期刊文献+

噪声指数指导自动管电流调制技术在肺结核CT复查中降低辐射剂量的应用价值 被引量:3

下载PDF
导出
摘要 目的:探讨噪声指数指导自动管电流调制技术对肺结核患者CT复查中降低辐射剂量的应用价值。方法 CATPHAN500模体测试,采用噪声指数10~27,每次增加1进行图像采集,共采集18组,图像采集分别用肺和标准算法重建,获得噪声指数与高对比分辨率的关系。初诊患者采用常规剂量(噪声指数10)扫描,诊断为肺结核后复查时采用低剂量(噪声指数17)扫描,记录扫描中自动生成的受检者X线剂量参数,包括CT容积剂量指数(CTDIvol)、剂量长度乘积(DLP),采用5分制双盲法对图像作量化评价,测量升主动脉的SD值。结果模体测试,高对比分辨率在噪声指数〈19时,7LP/cm线对数均能清晰显示。初诊和复查时的图像质量主观评价均符合临床诊断要求。初诊及复查图像升主动脉SD值分别为(8.52±1.30)Hu、(13.90±2.37)Hu,差异有统计学意义(P〈0.05),复查时图像噪声大于初查睦。CTDIvol、DPL初诊时分别为(9.87±2.23)mGy、(333.79±73.24)mGy.cm,复查时分别为(4.15±1.96)mGy、(139.91±63.86)mGy.cm,二者差异均有统计学意义(P〈0.05)。结论噪声指数指导自动管电流调制技术用于肺结核CT复查,图像质量符合要求,且可降低对患者的辐射剂量。 Objective Application value and significance of noise index guiding automatic tube current modulation technique in pulmonary tuberculosis review by CT scanning. Methods CATPHAN500 model test,between the noise index of 10~27,each 1 increase in image acquisition,which were collected in 18 groups,respectively with lung and standard reconstruction algorithm,to obtain the relationship of noise figure and high contrast resolution. Patients were randomly selected in our hospital during January 2012 year to January 2013 year,and they were diagnosed if pulmonary tuberculosis with conventional dose(noise index 10)CT scan of the chest,55 cases of the patients needed to review the diagnosis,using low dose in the review(noise index 17)of chest CT scan, record CT scanning their X-ray dose parameters of automatic generation in detail,including CT volume dose index(CTDIvol)and dose length product(DLP). By 2 radiologists using 5 points double blind method for quantitative evaluation of images,measured SD value of the ascending aorta,and all the data for statistical analysis using SPSS13.0 software. Results In the model test,the high contrast resolution was used when the noise figure was less than 19,7LP/cm pairs can clearly display. Subjective assessment of image quality in newly diagnosed group and review diagnosed group were consistent with the clinical diagnostic requirements. In newly diagnosed group and review group photos ascending aortic SD values were(8.52±1.30)Hu and(13.90±2.37)Hu, both two groups had statistics significant difference(P〈0.05),and review diagnosed group photos noise were more than the newly diagnosed group. The average CTDIvol,DPL in newly diagnosed group were(9.87±2.23)mGy,(333.79±73.24)mGy. cm,and the average CTDIvol,DPL in review diagnosed group were(4.15±1.96)mGy,(139.91±63.86)mGy.cm,which the two groups’ difference had statistics significance respectively(P≤0.05). Conclusion Noise index guiding automatic tube current modulation technique in pulmonary tuberculosis review by CT scanning can significantly reduce the patient radiation dose, meanwhile images quality meet the clinical diagnostic requirements.
出处 《浙江临床医学》 2013年第12期1814-1816,共3页 Zhejiang Clinical Medical Journal
关键词 肺结核 X线体层摄影 辐射剂量 噪声指数 Pulmonary tuberculosis Tomography,X-ray computed Radiation dose Noise index
  • 相关文献

