ISSN 1004-4140
CN 11-3017/P
王晨思, 洪瑶, 方慧敏, 丁雪璐, 杨怡帆, 田香宝, 陈文静, 王永胜. 基于自动管电流调制技术下不同螺距对颈部CTA辐射剂量及图像质量影响的研究[J]. CT理论与应用研究. DOI: 10.15953/j.ctta.2023.148
引用本文: 王晨思, 洪瑶, 方慧敏, 丁雪璐, 杨怡帆, 田香宝, 陈文静, 王永胜. 基于自动管电流调制技术下不同螺距对颈部CTA辐射剂量及图像质量影响的研究[J]. CT理论与应用研究. DOI: 10.15953/j.ctta.2023.148
WANG Chensi, HONG Yao, FANG Huimin, DING Xuelu, YANG Yifan, TIAN Xiangbao, CHEN Wenjing, WANG Yongsheng. Based on the Effect of Different Pitches on Neck CTA Radiation Dose and Image Quality under Automatic Tube Current Modulation Technology[J]. CT Theory and Applications. DOI: 10.15953/j.ctta.2023.148
Citation: WANG Chensi, HONG Yao, FANG Huimin, DING Xuelu, YANG Yifan, TIAN Xiangbao, CHEN Wenjing, WANG Yongsheng. Based on the Effect of Different Pitches on Neck CTA Radiation Dose and Image Quality under Automatic Tube Current Modulation Technology[J]. CT Theory and Applications. DOI: 10.15953/j.ctta.2023.148

基于自动管电流调制技术下不同螺距对颈部CTA辐射剂量及图像质量影响的研究

Based on the Effect of Different Pitches on Neck CTA Radiation Dose and Image Quality under Automatic Tube Current Modulation Technology

  • 摘要: 目的:研究基于自动管电流调制技术下不同管螺距对颈部CTA辐射剂量及图像质量的影响。资料与方法:选择上海市金山区亭林医院2022年09月至2023年05月临床进行颈部CTA检查的患者共120例,男性52例,女性68例,年龄在45-86岁间,平均年龄66.76岁。根据不同螺距使用随机表法将患者分配到A、B、C三组,A组为0.8螺距共40例、B组为1.0螺距共40例、C组为1.2螺距共40例。采用单因素ANOVA检验,比较3组间的性别、年龄、身高、体重、扫描总时长;3组间的颈动脉分叉处以及同层的颈静脉、胸锁乳突肌的CT值、SD值、SNR、CNR;3组间的图像质量主观评分;设备自动生成的TDLP以及计算得出的ED。采用Kappa检验法,检验两名医师主观评分的一致性。结果:3组间性别、年龄、身高、体重无统计学差异,机器自动生成TDLP以及计算得出的ED无统计学差异;3组间颈动脉分叉处CT值、同层胸锁乳突肌CT值无统计学差异,3组间的颈动脉分叉处SD、SNR、CNR及同层胸锁乳突肌SD值有统计学差异,3组间的同层颈静脉CT值、扫描总时长有统计学差异;3组间的颈动脉评分无统计学差异,3组间的修正评分有统计学差异。结论:基于自动管电流调制技术前提下,可有效减少辐射剂量,即使采用不同螺距也不会增加或减少辐射剂量,但是随着螺距的增大,扫描时间更短,可有效减少静脉对图像质量的干扰、减少运动伪影,从而提升颈部CTA的图像质量。

     

    Abstract: Objective: To study the effect of different tube pitches on neck CTA radiation dose and image quality under automatic tube current modulation technology. Data and methods: A total of 120 patients were selected for neck CTA examination in Tinglin Hospital of Jinshan District, Shanghai from September 2022 to May 2023, including 52 males and 68 females, aged 45~86 years, with an average age of 66.76 years. According to different pitches, patients were assigned to three groups: A, B and C, with a total of 40 cases of 0.8 pitch in group A, 40 cases with 1.0 pitch in group B, and 40 cases with 1.2 pitch in group C. Univariate ANOVA test was used to compare gender, age, height, weight, and total scan duration between the three groups. CT value, SD value, SNR, CNR of the carotid artery bifurcation between the three groups and the jugular vein and sternocleidomastoid muscle in the same layer; Subjective scoring of image quality between the three groups; TDLP automatically generated by the device and calculated ED. Kappa test was used to test the consistency of subjective scores of the two physicians. Results: There were no significant differences in gender, age, height and weight between the three groups, and there was no significant difference in automatic TDLP and calculated ED. There were no significant differences in CT values at the carotid bifurcation and CT values of the same layer of sternocleidomastoid muscle, SD, SCR, CNR and SD values of the carotid artery bifurcation between the three groups, and the modified score between the three groups. Conclusion: Based on the premise of automatic tube current modulation technology, radiation dose can be effectively reduced. Even if different pitches are used, radiation dose will not increase or decrease. However, as the pitch increases, the scanning time is shorter, which can effectively reduce the interference of veins on image quality, reduce motion artifacts, and improve the image quality of neck CTA.

     

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