现代仪器与医疗

三低方案在左心房CT血管成像中应用的可行性分析

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杨雯 , 胡永志 , 王彬彬 , 曹达 ^*

现代仪器与医疗 | 临床研究 2025,31(3): 56-60

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现代仪器与医疗 |临床研究 2025 , 31 (3) : 56 -60

三低方案在左心房CT血管成像中应用的可行性分析

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杨雯, 胡永志, 王彬彬, 曹达^*

作者信息

南京医科大学第一附属医院放射科，南京　210019

通讯作者:

曹达，男，硕士研究生，主管技师，研究方向：医学图像处理与医学图像合成

作者简介:

杨雯，女，本科，技师，研究方向：医学图像处理

Application value of the triple-low protocol in left atrial CT angiography

Wen Yang, Yongzhi Hu, Binbin Wang, Da Cao^*

Affiliations

Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210019, China

出版时间: 2025-06-10 doi: 10.11876/mimt202503010

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摘要

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目的

探讨“三低”（低管电压、低对比剂剂量、低对比剂注射速率）方案在左心房CT血管成像（computed tomography angiography，CTA）中的应用效果，评估“三低”方案在保证影像质量的同时降低辐射剂量和对比剂用量的可行性及价值。

方法

前瞻性纳入2024年6月—12月在南京医科大学第一附属医院行左心房CTA检查的60例患者，随机分为常规方案组（30例）和“三低”方案组（30例）。常规组采用管电压120 kV、对比剂用量0.9 mL/kg、注射流速5.0 mL/s及滤波反投影（filtered back projection，FBP）算法；“三低”组采用管电压100 kV、对比剂用量0.7 mL/kg、注射流速4.0 mL/s及混合迭代重建（hybrid iterative reconstruction，HIR）算法。对比两组图像质量主观评分、信号噪声比（signal-to-noise ratio，SNR）、对比噪声比（contrast-to-noise ratio，CNR）、有效剂量（effective dose，ED）及碘摄入量。

结果

两组图像质量主观评分均符合诊断标准，组间比较差异无统计学意义（P>0.05）。“三低”组左心房平均CT值显著高于常规组（P<0.01），但两组的SNR与CNR比较，差异无统计学意义（P>0.05）。“三低”组碘摄入量及有效辐射剂量均显著低于常规组（P<0.01）。

结论

“三低”方案在左心房CTA中可显著降低辐射剂量和对比剂用量，同时保证影像质量，为患者提供更优的影像学检查方案，具有一定的临床应用价值。

关键词

“三低”方案 / 左心房CT血管成像 / 辐射剂量 / 对比剂用量 / 图像质量 / 迭代重建算法

Abstract

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Objective

To investigate the application effect of the “triple-low” protocol (low tube voltage, low contrast agent dose, and low injection rate) in left atrial computed tomography angiography (CTA) and evaluate its feasibility and value in reducing radiation dose and contrast agent usage while ensuring image quality.

Methods

Sixty patients who underwent left atrial CTA examinations at the Radiology Department of the First Affiliated Hospital of Nanjing Medical University from June 2024 to December 2024 were prospectively enrolled and randomly divided into a conventional protocol group (n=30) and a “triple-low” protocol group (n=30). The conventional group used 120 kV tube voltage, 0.9 mL/kg contrast agent dose, 5.0 mL/s injection rate, and filtered back projection (FBP) algorithm. The “triple-low” group used 100 kV tube voltage, 0.7 mL/kg contrast agent dose, 4.0 mL/s injection rate, and hybrid iterative reconstruction (HIR) algorithm. Subjective image scores, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), effective radiation dose (ED), and iodine intake were compared between the two groups.

Results

Both groups met diagnostic standards for subjective image quality, with no significant intergroup differences (P>0.05). The “triple-low” group showed significantly higher mean CT values in the left atrium compared to the conventional group (P<0.01), but there were no significant differences in SNR and CNR (P>0.05). The “triple-low” group exhibited significantly lower iodine intake and effective radiation dose than the conventional group (P<0.01).

Conclusion

The “triple-low” protocol significantly reduces radiation dose and contrast agent usage in left atrial CTA while maintaining image quality, offering a superior imaging solution for patients and demonstrating promising clinical value.

Key words

Triple-low protocol / Left atrial computed tomography angiography / Radiation dose / Contrast agent usage / Image quality / Iterative reconstruction algorithm

引用本文

杨雯, 胡永志, 王彬彬, 曹达. 三低方案在左心房CT血管成像中应用的可行性分析. 现代仪器与医疗, 2025 , 31 (3) : 56 -60 . DOI: 10.11876/mimt202503010

Wen Yang, Yongzhi Hu, Binbin Wang, Da Cao. Application value of the triple-low protocol in left atrial CT angiography[J]. Modern Instruments & Medical Treatment, 2025 , 31 (3) : 56 -60 . DOI: 10.11876/mimt202503010

基金

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南京医科大学常州医学中心重点项目(CMCM202305)

参考文献

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2025年第31卷第3期

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文章信息

doi: 10.11876/mimt202503010

首发时间：2026-10-23
出版时间：2025-06-10

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基金

南京医科大学常州医学中心重点项目(CMCM202305)

作者信息

南京医科大学第一附属医院放射科，南京　210019

通讯作者:

曹达，男，硕士研究生，主管技师，研究方向：医学图像处理与医学图像合成

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科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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