超低剂量CT联合高级建模迭代重建算法在成人肺结核检查中的可行性研究  

Feasibility of ultra-low-dose CT combined with advanced modeling iterative reconstruction algorithm for tuberculosis screening in adults

作　　者：姜一 秦立新 JIANG Yi;QIN Li-xin(Department of Radiology,Wuhan Pulmonary Hospital,Wuhan 430030,China)

机构地区：[1]武汉市肺科医院放射科,武汉430030

出　　处：《医疗卫生装备》2024年第4期74-77,共4页Chinese Medical Equipment Journal

摘　　要：目的:探讨超低剂量CT能谱纯化技术联合高级建模迭代重建(advanced modeling iterative reconstruction,ADMIRE)算法在成人肺结核检查中的可行性。方法:选取2022年5—12月某院收治的120例继发性肺结核(Ⅲ型)患者,按照随机数字表法将其分为A组、B组、C组、D组,每组30例。A组行常规剂量扫描,管电压为120 kV,管电流为110 mAs,采用滤波反投影重建算法;B组行低剂量扫描,管电压为120 kV,管电流为70 mAs,采用ADMIRE算法(3级);C组行低剂量扫描,管电压为100 kV,管电流为110 mAs,采用ADMIRE算法(3级);D组行超低剂量扫描,管电压为Sn100 kV,管电流为110 mAs,采用ADMIRE算法(3级)。比较4组患者的有效剂量(effective dose,ED)值、图像主观评分及客观评价指标等。采用SPSS 17.0统计学软件对数据进行处理。结果:4组患者的ED值、纵隔窗图像的主观评分、纵隔窗图像的信噪比及对比度噪声比比较,差异有统计学意义(P<0.05)。4组患者的肺窗图像主观评分、肺窗图像的信噪比及对比度噪声比比较,差异无统计学意义(P>0.05)。结论:超低剂量CT能谱纯化技术联合ADMIRE算法能够减少成人肺结核患者检查中的辐射剂量,同时图像质量能够满足临床诊断要求。Objective To explore the feasibility of the ultra-low-dose CT energy spectrum purification technique combined with the advanced modeling iterative reconstruction(ADMIRE)algorithm for adult tuberculosis screening.Methods Totally 120 patients with secondary tuberculosis(typeⅢ)admitted to some hospital from May to December 2022 were selected and divided into groups A,B,C,and D with a random number table,with 30 patients in each group.Group A underwent conventional dose scanning with a tube voltage of 120 kV,a tube current of 110 mAs and was treated with the filtered back projection reconstruction algorithm;group B went through low-dose scanning with a tube voltage of 120 kV and a tube current of 70 mAs,and was treated with ADMIRE algorithm(level 3);group C was exposed to low-dose scanning with a low tube voltage of 100 kV and a tube current of 110 mAs,and was treated with the ADMIRE algorithm(level 3);group D was subjected to ultra-low-dose scanning with a tube voltage of Sn100 kV and a tube current of 110 mAs,and treated with the ADMIRE algorithm(level 3).The four groups were compared in terms of effective dose(ED),image subjective score and objective evaluation index and etc.SPSS 17.0 software was used for data processing.Results The differences between the four groups were statistically significant in ED value and subjective score,signal-to-noise ratio(SNR)and contrast noise ratio(CNR)of mediastinal window images(P<0.05),while not in subjective score,SNR and CNR of lung window images(P>0.05).Conclusion The ultra-low-dose CT energy spectrum purification technique combined with the ADMIRE algorithm reduces the radiation dose in the examination of adult tuberculosis patients while the image quality meets the clinical diagnostic requirements.

关 键 词：超低剂量CT ADMIRE 迭代算法 肺结核 能谱纯化技术 

分 类 号：R318[医药卫生—生物医学工程] R816.4[医药卫生—基础医学]