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Progress in Modern Biomedicine. 2014, (07)

The Image Quality and its Influence Factor of High-Pitch Dual-Source Coronary Angiography Using Flash Spiral Mode in Senile PeopleChinese Full Text

YANG Zhi-ying;LV Chang-xing;CHEN Wen;ZHANG Yi-ning;FAN Yu;Department of Radiation Oncology,Affiliated Chest Hospital of Shanghai Jiaotong University;Department of Radiologists,Affiliated Chest hospital of Shanghai Jiaotong University;Department of Radiologists,Ninth People’s Hospital of Shanghai;

Abstract: Objective: To explore the image quality of high-pitch coronary angiography by flash spiral mode and to analyze the influence factors for the senile patients. Methods: One hundred and eighty-six senile patients with suspected coronary artery disease who were undergoing coronary angiography in our hospital from January 2010 to December 2012 were prospectively selected in this study and were divided into two groups by the rate and rhythm of the heart. Group A（98 cases） were performed the coronary angiography by flash spiral mode, while group B（88 cases） were conducted by spiral acquisition mode to acquire data. Then the general characteristics, image quality scores and effective radiation dose of patients in the two groups were assessed, and effects of heart rate variability on image quality were analyzed statistically. Results: There were no significant differences about the age, gender, body mass index（BMI） and calcium scores between two groups（all P＞0.05）; the heart rates and heart rate variability of groups A were significantly lower than that of the group B（P＜0.05, respectively）; there were no significant differences about the image quality scores, the image noise, contrast-to-noise ratio（CNR） between two groups（all P＞0.05）; there were no significant differences about the non-diagnostic coronary artery segments between two groups（segment-based analysis 1.98% vs 2.21%, patients-based analysis 8.16% vs 6.82%, all P＞0.05）; the scan time, volume CT dose index（CTDIvol）, dose length product（DLP） and effective dose（ED） of groups A were significantly lower than those of the group B（all P＜0.05）; the coronary artery image quality in patients with heart rate variability ＞ 10 times/min were significantly lower than that heart rate variability 5 10 times/min and 5 times/min or less（P＜0.05）. Conclusion: The image quality of high-pitch coronary angiography detected by the flash spiral mode is similar with spiral acquisition mode, while being associated with significant reduction of radiation exposure in senile patients. The heart rate variability is a considerable factor which affects the image quality of high-pitch dual-source coronary computed tomography angiography in senile patients.
Keywords：

Coronary artery disease; Heart rate variability; Tomography; Coronary angiography;

  • DOI：

    10.13241/j.cnki.pmb.2014.07.017

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  • Subject：

  • Classification Code：

    R541.4;R814.42

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