能谱CT血管成像显示甲状腺供血动脉

目的 探讨能谱CT血管成像技术对甲状腺供血动脉的显示能力以及优化血管成像质量的价值。方法 回顾性分析100例头颈CTA的能谱原始数据，运用能谱单能量成像技术分别重建60 keV、75 keV单能量图像，结合VR、MIP后处理图像以及原始图像观察甲状腺供血动脉的解剖特征，并对2组图像进行客观评价和主观评分。结果 100例共显示200支（左右侧各100支）甲状腺上动脉，165支甲状腺下动脉（左侧76支，右侧89支）和3支甲状腺最下动脉。60 keV单能量图像质量优于75 keV单能量图像，两者CT值、SNR和主观评分差异均有统计学意义（P均<0.05）。结论 能谱CT血管成像可清晰显示甲状腺供血动脉，推荐使用60 keV单能量图像。

Dual-energy CT angiography in displaying thyroid feeding artery

Objective To explore the ability of dual-energy CT angiography for displaying thyroid feeding arteries and its value in quality optimization. Methods Energy spectrum data of 100 patients who underwent head and neck CTA were analyzed retrospectively. The energy spectrum single energy imaging technique was used to reconstruct 60 keV and 75 keV single energy images. Combining with VR and MIP post-processing images, the anatomical features of the thyroid feeding arteries were observed. The quality of 60 keV and 75 keV single energy images were evaluated objectively and subjectively. Results A total of 200 superior thyroid arteries (100 left and 100 right), as well as 165 inferior thyroid arteries (76 left and 89 right) and 3 lower thyroid arteries were displayed. The quality of 60 keV single energy images was better than that of 75 keV single-energy images, and the differences of CT value, SNR and subjective scores were all statistically significant (all P<0.05). Conclusion Dual-energy CT angiography can clearly display thyroid feeding arteries. 60 keV single energy image is recommended.