摘要
目的:探讨16层螺旋CT冠状动脉成像质量的影响因素。方法:82例患者行16层螺旋CT冠状动脉造影检查,评价不同心率、心动周期内不同R-R时相重建图像、不同注射方式的冠脉成像质量。结果:心率<65次/min的55例患者中,有45例(81.8%)冠脉成像质量较优;心率≥65次/min的27例中仅10例(37%)冠脉重建图像较满意。两者间有明显的统计学显著性差异(P<0.001)。63例(76.8%)于心动周期的60%R-R间期重建图像质量最佳,仅10例(12.2%)于50%的R-R间期、9例(11%)于70%的R-R间期显示较佳。60%R-R间期分别与50%的R-R间期及70%的R-R间期重建图像间均有统计学显著性差异(P<0.001)。双相注射成像效果明显优于单相注射。结论:检查前控制好患者心率(<65次/min)、选择最佳的重建时相窗(60%R-R间期)、双相注射对比剂等有利于提高冠脉的成像质量。
Objective： To discuss the factors affecting imaging quality of coronary angiography with 16-slice spiral CT（MSCTCA）. Methods：82 patients were studied with MSCTCA. It was evaluated on coronary artery imaging quality of different heart rates,different R- R phases in cardiac cycle and different contrast injection modes . Results ： 45 cases （81.8%） of 55 with heart rates 〈 65 bpm had good imaging quality. Only 10 cases （37%） of 27 with heart rates ≥ 65 bpm were satisfactory for imaging quality. There was statistically significant difference between the both （ P 〈 0.001 ）. It was the best coronary artery reconstruction quality for 63 cases （76.8%） in 60% R-R phase, only 10 cases （12.2%）in 50% R-R phase, 9 cases （ 11% ） in 70% R-R phase. There were statistically significant differences between that of 60% R-R phase and 50% R-R phase or 70% R-R phase （ P 〈0.001）. Dual-phase injection mode pnx]uced better imaging effects than single-phase mode. Conclusion：It is in favor of improving MSCTCA imaging quality to control patients heart rates （ 〈 65 bpm） before exam,to choose the best reconstruction phase （60% R-R phase） and dual-phase injection mode.
出处
《医学影像学杂志》
2008年第6期611-614,共4页
Journal of Medical Imaging