参考文献9

二级参考文献43

  • 1关文华,韩铭钧,秦培鑫,李坤伟.肺结核基本病变的多层螺旋CT低剂量扫描观察[J].中国防痨杂志,2007,29(6):549-551. 被引量:10
  • 2郑钧正,贺青华,李述唐,岳保荣,王琪,杨霞,张建峰.我国电离辐射医学应用的基本现状[J].中华放射医学与防护杂志,2001,21(S1):13-20. 被引量:64
  • 3郑钧正,岳保荣,李述唐,王琪,张建峰.我国“九五”期间X射线诊断的医疗照射频率水平[J].中华放射医学与防护杂志,2001(S1):20-24. 被引量:69
  • 4马玙,黄学锐.老年人肺结核的临床特点及诊治对策[J].中华老年医学杂志,2005,24(6):406-409. 被引量:57
  • 5Frush DP, Slack CC, Hollingsworth CL, et al. Computer- simulated radiation dose reduction for abdominal multidetector CT of pediatric patients. A JR, 2002, 179: 1107- 1113.
  • 6Das M, Mahnken AH, Muhlenbruch G, et al. Individually adapted examination protocols for reduction of radiation exposure for 16 - MDCT chest examinations. AJR, 2005, 184: 1437- 1443.
  • 7Hur G, Hong SW, Kim SY, et al. Uniform image quality achieved by tube current modulation using SD of attenuation in coronary CT angiography. AJR, 2007, 189: 188- 196.
  • 8McCollough CH, Bruesewitz MR, Kofer JM Jr, et al. CT dose reduction and dose management tools: overview of available options. Radiographics , 2006, 26:503 - 512.
  • 9Irie T, Inoue H. Individual modulation of the tube current - seconds to achieve similar levels of image noise in contrast - en- hanced abdominal CT. A JR, 2005, 184:1514 - 1518.
  • 10World Health Organization. Global tuberculosis control--surveillance, planning, financing. WHO/HTM/TB/2007. 376 [ EB/OL]. http://www. who. int/tb/publications/global- report/2007/en/ index.html.

共引文献75

同被引文献33

  • 1肖强,岳伟东,王忠睿,刘毅.16层螺旋CT诊断颅面部外伤96例分析[J].重庆医学,2007,36(9):869-871. 被引量:4
  • 2Albrecht T, Foert E, Hohkamp R, et al. 16-MDCT angiography of aor- toiliac and lower extremity arteries: comparison with digital subtraction angiagraphy[J]. A JR Am J Roentgenol,2007,189(3): 702-711.
  • 3McCollough CH, Primak AN, Braun N, et al. Strategies for reducing ra- diation dose in CT [J]. Radiol Clin North Am, 2009. 47(1): 27-40.
  • 4Huda W, Sealzetti EM, Levin G. Technique factors and image quality as functions of patient weight at abdominal CT[J].Radiology,2000,217(2): 430-435.
  • 5Zhang WL, Li M, Zhang B, et al. CT Angiography of the Head-and- Neck Vessels Acquired with Low Tube Voltage, Low Iodine, and hera- tire Image Reconstruction: Clinical Evaluation of Radiation Dose and Image Quality[J]. PLoS One,2013,8(12): e81486.
  • 6Beitzke D, Wolf F, Edelhauser G, et al. Computed tomography angiogra- phy of the carotid arteries at low kV (p) settings_ a prospective ran- domised trial assessing radiation dose and diagnostic confidence[J]. Eur Radiol, 2011,21(11 Germany) : 2434-2344.
  • 7Sano T, Matsutani H, Kondo T, et al. [Prospective electrocardiogram gat- ed coronary 320-row area detector computed tomography angiography using low tube current scanning with full reconstruction] [J]. Nihon Hnshasen Gijutsu Gakkai zasshi,2013, 69(3 Japan):244-250.
  • 8Lee EJ, Lee SK, Agid R, et al.Comparison of image quality and radiation dose between fixed tube current and combined automatic tube current modulation in craniocervical CT angiography[J]. AJNR Am J Neuroradi- ol,2009,30(9): 1754-759.
  • 9Sookpeng S, Martin C J, Gentle D J, et al. Relationships between patient size, dose and image noise under automatic tube current[J], modulation systems. J Radiol Prot,34(1):2013,103-123.
  • 10张富生,李秋芬,李保银,袁卫国,刘瑞琦.肺结核患者低剂量螺旋CT检查的临床意义[J].现代中西医结合杂志,2009,18(10):1157-1158. 被引量:2

引证文献3

二级引证文献4

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部