title: [Comparison of prospectively electrocardiographic triggered spiral and sequential acquisition for coronary computed tomographic angiography using dual-source computed tomography].
abstract: OBJECTIVE
  To compare the image quality and radiation dose of prospectively electrocardiogram (ECG) -triggered spiral and sequential acquisition for coronary computed tomographic angiography by dual-source computed tomography.
  
  
  METHODS
  Sixty patients with suspected or known coronary artery disease were randomly divided into two groups. Group A underwent prospective ECG-triggering spiral scan and Group B underwent prospective ECG-triggering sequential scan. Both the image quality and radiation dose of the two groups were compared.
  
  
  RESULTS
  There was no significant difference in age and body mass index of the two groups. The average image quality score was 1.12 ± 0.38 in group A and 1.14 ± 0.38 in group B (Z=-0.291,P=0.771) . The rates of diagnostic coronary segments for two groups were 98.87% and 99.56% respectively (X2=0.59,P=0.443) . The mean radiation dose of group A was significantly lower than that of group B [ (1.31 ± 0.30) mSv vs. (3.36 ± 0.93) mSv; t=11.47, P=0.000] .
  
  
  CONCLUSIONS
  Compared with the prospective ECG-triggered sequential acquisition, the prospective ECG - triggered spiral scan for coronary computed tomographic angiography can remarkably reduce radiation dose without impairing image quality in patients with a low and stable heart rate (≤ 70 bpm) .
authors.affiliation: Department of Radiology, PUMC Hospital, Beijing 100730, China.
authors.forename: Luo
authors.initials: L
authors.lastname: Li
authors.forename: Yi-ning
authors.initials: YN
authors.lastname: Wang
authors.forename: Lian-yan
authors.initials: LY
authors.lastname: Kong
authors.forename: Zhi-wei
authors.initials: ZW
authors.lastname: Wang
authors.forename: Kang
authors.initials: K
authors.lastname: Zhou
authors.forename: Jin
authors.initials: J
authors.lastname: Chen
authors.forename: Wen-bin
authors.initials: WB
authors.lastname: Mao
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Zheng-yu
authors.initials: ZY
authors.lastname: Jin
mesh_terms: D000368:Aged; D017023:Coronary Angiography / Q000379:methods*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011829:Radiation Dosage; D036542:Tomography, Spiral Computed / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*