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第三代双源CT低管电压联合高级建模迭代重建在儿童腺样体检查中的价值 预览

The value of third-generation dual-source CT low-pressure voltage combined with ADMIRE in children′s nasopharynx examination
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摘要 目的探讨第三代双源CT低管电压(70kVp)扫描联合高级建模迭代重建ADMIRE技术在儿童腺样体检查中的应用价值。方法临床疑腺样体肥大患儿,行CT扫描,按就诊时间先后顺序分为两组,A组(40例):行低管电压(70kVp)扫描,参考管电流163mAs,采用ADMIER重建,强度3级;B组(40例):常规100kVp,参考管电流163mAs,常规FBP重建;其余扫描参数不变。比较两组图像的主观评分和图像质量客观指标包括(CT值、图像噪声、信噪比SNR、对比噪声比CNR及辐射剂量。结果A、B两组辐射剂量比较差异有统计学意义(P<0.05),A组较B组辐射剂量降约77.58%;与B组比较,A组图像噪声增加0.002%;SNR降低0.01%;CNR升高0.03%;图像质量客观评价指标及主观评分比较差异无统计学意义(P>0.05)。结论第三代双源CT低管电压(70kVp)联合ADMIRE重建技术行儿童腺样体扫描,能有效降低辐射剂量的同时且保证图像质量。 Objective Exploration of the application value of the third-generation dual source CT low tube voltage(70 kVp)scanning combined with advanced modeling iterative reconstruction(ADMIRE)technique in children with adenoid examination. Methods CT scans were performed in patients with clinically suspected adenoid hypertrophy. They were divided into two groups according to the time of treatment. Group A(40 cases):low tube voltage(70 kVp)scan,reference tube current 163 mAs,reconstruction with ADMIER,Intensity 3;Group B(40 cases):conventional 100 kVp,reference tube current 163 mAs,conventional(filtered back-projection,FBP)reconstruction;rest of the scanning parameters remained unchanged. The subjective scores and objective quality indicators of the images(CT value,image noise,signal noise ratio(SNR),contrast noise ratio(CNR))and radiation dose of the two groups were compared. Results The difference of radiation dose between group A and group B was statistically significant(P < 0.05). The radiation dose of group A was lower than that of group B by 77.58%. Compared with group B,the image noise of group A increased by 0.002%;the SNR decreased by 0.01%;CNR increased by 0.03%;there was no significant difference in objective quality evaluation index and subjective score between two groups in the image quality(P > 0.05). Conclusion The third-generation dual-source CT low-tube voltage(70 kVp)combined with ADMIRE reconstruction technique for children with adenoid scan can effectively reduce the radiation dose while ensuring image quality.
作者 施辉友 陆泓宇 崔学龙 张小勇 曾宪春 SHI Huiyou;LU Hongyu;CUI Xuelong;ZHANG Xiaoyong;ZENG Xianchun(Department of Radiology, Guizhou Provincial People′s Hospital, Guiyang 550002, China)
出处 《实用医学杂志》 CAS 北大核心 2019年第4期641-644,共4页 The Journal of Practical Medicine
关键词 第三代双源CT 低管电压 ADMIRE重建 腺样体 辐射剂量 third generation dual source CT low tube voltage ADMIRE nasopharynx radiation dose
作者简介 通信作者:曾宪春,E-mail: zengxianchun04@foxmail.com.
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