双源双能量CT图像优化技术对肺动脉成像图像质量的影响  

Effect of optimization technique for dual-energy CT on quality of pulmonary angiography image

作　　者：卞佳[1] 苏文静 殷志杰[1] 李泉[1] BIAN Jia;SU Wenjing;YIN Zhijie;LI Quan(Department of Radiology,Binzhou Medical University Hospital,Binzhou 256603,Shandong,P.R.China)

机构地区：[1]滨州医学院附属医院放射科,山东滨州256603

出　　处：《滨州医学院学报》2024年第1期52-54,共3页Journal of Binzhou Medical University

摘　　要：目的定量评价双源双能量CT最佳单能量成像技术及非线性融合技术对肺动脉图像质量影响。方法回顾性分析28例肺动脉栓塞患者影像学资料,经处理获得100 kVp图像(A组)、140 kVp图像(B组)、非线性融合图像(C组)及最佳单能量图像(D组),分别测量4组图像中肺动脉栓子的CT值、噪声及邻近血管CT值,计算信噪比(SNR)及对比噪声比(CNR),进行相应统计学分析。结果4组图像间栓子CT值差异无统计学意义;噪声、CNR、SNR等参数差异具有统计学意义(P<0.05);其中非线性融合图像质量最佳;最佳单能量图像较常规图像也具有一定优势。结论非线性融合技术及最佳单能量成像技术可以优化肺动脉图像成像质量。Objective To quantitatively evaluate the effect of optimal monochromatic imaging technique and non-linear blending technique for dual-energy CT on image of pulmonary angiography.Methods Imaging data of 28 patients with pulmonary embolism were retrospectively analyzed.Data obtained with 100 kVp,140kVp,non-linear blending images and optimized monoenergetic images were divided into group A,B,C and D respectively.CT value of emboli,noise value of emboli and CT value of adjacent vessel were measured,signal to noise ratio(SNR)and contrast to noise ratio(CNR)were calculated.Corresponding statistical analysis was carried out.Results There was no statistical difference for CT value of CTPA among the four groups.The differences of noise,CNR,and SNR parameters were statistically significant(P<0.05),and among them,non-linear blending images showed superior quality.The optimal monoenergetic images also had certain advantages over the conventional ones.Conclusion Non-linear blending technique and optimal monochromatic imaging technique can optimize the imaging quality of pulmonary artery images.

关 键 词：肺动脉栓塞 体层摄影术 X线计算机 双能量 

分 类 号：R445.3[医药卫生—影像医学与核医学]