双源CT与传统CTA-DSA技术在头颈部血管成像的对比应用

摘要

Objective To explore the application value of dazzle speed dual-source dual-energy CT imaging in head and neck arteries. Methods Total 96 patients were enrolled into two groups randomly in this study. Fourty-eight pa tients were scanned the dual-energy scanning mode (140 kV/Sn80 kV,210/105 mAs) in group A. The other 48 patients were scanned in a tranditional Neuro-DSA mode (120 kV/245 mAs) in group B. The CT volume dose index (CTDI vol) and the subjective image quality score were compared between two groups. Results The difference of the subjective im age quality score was significant between the two groups(P<0.05), the effective dose of group A was decreased by 25%compared with the dose of group B [(7.54±0.05) mGy vs (10.67±0.08) mGy). Conclusion Radiation dose is lower, image quality is better in the dazzle speed dual-source double energy imaging of the head and neck vascular when compared to the conventional Neuro-DSA imaging. But excessive?subtraction angiography exists in the bone of the skull base, the technology needs to be improved.%目的：探讨炫速双源CT双能量成像在头颈部动脉血管中应用的价值。方法96例患者随机分成两组：A组炫速双源组(n=48)，使用炫速双源行头颈部CTA双能量检查，扫描参数140 kV/Sn80 kV，210/105 mAs；月组传统Neuro-DSA组(n=48)，使用炫速双源内的传统Neuro-DSA常规扫描方法，参数120 kV/245 mAs；同时比较两组检查的悦栽容积剂量指数(CTDI vol)以及进行图像质量主观评分。结果两组间影像质量的主观评估差异有统计学意义(P<0.05)，两组间辐射剂量差异有统计学意义(P<0.05)，A组有效剂量为(7.54±0.05)mGy，较B组的(10.67±0.08)mGy降低<25豫。结论头颈部血管炫速双源双能量成像与传统Neuro-DSA成像对比双能成像辐射小，成像质量效果好，但颅底骨存在过度减影的缺点，技术亟需改进。