Title: Different scan modes of 2~(nd)-generation dual-source CT for CT coronary angiography
Abstract:Objective To evaluate the application of three scan modes for CT coronary angiography by using 2nd-generation dual source CT. Methods One hundred and sixty six patients underwent CT coronary angiograp...Objective To evaluate the application of three scan modes for CT coronary angiography by using 2nd-generation dual source CT. Methods One hundred and sixty six patients underwent CT coronary angiography with 2nd-generation dual source CT scanner( DSCT: SOMATOM Definition Flash),among them 67 patients( HR 70 bpm with regular rhythm) were examined with flash scan mode,35 patients( HR≥70 bpm with regular rhythm) with sequence scan mode,and 64 patients( irregular rhythm) with conventional spiral mode,respectively. The radiation dose and image quality of three main coronary artery branches of these scan modes were compared. Results The average doses used for flash,sequence and conventional scan modes were( 0. 73 ± 0. 09),( 3. 73 ± 1. 27) and( 9.07 ± 2. 96) mSv,respectively( P 0. 01). There were no significant differences in the image quality of three main branches of coronary arteries among 3 different scan modes( P 0. 05). The image quality was significantly correlated with heart rate( P 0. 01). The variation of heart rate was correlated with the image quality of LAD( P 0. 01),but not correlated with that of LCX and RCA( P 0.05). Conclusion The scan mode of 2nd-generation DSCT image can be chosen according to heart rate and rhythm of patients to achieve satisfactory imaging quality and low radiation dose.Read More
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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