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目的探讨不同对比剂注射方案对64层螺旋CT冠状动脉血管成像的影响。方法 90例行64层螺旋冠状动脉检查的患者,随机分为A、B、C三组,各30例。A组先注射对比剂,再注射生理盐水;B组先注射对比剂,后将对比剂和生理盐水按3∶7比例注射;C组先注射对比剂,再将对比剂和生理盐水按1∶1比例注射,比较三组冠状动脉CT值。结果三组左主干、左回旋支及右冠状动脉CT值比较差异无统计学意义(P>0.05);A组(465.94±35.28)HU与C组(421.52±28.34)HU、B组(468.29±33.27)HU与C组(421.52±28.34)HU左前降支CT值比较差异均有统计学意义(P<0.05);三组左心室壁显影比较差异有统计学意义(P<0.05)。结论采用对比剂稀释注射方案对64层螺旋CT冠状动脉血管成像效果可产生明显影响,优于传统的双期注射方案。
Objective To investigate the effects of contrast medium injection on 64-slice spiral CT coronary angiography. Methods Totally 90 patients with 64-slice spiral coronary artery were randomly divided into three groups (A, B and C), 30 in each. Group A was injected with contrast agent first, and then with saline; Group B was injected with contrast agent, then contrast agent and saline were injected at a ratio of 3: 7; Group C was injected with contrast agent first, then contrast agent and normal saline 1 ratio injection, comparing the three groups of coronary CT value. Results There was no significant difference in CT value between the left main branch, left circumflex branch and right coronary artery in the three groups (P> 0.05). HU in group A (465.94 ± 35.28) HU was significantly lower than that in group C (421.52 ± 28.34) HU and group B (468.29 ± 33.27). There was significant difference between HU group and 421.52 ± 28.34 HU group in CT value of left anterior descending artery (P <0.05). There was significant difference in LV imaging between the three groups (P <0.05). Conclusion Dilution contrast injection can significantly affect the coronary angiography of 64-slice spiral CT, which is better than the traditional two-phase injection.