全身动脉双源CT低剂量成像在大动脉炎的临床应用  

The clinical application of low-dose dual-source whole-body angiography CT in Takayasu＇s arteritis

作　　者：邓妍萌 李剑[1] 赵宏亮[1] 郑敏文[1] 

机构地区：[1]第四军医大学西京医院放射科,陕西西安710032

出　　处：《实用放射学杂志》2016年第3期406-410,共5页Journal of Practical Radiology

摘　　要：目的评估大动脉炎（TA）患者的全身动脉血管受累情况。方法连续收集57例可疑TA患者．给予一次性全身动脉双源CT血管造影（CTA）扫描。扫描参数：管电压80kV，参考管电流300mAs，开启自动管电流调控，图像重建采用迭代重建技术。记录每例患者的容积CT剂量指数（CTDIv01）及剂量长度乘积（DLP）。所有病例均分别对头、颈、胸、腹、上肢动脉及下肢大、小腿动脉行主观及客观图像质量评分，同时统计全身各部位动脉血管的受累情况及病变的CT表现。结果经临床和CTA证实TA患者共40例。患者的平均CTDIvol为（2．5±0．9）mGy，平均DLP为（403．7±91.4）mGy·cm。颈、胸、腹和大腿动脉的图像质量计分最高，其次是上肢动脉，头部及小腿动脉图像质量最低且分值接近。额外检出的颅内动脉、下肢动脉及上肢动脉受累比例分别为5．9％、3．3％、0．5％，共38支（9．7％）。结论颅内及四肢动脉的额外检出为TA的全身受累情况提供了更为全面的评估。Objective To evaluate the low-dose dual-source whole-body CT angiography in assessing the arteries of Takayasu＇s arteritis {TA）. Methods Low-dose whole-body CT angiography（CTA}was performed in 57 consecutive patients with suspected TA. The scanning parameters were performed with tube voltage 80 kV and attenuation-based tube current modulation with a referenced tube current at 300 mAs. The volume CT dose index （CTDIvol） and dose-length product （DLP]were obtained for all scans. Subiectire and objective image quality of different arteries were assessed in seven anatomic territories,including intracranial, cervical, tho- racic,abdominal,upper extremity, thigh and shank. In addition,CT findings o{ whole-body arteries were recorded. ResuLts Forty out of fifty-seven patients with definite diagnosis of TA enrolled in this study. Mean CTDIvol and DLP for all patients were （2.5±0.9） mGy and （403.7±91.4） mGy·cm,respectively. The scoring order of subjective and objective iamge quality was neck,chest, abdomen, thigh, upper extremity, head and shank. 5.9 % of intracranial arteries, 3.3 % of lower extremity arteries and 0.5 % of upper extremity arteries were extra detected. Conclusion The extra CT findings of intracranial, lower extremity and upper extremity arteries provides a more comprehensive evaluation of whole-body arteries involvement.

关 键 词：大动脉炎 计算机体层成像 血管造影术 低剂量 

分 类 号：R543.5[医药卫生—心血管疾病] R814.42[医药卫生—内科学]