Head and Neck Imaging
Study of Radiation Dosage Reduction with Prospective ECG-gated 64-row CT Coronary Angiography
Author：WU Jing-jing, PU Fu-shun, LUO Jia-bin,et al.
affiliation：Department of Radiology,The first people hospital of Hong He Sate, Mengzi 661199 China
PDFAbstract
Objective To explore the role of prospective ECG-gated coronary angiography in reducing radiation dose by comparing image quality and radiation dose of prospective and retrospective ECG-gated 64-row CT coronary angiography. Materials and Methods 157 patients suspected coronary artery disease were divided in two groups. 85 patients were taken prospective ECG gating axial scan and 72 were taken retrospective ECG gating helical scan.The heart rate was ﹤65bmp.Coronary artery segments were assessed for imaging quality and radiation dose values were calculated. Results Effective radiation dose of prospective ECG gating group (4.42±1.52mSv) was significantly lower than that of retrospective ECG gating group (14.84±3.98mSv)(P<0. 01). There was no significant difference in image quality between two groups(P﹥0.05),and image excellent rates of prospective ECG gating group was higher than that of retrospective ECG gating group. Conclusion Prospective ECG gating axial scan effectively reduces the radiation dose and receives similar image quality compared with retrospective ECG gating coronary angiography in patients with heart rates ﹤65bpm.
【Keyword】Tomography,X-ray Computed; ECG-gating; Radiation Dose
【Chart number】R543.3; R445.3
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672-5131.2015.02.11
Chinese journal of CT and MRI
th13Volume， th 2 Issue
2015Year02Month
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