256排多层螺旋CT行头颈血管联合主动脉“一站式”扫描

One-stop scanning of head and neck arteries and the aorta using 256-slice spiral CT

摘要:

目的：探讨头颈部血管联合主动脉一站式扫描的可行性。方法：回顾性分析临床检查头颈血管和胸腹血管患者40例，根据检查方法分为A、B两组，A组进行CT头颈血管和胸腹部血管的一站式扫描；B组分别行头颈血管CT扫描和胸腹部血管CT扫描。对两组图像进行主观评分和客观统计分析。结果：A组与B组CT血管图像均能满足诊断要求。A、B 2组血管的CT值差异均无统计学意义（P>0.05）；主动脉弓、腹主动脉以及髂总动脉的CNR及SD差异均无统计学意义（P>0.05）；大脑中动脉、椎动脉及颈总动脉CNR和SD差异有统计学意义（P<0.05），B组CNR均高于A组，B组SD均低于A组；2组主动脉弓、腹主动脉及髂总动脉SD差异均无统计学意义（P>0.05）；A组[（104.70±10.62） mL]对比剂使用剂量和B组[（146.10±12.48） mL]对比剂使用剂量差异有统计学意义（t=-11.297，P=0.000）。 结论：头颈血管联合胸腹部血管扫描图像能够满足诊断的需求，减少患者检查次数和对比剂的使用量，优化检查流程。

Abstract:

Objective：To investigate the feasibility of one-stop scanning of head and neck arteries and the aorta. Methods：A retro－spective analysis was performed for 40 patients who underwent head and neck computed tomography（CT） angiography（CTA） and thoracic and abdominal CTA. These patients were divided into group A and group B according to the scanning method. Group A underwent one-stop scanning of head and neck arteries and the thoracic and abdominal aorta，while group B underwent head and neck CTA and thoracic and abdominal CTA separately. Subjective scoring and objective statistical analysis were performed on the images obtained in the two groups. Results：CTA images of both groups met the diagnostic requirements. There was no significant difference in CT value between the two groups（P>0.05）. No significant differences were observed between the two groups in contrast-to-noise ratio（CNR） or standard deviation（SD） of the aortic arch，the abdominal aorta，and the common iliac artery（P>0.05）. Compared with group A，group B had significantly higher CNR of the middle cerebral artery，the vertebral artery，and the common carotid artery and significantly lower SD of these arteries（P<0.05）. There was no significant difference in SD of the aortic arch，the abdominal aorta，and the common iliac artery between the two groups（P>0.05）. Group A had a significantly lower dose of contrast agent than group B（104.70±10.62） mL vs. （146.10±12.48） mL，t=-11.297，P<0.001]. Conclusion：Head and neck CTA combined with thoracic and abdominal CTA can meet the needs for diagnosis，reduce examination times and the dose of contrast agent，and optimize the examination process.