宽探测器CT 70kV管电压联合前瞻心电门控技术诊断婴幼儿先天性心脏病

发布时间：2018-08-06 08:47

【摘要】：目的探讨新型宽探测器CT联合70kV低管电压、前瞻心电门控技术对婴幼儿先天性心脏病诊断的临床应用价值。方法采用Revolution CT联合70kV低管电压前瞻心电门控扫描技术对临床拟诊为复杂性先天性心脏病的婴幼儿45例进行心脏CTA检查,对图像质量进行评分。以手术结果为金标准,比较心脏CTA和心脏超声的诊断效能。记录并计算患儿接受的有效辐射剂量及碘对比剂用量。结果 45例患儿共25种独立的心血管畸形,包括6种心内结构异常和19种心外大血管畸形。对于先天性心外大血管畸形,心脏CTA的诊断准确率和检出率[99.77%(853/855),97.73%(86/88)]均高于心脏超声[98.71%(844/855),88.64%(78/88);χ~2=6.28、5.72,P均0.05)]。有效辐射剂量为(0.20±0.05)mSv,碘对比剂用量为(2.06±1.09)g。45例患儿的图像质量均满足影像诊断要求。结论新型宽探测器CT联合70kV管电压和前瞻性心电门控技术在降低辐射剂量和碘对比剂用量的同时,能获得良好的图像质量和诊断效能,对诊断婴幼儿复杂性先天性心脏病具有重要的临床价值。
[Abstract]:Objective to evaluate the clinical value of new wide detector CT combined with 70kV low tube voltage and prospective ECG gating in the diagnosis of congenital heart disease in infants. Methods 45 infants with complex congenital heart disease were examined by Revolution CT combined with 70kV low tube voltage prospective ECG gated scan. The image quality was evaluated. The diagnostic efficacy of cardiac CTA and echocardiography was compared with the gold standard. The effective radiation dose and iodine contrast dosage were recorded and calculated. Results there were 25 kinds of independent cardiovascular malformations in 45 children, including 6 kinds of intracardiac structural abnormalities and 19 kinds of extracardiac macrovascular malformations. The diagnostic accuracy and detection rate of cardiac CTA [99.77% (853 / 855) and 97.73% (86 / 88)] were higher than that of echocardiography [98.71% (844 / 855) and 88.64% (78 / 88); The effective radiation dose was (0.20 卤0.05) mSv and the dosage of iodine contrast agent was (2.06 卤1.09) g 路45. Conclusion the new wide detector CT combined with 70kV tube voltage and prospective ECG gating technique can achieve good image quality and diagnostic efficacy while reducing radiation dose and iodine contrast agent dosage. It has important clinical value in the diagnosis of complex congenital heart disease in infants.
【作者单位】：福建医科大学附属协和医院影像科;
【分类号】：R816.92;R725.4

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