| 陈艳,韩萍,梁波,雷子乔,田志梁,周阳泱.多层螺旋CT冠状动脉成像:重建时相及心率对图像质量的影响[J].中国医学影像技术,2005,21(3):425~429 |
| 多层螺旋CT冠状动脉成像:重建时相及心率对图像质量的影响 |
| Noninvasive visualization of coronary artery using multi-slice CT: influence of reconstruction time and heart rate on image quality |
| 投稿时间：2004-11-02 修订日期：2004-12-22 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 冠状动脉疾病 血管造影术 |
| 英文关键词:Tomography, X-ray computed Coronary disease Angiography |
| 基金项目: |
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| 中文摘要: |
| 目的 探讨重建时相及心率对16层螺旋CT冠状动脉成像的影响,并确定冠状动脉各分支在不同心率组间的最佳时相。方法 93名患者行16层螺旋CT冠状动脉成像,以10％间隔回顾性重建20％~80％时相的图像,根据心率分三组(组Ⅰ:≤60次/分、组Ⅱ:60~70次/分、组Ⅲ:≥70次/分),两名医师评价不同心率、不同时相的图像质量。结果 在组Ⅰ、组Ⅱ、组Ⅲ中的最佳成像时相,左前降支(LAD)分别为50％~70％、60％~70％、60％;左回旋支(LCX)分别为50％~60%、60 |
| 英文摘要: |
| Objective To investigate the influence of reconstruction time and heart rate on image quality of multi-slice CT (MSCT) coronary angiography, and to confirm the optimal reconstruction time in patients of different heart rate. Methods MSCT coronary angiography were performed in 93 patients. Images were reconstructed at 20%-80% of the cardiac cycle in increments of 10%. Patients were classified three groups according to heart rate (groupⅠ:≤60 bpm, groupⅡ:60-70 bpm, group Ⅲ:≥70 bpm), image quality was evaluated by two investigators. Results The best reconstruction time of left anterior descending artery (LAD) were 50％-70％, 60％-70％,60％ respectively from groupⅠto group Ⅲ; that of left circumflex artery (LCX) were 50％-60%,60%,40% respectively; that of right coronary artery (RCA) were 60％, 50％-60％, 40％ respectively. The proximal segments of LM, LAD were not statistically significant in all groups, the mid and distant segments of LAD, all segments of LCX, proximal segments of RCA were not statistically significant between group Ⅰand group Ⅱ, but those are statistically significant compared to group Ⅲ; the mid segments of RCA are statistically significant in any group. Conclusion With multi-reconstruction time, 16-slice CT coronary angiography can achieve good image quality in patients whose heart rates are below 70 beats per minute. |
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