Clinical Application of Low-Dose Dual-Source of Cerebral and Carotid Arteries
During Aortic CT Angiography in Type A Aortic Dissection
ZHAO Honglianga, ZHENG Minwena, DUAN Weixunb, LI Jiana, SHI Mingguoa, WANG Jinc
a.Department of Radiology; b.Department of Cardiovascular Surgery; c.Office of Radioactive Medicine, Xijing Hospital, The Fourth
Military Medical University, Xi’an Shaanxi 710032, China
Abstract:Objective To evaluate the low-dose dual-source head, neck and aorta CT angiography (CTA) in assessing the
arteries of type A aortic dissection (ATAAD). Methods Low-dose head, neck and CTA were performed in 133 consecutive
patients with suspected ATAAD. The volume CT dose index (CTDIvol) and dose-length product (DLP) were obtained for
all scans. Subjective image quality of intracranial, cervical, thoracic and abdominal arteries were assessed. In addition,
the surgery related CTA features as well as the Willis circle variations were recorded and analyzed. Results One hundred
and twenty-three patients with definite diagnosis of ATAAD were enrolled in this study. Mean CTDIvol and DLP for all
patients were (3.4±0.3) mGy and (314.1±29.3) mGy·cm. The detection rates of interlayer tearing involved in cervical artery
(n=58), decreased lateral carotid artery density (n=10), carotid atherosclerotic plaque (n=15), dysplasia of vertebral artery (n=12),
left vertebral artery with autonomic arterial arch (n=4), right vagus subclavian artery (n=3), intracranial arterial stenosis (n=19) and
intracranial aneurysm (n=7) were 47.2%, 8.1%, 12.2%, 9.8%, 3.3%, 2.4%, 15.5% and 5.7% respectively. The Willis circle anatomic
variation was found in 57 (46.3%) patients. Conclusion A combined CTA of head, neck and aorta in ATAAD is feasible. The
incremental craniocervical information may lead to improved clinical outcomes.
赵宏亮a,郑敏文a,段维勋b,李剑a,石明国a,王晋c. 低剂量双源CT头颈主动脉联合扫描的可行性及在A型主动脉夹层的临床应用价值[J]. 中国医疗设备, 2017, 32(11): 8-11.
ZHAO Honglianga, ZHENG Minwena, DUAN Weixunb, LI Jiana, SHI Mingguoa, WANG Jinc. Clinical Application of Low-Dose Dual-Source of Cerebral and Carotid Arteries
During Aortic CT Angiography in Type A Aortic Dissection. China Medical Devices, 2017, 32(11): 8-11.