| LI Qiang,QIAN Nong,LI Sheng,TONG Hong-zhang,XU Lie-fu,WANG Jian-hua.The application of dual-source CT in coronary angiography combined with right ventricular function analysis[J].Chinese Journal of Radiological Medicine and Protection,2013,33(4):438-441 |
| The application of dual-source CT in coronary angiography combined with right ventricular function analysis |
| Received:December 03, 2012 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.04.030 |
| KeyWords:DSCT Prospective ECG trigger Coronary angiography Right ventricular function Radiation dose |
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| Abstract:: |
| Objective To explore the accuracy and radiation dose of the right ventricular analysis with DSCT(dual-source computed tomography)using dual-step prospective ECG trigger. Methods Forty-eight consecutive patients who were suspected or diagnosed with coronary artery disease were examined with DSCT coronary angiography and MRI ventricular analysis. Sequential acquisition and dual-step prospective ECG-trigger were used with 30%-90% width R-R interval. Full tube current output was adopted at 70% (HR≤70 bpm )or 40%(HR> 70 bpm) R-R interval according to heart rates,while 20% current output was adopted in other R-R interval. Coronary artery was divided into 16 segments according to the American Heart Association.Image quality of coronary arteries were graded with 4-points scale. The DSCT date was reconstructed with 5% R-R interval. RVESV, RVEDV and RVEF were evaluated in DSCT and MRI. Results Forty-two cases accomplished DSCT and MRI examination. In 558 evaluated coronary segments, 96.42% could be diagnosed. The average radiation dose was(2.82±0.55)mSv. Paired t-test indicated that the RVESV, RVEDV and RVEF of DSCT and MRI had no statistically significant differences(t=-0.28, 0.44 and 1.49,P>0.05), and the correlation was high (r=0.89, 0.89, 0.87). Conclusions The two generation DSCT with dual-step prospective ECG-triggered sequential acquisition can be used in coronary angiography and right ventricular function analysis simultaneously,which is high in imaging quality of coronary artery, reliable in right ventricular function analysis,as well as lower in radiation dose. |
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