| 低剂量CT扫描技术在青少年骶髂关节中的应用 |
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| 引用本文： | 梁振华,方挺松,黄钰坚,潘邦盛,李均洪.低剂量CT扫描技术在青少年骶髂关节中的应用[J].CT理论与应用研究,2018,27(1):71-76. |
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| 作者姓名： | 梁振华 方挺松 黄钰坚 潘邦盛 李均洪 |
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| 作者单位： | 广州中医药大学附属佛山市中医院 a. 医学影像科CT室;b. 病案统计室, 广东 佛山 528000 |
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| 基金项目： | 佛山市卫生和计划生育局项目，佛山市重点专科培育项目 |
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| 摘 要： | 目的:探讨低剂量CT扫描技术在青少年骶髂关节中的可行性应用价值，确定其CT扫描最优参数。方法:采用PHILIPS 64排128层螺旋CT扫描仪，选择年龄在14~30岁、体重<75kg、身体质量指数（BMI）<25的青少年患者150人，随机分成3组。常规剂量组，应用管电压120 k V、管电流250 m As；低剂量A组，应用管电压120 k V、管电流100 m As；低剂量B组，应用管电压100 k V、管电流100 m As。对骶髂关节进行扫描。记录3组CT扫描模式的容积CT剂量指数（CTDIvol）和剂量长度乘积（DLP）。由两位医师采用双盲法对图像质量进行独立评分，取平均值。统计方法采用秩和检验、方差分析。结果:3组患者的图像质量均可满足诊断要求，无统计学意义（P>0.05）；低剂量组B的辐射剂量较常规组显著下降，存在显著性差异（P<0.05）。结论:100 k V、100 m As低剂量扫描技术可保证图像质量满足临床诊断要求并显著降低患者的辐射剂量。
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| 关 键 词： | 骶髂关节 低剂量 体层摄影技术 X线计算机 青少年 |
| 收稿时间： | 2017-06-06 |
Application of Low Dose CT Scanning in the Sacroiliac Joint of Adolescents |
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| LIANG Zhen-hua,FANG Ting-song,HUANG Yu-jian,PAN Bang-sheng,LI Jun-hong.Application of Low Dose CT Scanning in the Sacroiliac Joint of Adolescents[J].Computerized Tomography Theory and Applications,2018,27(1):71-76. |
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| Authors: | LIANG Zhen-hua FANG Ting-song HUANG Yu-jian PAN Bang-sheng LI Jun-hong |
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| Institution: | Department of CT, Foshan Hospital of Traditional Chinese Medicine, Guangzhou University of Traditional Chinese Medicine, Foshan 528000, China |
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| Abstract: | Objective: To investigate the feasibility of low-dose CT scanning in the sacroiliac joint of adolescents and to determine its optimal parameters. Methods: With the application of PHILIPS 64-row 128-slice spiral CT scanner, a total of 150 adolescents aged 14～30 years (weight < 75 kg and BMI< 25) were selected in the study and then randomly divided into three groups. In the conventional dose group, the tube voltage was 120 kV and the tube current was 250 mAs; low dose group A applied a tube voltage of 120 kV and tube current of 100 mAs, and in low dose group B, the he tube voltage was 100kV and the tube current was 100 mAs. Sacroiliac joints among three groups were scanned. Volume CT dose index (CTDIvol) and dose length product (DLP) were recorded in the CT scanning patterns of the three groups. The image quality was independently scored and averaged by two physicians by using double blind method, scores were averaged. Rank-sum test and variance analysis were used for statistical analysis. Results: The image quality of the three groups could meet the diagnostic requirements, and there was no statistical significance (P > 0.05). The radiation dose in low dose group B was significantly lower than that in conventional dose group, showing a significant difference (P < 0.05). Conclusion: Low dose scanning technique using tube voltage of 100 kV and tube current of 100 mAs can ensure the image quality, meet the diagnostic requirements and significantly reduce the patient's radiation dose. |
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