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| Application of different tube voltage and noise index in CTA of two lower extremities |
| TAO Lei, SHENG Mao, LI Ruomei |
| Department of imaging, Guangde Road, Hefei Second People's Hospital, Hefei 230011 China |
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Abstract Objective To study selecting different tube voltage and image noise index to reduce the radiation dose received by patients in CTA of lower extremities without sacrificing the quality of images. Methods According to different body mass index, seventy patients undergoing CTA with lower limbs were divided into control group and observation group. The tube voltages were 100kV and 80kV, and the noise indexes were 15 and 20, respectively. Use the GE Light Speed64 VCT machine with automatic tube current regulation. Calculate the radiation dose to both groups of patients. Statistical data were measured with (x±s) markers and t test was used. P<0.05 was considered statistically significant. Results The dose length product (DLP) and effective dose (ED) in the observation group were 53% lower than those in the control group. There was a statistically significant difference between the two groups (P<0.05). Conclusion According to the BMI value of the patient, reducing the tube voltage and raising the noise index within the appropriate range can effectively reduce the radiation dose to the patient.
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Received: 04 March 2018
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[1] European Commission.European guidelines on quality criteria for computed tomography(EUR 16262 EN)[R].Luxembourg:European Commission,1999:32.
[2] Davies HE,Wathen CG,Gleeson FV.The risks of radia-tion exposure related to diagnostic imaging and how to mini-mise them[J].BMJ,2011,342:d947.
[3] Utsunom D,Oda S,Funama Y,et al.Comparison of standard-and low-tube voltage MDCT angiography in patients with peripheral arterial disease[J].Eur Radiol,2010,20:2758-65.
[4] Alkadhi H,Schindera ST.State of the art low-dose CT angiography of the body[J].EUR J Radiol,2011,80:36-40.
[5] 陈博、徐雷、程建敏,等.100kVp碘克沙醇联合iDose4迭代重建技术在下肢动脉CTA成像中的应用[J].中华医学杂志,2015,95(47):3833-3838.
[6] 李爱敬,宋爱芹,潘宇宁,等.低kV结合迭代重建在下肢动脉CT血管造影中的应用[J].中华放射医学与防护杂志,2016,36(6):465-469.
[7] 王懿.低管电压扫描下肢CT血管成像的辐射剂量及图像质量[J].中国实用医刊,2015,42(22):95-97.
[8] Hamberg LM,Rhea HJ,Hunter GJ,et al.Mulit detector row CT:ra-diation dose characteristicts[J].Radiology,2003,226(3):762-772.
[9] McCollough C,Primak AN,Braun N,et al.Strategies for reducing radiation dose in CT[J].Radiol Clin North Am,2009,47(1):27-40.
[10] 葛琛瑾,舒政.下肢动脉低剂量CTA技术研究进展[J].中国中西医结合影像学杂志,2017,15(2):251-253. |
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