能谱纯化超低剂量胸部CT扫描在儿童检查中的辐射剂量与图像质量研究  

Image Quality and Radiation Dose of Spectral Shaping Ultra-low Dose Chest CT Scanning in Pediatric Patients

作　　者：杨景勇 邓小飞 郗艳 舒政 YANG Jing-yong;DENG Xiao-fei;XI Yan;SHU Zheng(Department of Radiology,Shanghai University of TCM,Shanghai TCM-Integrated Hospital,Shanghai 200082,China)

机构地区：[1]上海中医药大学附属上海市中西医结合医院放射科,上海虹口200082

出　　处：《中国CT和MRI杂志》2025年第4期112-114,共3页Chinese Journal of CT and MRI

基　　金：上海市虹口区卫生健康委员会医学科研课题计划(虹卫1801-04)。

摘　　要：目的评估能谱纯化(Sn)超低剂量胸部CT在儿童检查中的辐射剂量与图像质量。方法收集2023年9月至2024年2月期间因怀疑肺炎而进行胸部CT扫描的儿童患者,第1组管电压70kV共9例,第2组Sn100kV共21例,第3组100kV共19例,第4组110kV共13例,第5组120kV共7例。客观评估包括噪声(SD_(脂肪))、信噪比(SNR)和对比噪声比(CNR),主观评价使用Likert评分,计算并比较有效辐射剂量(ED)。结果5组的ED分别为0.18±0.01、0.15±0.04、1.73±0.60、2.68±0.66和4.46±0.81mSv。Sn100kV组的SD脂肪和SNR较70kV改善,较100、110和120kV差异不具有统计学意义(P>0.05),CNR较120kV组低(P<0.05),Likert评分大于70kV但小于120kV组(P<0.05),较100和110kV差异不显著(P>0.05)。结论Sn超低剂量儿童胸部CT检查的图像质量良好,并显著降低辐射剂量。Objective To evaluate the radiation dose and image quality of spectral shaping(Sn)ultra-low dose chest CT in pediatric examinations.Methods Chest CT examinations were performed on pediatric patients suspected of pneumonia between September 2023 and February 2024.There were 9 patients with a tube voltage of 70 kV in Group 1,21 patients with Sn100 kV in Group 2,19 cases with 100 kV in Group 3,13 cases with 110 kV in Group 4,and 7 cases with 120 kV in Group 5.CT noise(SD_(fat)),signal-to-noise ratio(SNR),and contrast-to-noise ratio(CNR)were parameters used for objective assessment.A Likert visual score was utilized for subjective evaluation.The radiation effective dose(ED)was measured and compared between groups.Results The ED values of the 5 groups were 0.18±0.01,0.15±0.04,1.73±0.60,2.68±0.66,and 4.46±0.81 mSv,respectively.The SDfat and SNR of the Sn100kV group showed improvement when compared to the 70kV group,with no statistically significant difference observed when compared to the 100,110,and 120kV groups(P>0.05).The CNR in the Sn100kV group was significantly lower than in the 120kV group(P<0.05),and the Likert score was higher than in the 70kV group but lower than in the 120kV group(P<0.05).There was no statistically significant difference among the Sn100kV group,the 100kV group,and the 110kV group(P>0.05).Conclusion The image quality of Sn ultra-low dose chest CT examination for pediatric patients is excellent,and the radiation dosage is significantly reduced.

关 键 词：儿童 胸部 计算机断层成像 低剂量 能谱纯化 

分 类 号：R445[医药卫生—影像医学与核医学]