摘要
目的探讨双源CT Flash低剂量扫描对儿童表浅血管性疾病诊治的临床价值。方法对临床疑诊或超声提示为高流量血管性疾病的患者行双源CT Flash大螺距联合个体化低剂量扫描,同时记录单期相扫描时间、单期相剂量长度乘积及全程剂量长度乘积,计算平均有效辐射剂量。所得图像进行三维CT重建,由两位中级以上医师对图像给予诊断,根据诊断结果制定临床治疗方案并随访治疗效果。结果 35例患者中共发现46处病变(平均7.4岁),其中血管瘤9例(9/35,25.71%),动静脉畸形14例(14/35,40.00%),静脉畸形12例(12/35,34.29%),单期相及全程平均有效辐射剂量分别为(0.45±0.16)、(1.31±0.42) mSV,单期相平均扫描时间为(0.69±0.15) s。结论双源CT Flash大螺距联合个体化低剂量扫描及三维重建技术可清晰地显示血管性病变同时明显降低辐射剂量,为临床诊治提供依据。
Objective To evaluate the diagnostic and therapeutic value of flash spiral dual-source CT with low-dose scan for children with superficial vascular anomalies(VAs). Methods For patients with suspected VAs and affluent blood flow pre-detected by ultrasound, CT was performed with high-pitch mode, individualized low-dose scan protocol and three-dimensional reformation. Single-phase scan time, single-phase dose-length product and total dose-length product were recorded, and the effective radiation doses were calculated. Images were diagnosed by two physicians, therapeutic plans were formulated, and the therapeutic efficacy was followed up. Results Altogether 46 lesions were identified in 35 children(mean age of 7.4 years), including 9 with hemangioma(9/35, 25.71%), 14 with arteriovenous malformation(14/35, 40.00%), and 12 with venous malformation(12/35, 34.29%). The average effective radiation doses of a single phase and total procedure were(0.45±0.16)mSV and(1.31±0.42)mSV, respectively. The average scan time of a single phase was(0.69±0.15)s. Conclusion Flash spiral dual-source CT with high-pitch mode, low-dose scan protocol and 3D reformation is an effective modality for imaging VAs with affluent blood flow in children. It can clearly show lesions and significantly reduce the radiation doses at the same time.
作者
于鑫鑫
郭磊
程召平
段艳华
王锡明
YU Xinxin;GUO Lei;CHENG Zhaoping;DUAN Yanhua;WANG Ximing(Shandong University Cheeloo College of Medicine,Jinan 250012,Shandong,China;Department of Radiology,Shandong Medical Imaging Research Institute,Jinan 250021,Shandong,China;Department of Interventional Radiology,Qilu Children,s Hospital of Shandong University,Jinan 250021,Shandong,China)
出处
《山东大学学报（医学版）》
CAS
北大核心
2019年第1期68-74,共7页
Journal of Shandong University:Health Sciences
基金
国家自然科学基金(81371548
81571672)
山东省泰山学者专项经费(2015年)
关键词
双源CT
低剂量
血管瘤
血管畸形
治疗
Dual-source CT
Low dose
Hemangioma
Vascular malformation
Treatment
