Effect of heart rate on coronary artery imaging quality of 64-slice Spiral CT

doi:10.3877/cma.j.issn.2095-6568.2018.04.013

Abstract

Abstract:

Objective

To analyze the effect of heart rate on imaging quality of 64-slice coronary CT angiography (CCTA).

Methods

A total of 126 patients who underwent CCTA examination in Kaifeng Central Hospital from September 2016 to June 2018 were selected. According to the highest heart rate recorded synchronously during scanning, the patients were divided into <65 beats/min group (82 cases), 66-70 beats/min group (25 cases) and >70 beats/min group (19 cases). The evaluation rates of three groups of images were compared, and the evaluation rates of initial images and reconstructed images were compared.

Results

The rate of image evaluation in <65 beats/min group (98.78%) was higher than that in <70 beats/min group (57.89%) (P<0.05). The rate of image evaluation in 66-70 beats/min group (92.00%) was higher than that in >70 beats/min group (57.89%) (P<0.05). The rate of image evaluation after reconstruction was 93.65% higher than that of original image after R wave (83.33%) (P<0.05).

Conclusion

The image evaluation rate is higher when heart rate is lower than 70 beats/min, and image quality is significantly affected when heart rate is higher than 70 beats/min. At this time, the application of ECG editing, multi-temporal reconstruction and multi-point reconstruction technology can improve the image quality of CCTA.

Key words: Imaging quality, Heart rate, 64-Slice spiral CT

Chaoxin Zhang, Weijun Qian, Li Li, Wen Zhao, Yuying Fang, Wei Guo. Effect of heart rate on coronary artery imaging quality of 64-slice Spiral CT[J]. Chinese Journal of Heart and Heart Rhythm(Electronic Edition), 2018, 06(04): 234-236.

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URL: https://zhxzyxldzzz.cma-cmc.com.cn/EN/10.3877/cma.j.issn.2095-6568.2018.04.013

https://zhxzyxldzzz.cma-cmc.com.cn/EN/Y2018/V06/I04/234

组别	例数	可评价图像	不可评价图像
≤65次/min组	82	81(98.78)	1(1.22)
66～70次/min组	25	23(92.00)	2(8.00)
>70次/min组	19	11(57.89)	8(42.11)
χ²值	?	32.383
P值	?	<0.001

组别	例数	可评价图像	不可评价图像
≤65次/min组	82	81(98.78)	1(1.22)
66～70次/min组	25	23(92.00)	2(8.00)
>70次/min组	19	11(57.89)	8(42.11)
χ²值	?	32.383
P值	?	<0.001

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