能谱CT在糖尿病足部动脉成像中小血管的图像质量应用探究  

Image Quality Inprovement for Small Vessel in Diabetic Foot Arteriography Using Dual-energy Computed Tomography

作　　者：臧奕恺 李静 陆秀良 严诚 ZANG Yikai;LI Jing;LU Xiuliang;YAN Cheng(Department of Radiology,Zhongshan Hospital,Fudan University,Shanghai 200023,China;Shanghai United imaging Healthcare Co.,Ltd.,Shanghai 201815,China)

机构地区：[1]上海市复旦大学附属中山医院放射科,上海200032 [2]上海联影医疗科技有限公司,上海201815

出　　处：《CT理论与应用研究(中英文)》2025年第1期83-88,共6页Computerized Tomography Theory and Applications

摘　　要：目的:探究能谱CT在糖尿病患者足部动脉造影中小血管成像的应用价值。材料和方法:前瞻性收集2022年1月至2023年1月于我院放射科行下肢血管CTA检查的30例糖尿病患者。在患者行下肢CT血管造影(传统CTA组)后,立即采集足部血管的能谱图像,获得最佳虚拟单能图像(能谱CTA组),将两组的足部图像进行比较,以观察足部动脉小血管的显示并且计算对比噪声比(CNR)和信噪比(SNR)。使用5分法对动脉走向和小血管显示进行评分。结果:能谱CTA组中的CNR和SNR显著优于传统CTA组。能谱CTA组的胫后动脉和足背动脉的主观评分也显著高于传统CTA组(均>3分)。结论:与传统CTA成像相比,能谱成像能够提供更好的图像质量,提高足动脉造影的诊断性能,增加医生对疾病诊断的信心。Objective:To investigate the feasibility of dual-energy computed tomography(DECT)in foot arteriography for small vessel image quality in patients with diabetes.Methods:A total of 30 patients with diabetes were enrolled prospectively between January and November 2022 in the radiology department of our hospital,where DECT was acquired immediately after the CT angiography(routine CTA group)of the lower extremity.The optimal virtual monochromatic images(DECT group)were derived from the DECT data.Image quality was assessed by measuring the CT values and noise in foot arteries,and signal-tonoise ratio(SNR)and contrast-to-noise ratio(CNR)were calculated.The arterial course and small vessel display were scored using a 5-point scale(1,poor;5,excellent).Results:The CNR and SNR were significantly better in the DECT group than in the routine CTA group.The DECT group received higher subjective scores on the posterior tibial artery and the foot arteries(all>3)than did the routine CTA group.Conclusion:Compared to the routine CTA imaging,DECT offers superior image quality for foot arteriography,thereby enhancing the diagnostic accuracy of foot arteriography and bolstering physicians’confidence in disease diagnosis.

关 键 词：能谱CT 足部血管CT造影 虚拟单能图像 图像质量 糖尿病 

分 类 号：R814.42[医药卫生—影像医学与核医学] R587.1[医药卫生—放射医学]