维、三维重建,分别比较两组图像的支气管动脉CT值,信号噪声比(SNR)及对比噪声比(CNR),另请两位高年资影像科医师对图像质量进行评分。结果53例患者的最佳单能量值在(55~63)keV区间,多数位于58keV;与QC图像比较,其CNR、SNR和支气管动脉CT值更高,二者比较差异有统计学意义(P<0.05)。另外,最佳单能量图像的支气管动脉主观质量评分同样高于QC图像(P<0.05)。结论能谱CT单能量成像可以为支气管动脉提供更丰富、精准的影像学资料,为中央型肺癌的介入治疗提供更丰富的理论支持。
Objective To explore the application value of Gemstone spectral CT bronchial artery imaging in central lung cancer,and provide theoretical basis for its clinical treatment.Methods The imaging data of 53 patients with central lung cancer were analyzed.All patients were treated with Gemstone spectral CT for chest enhancement examination,and the 140kVp mixed energy(quality check,QC) images and the optimal keV images were reconstructed by using volume rendering (VR),multi-planar recombination (MPR) and maximum density projection (MIP).We compared the bronchial artery CT values,signal-to-noise ratio(SNR) and contrast-to-noise ratio(CNR) of the two groups of images.Two senior digital imaging physicians were also asked to rate the image quality.Results The optimal keV value of 53 patients was in the range of (55-63)keV,and most of them were at 58keV.The SNR,CNR and bronchial artery CT values were higher compared to QC images.There was a statistically significant difference between the two groups ( P <0.05).In addition,the subjective quality score of the bronchial artery in the optimal keV image was also higher than that in the QC image ( P <0.05).Conclusion Gemstone spectral CT single-keV imaging can provide more abundant and accurate imaging data for bronchial artery,and provide more help for the interventional treatment of central lung cancer.
作者
周智越
曹绍东
韩东
王可铮
张同
Zhou Zhiyue;Cao Shaodong;Han Dong(Department of Radiology,The Fourth Affiliated Hospital,Harbin Medical University,Heilongjiang 150001,China)
出处
《医学研究杂志》
2019年第8期150-153,99,共5页
Journal of Medical Research
关键词
能谱CT
单能量图像
支气管动脉
CT血管造影
介入治疗
Gemstone spectral CT
Single-keV image
Bronchial artery
CT angiography
Interventional therapy
