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目的:评价低剂量CT扫查在小儿冠状动脉疾病诊断中的应用价值。方法:收集50例冠状动脉疾病患儿相关资料,均经手术确诊。按照患儿入院顺序随机分为A、B两组,各25例。两组患儿行冠状动脉低剂量CT血管成像,其中A组低管电压设置为70kv,B组低管电压80kv,其余参数皆一致。对比两组冠状动脉疾病的检出情况、动脉直径及长径测量结果、辐射剂量等。结果:A组、B组对冠状动脉-心腔瘘、左冠状动脉起源于肺动脉、冠状动脉起源变异、川崎病冠状动脉损害、冠状动脉肺动脉瘘、单支冠状动脉的检出率相当,并与手术结果基本一致,差异不具有显著性(P>0.05);A组、B组测量患儿冠状动脉血管直径、血管长径差异不具有显著性(P>0.05);B组的CTDlvol、DLP、有效辐射剂量明显高于A组,差异具有统计学意义(P<0.05)。结论:在小儿冠状动脉疾病诊断中,运用70kv低管电压能有效提高确诊率,降低辐射剂量,减轻对患儿的影响,具有重要临床价值。
Objective: To evaluate the value of low-dose CT scan in the diagnosis of coronary artery disease in children. Methods: Fifty children with coronary artery disease were collected and confirmed by surgery. In accordance with the order of admission of children were randomly divided into A, B two groups, each 25 cases. Two groups of children underwent coronary angiography low-dose CT angiography, in which A group of low-voltage set to 70kv, B group of low-voltage 80kv, the remaining parameters are the same. Compare the two groups of coronary artery disease detection, arterial diameter and long diameter measurement results, radiation dose. Results: The detection rates of coronary artery-cardiac fistula, left pulmonary artery originated from pulmonary artery and coronary artery in group A and group B were comparable to those of coronary artery in Kawasaki disease, coronary artery pulmonary fistula and coronary artery. There was no significant difference between the two groups (P> 0.05). There was no significant difference in the diameter of coronary artery and the diameter of vessel in group A and group B (P> 0.05). CTDlvol, DLP, Effective radiation dose was significantly higher than the A group, the difference was statistically significant (P <0.05). Conclusion: The diagnosis of coronary artery disease in children, the use of 70kv low voltage can improve the diagnosis rate, reduce radiation dose, reduce the impact on children with important clinical value.