小儿CT血管造影carekv图像质量评估：有效剂量减少50%以上的可行性研究

IF 1.7 4区综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES

Journal of Radiation Research and Applied Sciences Pub Date : 2025-03-01 DOI:10.1016/j.jrras.2025.101386

Chunmei Fan , Runtong Lu , Dilisaer Naisula , Fei Bi , Xin Liu , Shui Wang , Jihang Sun

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引用次数: 0

摘要

目的评价应用CARE kV自动管电压调制技术能否在保持图像质量的前提下，快速、方便、有效地降低儿童CT血管造影（CTA）所需辐射剂量。方法将57例小儿腹部CTA分为研究组和对照组。管电压采用CARE kV自动调制。实验组和对照组的剂量节约优化指标分别为12项（低管电压优先）和3项（高管电压优先）。记录两组的管电压和有效剂量（ED），采用多元线性回归分析影响电压选择和辐射剂量的因素。两名评论者使用5分李克特量表主观评价图像质量(3分：合格；5分：最佳)，计算噪声对比比（CNR）。结果研究组和对照组最常选择的管电压分别为70 kV（36/57, 63.16%）和100 kV (30/57, 52.63%) (p <；0.001)。研究组ED为1.58±1.05 mSv，较对照组降低57.07% (p <；0.001)。电压选择和ED均与DI值呈负相关。两组小动脉显示能力分别为4.05±0.64和4.11±0.65 （p = 0.31）。两组患者主动脉CNR差异无统计学意义（p = 0.15）。结论carekv是一种快速、方便、有效的方法，可使儿童CTA放射剂量降低50%。

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Image quality assessment of the CARE kV for pediatric CT angiography: A feasibility study of over 50% effective dose reduction

Objective

To evaluate whether the application of CARE kV automatic tube voltage modulation technology can reduce the radiation dose required for CT angiography (CTA) in children rapidly, conveniently, and effectively while maintaining image quality.

Methods

57 pediatric abdominal CTA were enrolled in the study and control groups. The tube voltage was automatically modulated using CARE kV. Dose-saving optimization indices used for the study and control groups were 12 (preference for a lower tube voltage) and 3 (preference for a higher tube voltage), respectively. Tube voltage and effective dose (ED) were recorded for the two groups, and a multiple linear regression analysis was used to scrutinize factors influencing voltage selection and radiation dose. Two reviewers subjectively evaluated the image quality using a 5-point Likert scale (3 points: qualified; 5 points: best), and the contrast-to-noise ratio (CNR) was calculated.

Results

The most commonly selected tube voltage was 70 kV (36/57, 63.16%) and 100 kV (30/57, 52.63%) in the study and control groups, respectively (p < 0.001). The ED of the study group was 1.58 ± 1.05 mSv, which was 57.07% lower than that in the control group (p < 0.001). Both voltage selection and ED exhibited a negative correlation with the DI value. The small artery display ability of the two groups was 4.05 ± 0.64 and 4.11 ± 0.65 (p = 0.31). No statistically significant difference was found for the aortic CNR between the two groups (p = 0.15).

Conclusion

CARE kV is a rapid, convenient, and effective way to reduce the radiation dose in CTA by >50% in children.

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来源期刊

Journal of Radiation Research and Applied Sciences MULTIDISCIPLINARY SCIENCES-

自引率

5.90%

发文量

130

审稿时长

16 weeks

期刊介绍： Journal of Radiation Research and Applied Sciences provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and applications of nuclear, radiation and isotopes in biology, medicine, drugs, biochemistry, microbiology, agriculture, entomology, food technology, chemistry, physics, solid states, engineering, environmental and applied sciences.