Low-tube voltage scanning combined with reducing contrast agent dosage in pulmonary vein and left atrial angiography

doi:10.3877/cma.j.issn.2095-2015.2023.02.006

Abstract

Abstract:

Objective

To explore the application of reducing the dose of contrast agent under low radiation dose scanning in pulmonary vein and left atrium angiography.

Methods

A total of 80 patients with left atrium and pulmonary vein angiography in the 960th Hospital of the PLA were selected and divided into control group(tube voltage 120 kV, contrast agent 70 ml)and experimental group(tube voltage 80 kV, contrast agent 40 ml). The image quality of the two groups was evaluated by subjective evaluation and objective evaluation.

Results

Subjective evaluation: The image quality of both groups met the diagnostic requirements.There was no statistically significant difference.Objective evaluation: There were statistically significant differences in the CT values, signal noise ratio, computed tomography dose index, dose-length product, effective dose measured by the scanning scheme between the control group and the experimental group.

Conclusion

Low-tube voltage scanning combined with low-dose angiography can not only ensure image diagnosis but also effectively reduce the dose of contrast agent and radiation in the examination of pulmonary vein and left atrium.

Key words: Atrial fibrillation, Radiation dose, Contrast agent, Angiographic CT

Qinglei Wang, Wei Li, Huiwen Dong, Hailing Liu, Bo Wang, Xiangling Meng, Yabin Feng. Low-tube voltage scanning combined with reducing contrast agent dosage in pulmonary vein and left atrial angiography[J]. Chinese Journal of Digestion and Medical Imageology(Electronic Edition), 2023, 13(02): 89-92.

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URL: https://zhxhbyyxzz.cma-cmc.com.cn/EN/10.3877/cma.j.issn.2095-2015.2023.02.006

https://zhxhbyyxzz.cma-cmc.com.cn/EN/Y2023/V13/I02/89

Figures/Tables 3

References 22

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组别	例数	CT值
组别	例数	右上肺静脉	右下肺静脉	左上肺静脉	左下肺静脉	左心房
试验组	40	580.88±83.17	562.06±55.86	612.68±88.98	608.03±65.51	564.83±62.55
对照组	40	510.03±93.84	472.07±89.83	535.91±95.57	518.43±89.06	495.02±84.62
t值		2.114	3.183	1.845	3.032	2.482
P		0.044	0.004	0.008	0.005	0.019
组别	例数	信噪比
组别	例数	右上肺静脉	右下肺静脉	左上肺静脉	左下肺静脉	左心房
试验组	40	13.17±4.85	10.4±2.20	13.54±4.72	12.48±3.86	12.55±5.37
对照组	40	16.95±3.47	14.33±3.58	18.5±5.41	17.49±6.06	18.44±4.48
t值		－2.374	－3.496	－2.581	－2.608	－3.154
P		0.025	0.002	0.015	0.014	0.004

组别	例数	CT值
组别	例数	右上肺静脉	右下肺静脉	左上肺静脉	左下肺静脉	左心房
试验组	40	580.88±83.17	562.06±55.86	612.68±88.98	608.03±65.51	564.83±62.55
对照组	40	510.03±93.84	472.07±89.83	535.91±95.57	518.43±89.06	495.02±84.62
t值		2.114	3.183	1.845	3.032	2.482
P		0.044	0.004	0.008	0.005	0.019
组别	例数	信噪比
组别	例数	右上肺静脉	右下肺静脉	左上肺静脉	左下肺静脉	左心房
试验组	40	13.17±4.85	10.4±2.20	13.54±4.72	12.48±3.86	12.55±5.37
对照组	40	16.95±3.47	14.33±3.58	18.5±5.41	17.49±6.06	18.44±4.48
t值		－2.374	－3.496	－2.581	－2.608	－3.154
P		0.025	0.002	0.015	0.014	0.004

组别	例数	CTDI	DLP	ED
试验组	40	15.66±6.992	249.71±111.621	4.21±1.891
对照组	40	60.31±17.236	943.85±288.565	16.04±4.906
t值		－8.983	－8.394	－8.419
P		0.000	0.000	0.000

组别	例数	CTDI	DLP	ED
试验组	40	15.66±6.992	249.71±111.621	4.21±1.891
对照组	40	60.31±17.236	943.85±288.565	16.04±4.906
t值		－8.983	－8.394	－8.419
P		0.000	0.000	0.000

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