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
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摘要
目的探讨第三代双源CT低管电压(70 kVp)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(70 kVp)扫描,参考管电流163 mAs,采用ADMIER重建,强度3级;B组(40例):常规100 kVp,参考管电流163 mAs,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(70 kVp)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.
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.
引文
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[13]杨萌,张璋,李锋坦,等.第三代双源CT双低肺动脉成像降低线束硬化伪影的可行性研究[J].放射学实践,2018,33(4):378-382.
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[2]易城辉,孙继洪,梁荣生,等.多层螺旋CT低剂量扫描在儿童鼻咽部检查中的临床应用[J].中国医疗前沿,2013,8(14):10-11.
[3]BRENNER D J,HALL E J.Computed tomography--an increasing source of radiation exposure[J].N Engl J Med,2007,357(22):2277-2284.
[4]MARTINI K,BARTH B K,NGUYEN-KIM T D,et al.Evaluation of pulmonary nodules and infection on chest CT with radiation dose equivalent to chest radiography:Prospective intra-individual comparison study to standard dose CT[J].Eur J Radiol,2016,85(2):360-365.
[5]HAUSLEITER J,MARTINOFF S,HADAMITZKY M,et al.Image quality and radiation exposure with a low tube voltage protocol for coronary CT angiography results of the PROTECTION IITrial[J].JACC Cardiovasc Imaging,2010,3(11):1113-1123.
[6]侯金玲,赵颖,高立栋.双源螺旋CT小剂量扫描对患儿鼻咽部图像质量的影响[J].医疗装备,2017,30(1):1-3.
[7]曾宪春,王谦,韩丹,等.80 kVp扫描联合基于原始数据的迭代重建技术在眼外伤CT检查中的价值[J].实用放射学杂志,2015,31(11):1879-1882.
[8]唐雷,王谦,曾宪春,王玉权,王荣品.家犬胸部低管电压扫描结合迭代重建SAFIRE技术的运用[J].实用医学杂志,2015,31(20):3298-3301.
[9]杨晶,高艳,李坤成,等.比较两种低剂量CT迭代重建法与常规剂量滤波反投影重建法的图像质量[J].中国医学影像技术,2014,30(1):117-121.
[10]唐雷,周瑶,曾宪春,等.基于第3代双源CT模拟婴幼儿颅脑低剂量扫描的实验研究[J].中国医学影像技术,2018,34(7):964-968.
[11]PARK C,GRUBER-ROUH T,LEITHNER D,et al.Singlesource chest-abdomen-pelvis cancer staging on a third generation dual-source CT system:comparison of automated tube potential selection to second generation dual-source CT[J].Cancer Imaging,2016,16(1):33.
[12]赵晓静,赵澄,王佩佩,等.第三代双源CT双低扫描模式在头颈部血管成像中的应用[J].中华老年心脑血管病杂志,2018,20(6):568-571.
[13]杨萌,张璋,李锋坦,等.第三代双源CT双低肺动脉成像降低线束硬化伪影的可行性研究[J].放射学实践,2018,33(4):378-382.
[14]MEULEPAS J M,RONCKERS C M,AMJB S,et al.Radiation exposure from pediatric CT scans and subsequent cancer risk in the netherlands[J].J Natl Cancer Inst,2018,233(18):6406-6413.