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第45卷第2期 南京医科大学学报(自然科学版)
2025年2月 Journal of Nanjing Medical University(Natural Sciences) ·227 ·
·临床研究·
升主动脉局限性内膜撕裂CT血管成像的影像学特征分析
沈文婷,徐 怡,王云飞,殷 凡,施夏韵,朱晓梅 *
南京医科大学第一附属医院放射科,江苏 南京 210029
[摘 要] 目的:探讨急性主动脉综合征(acute aortic syndrome,AAS)患者升主动脉局限性内膜撕裂(limited intimal tear,LIT)
的影像特点,比较LIT 与其他AAS 病变的影像学差异。方法:回顾性收集212例升主动脉AAS 和212例正常对照组的主动脉
CT 血管成像资料,其中主动脉夹层(aortic dissection,AD)120 例,壁内血肿(intramural hematoma,IMH)52 例,LIT 40 例。影像
学参数包括病变处和无病变处升主动脉、相应层面降主动脉的长短径和管腔面积;计算主动脉重构指数(长径/短径)。
结果:LIT 组无病变处升主动脉长径大于AD组、IMH组(P均 < 0.05),病变处管腔重构指数也高于AD组、IMH组(P均 < 0.05)。
二元Logistic 回归结果提示无病变处升主动脉长径是发生LIT的独立预测因子(OR=1.533,P < 0.001)。结论:LIT的影像学参
数与其他AAS病变存在差异;当怀疑AAS患者的升主动脉长径 > 40.5 mm时,临床需警惕LIT。
[关键词] 急性主动脉综合征;局限性内膜撕裂;主动脉夹层;主动脉壁内血肿;CT血管成像
[中图分类号] R814.42 [文献标志码] A [文章编号] 1007⁃4368(2025)02⁃227⁃06
doi:10.7655/NYDXBNSN240744
Investigation of imaging features of limited intimal tear of ascending aorta based on CT
angiography
SHEN Wenting,XU Yi,WANG Yunfei,YIN Fan,SHI Xiayun,ZHU Xiaomei *
Department of Radiology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China
[Abstract] Objective:To investigate the imaging features of limited intimal tear(LIT)of ascending aorta in patients with acute
aortic syndrome(AAS),and compare the imaging differences between LIT and other types of AAS. Methods:CT angiography(CTA)
data of 212 patients with AAS and 212 normal controls were retrospectively enrolled. There were 120 cases of aortic dissection(AD),
52 cases of intramural hematoma(IMH)and 40 cases of LIT. The imaging parameters included maximal diameter,minimal diameter
and area of the ascending aorta at the lesion,adjacent normal ascending aorta and descending aorta at corresponding level respectively.
Aortic remodeling index was calculated as maximal diameter/minimal diameter. Results:The maximal diameter of involved ascending
aorta in LIT group were larger than those in AD group and IMH group(P < 0.05),the remodeling index was also higher than that in the
AD group and IMH group(P < 0.05). Binary logistic regression analysis suggested that the maximal diameter of ascending aorta was an
independent predictor of LIT occurrence(OR:1.533,P < 0.001). Conclusion:The imaging parameters of LIT are different from those of
other types of AAS lesions. When the maximal diameter of the ascending aorta was greater than 40.5 mm in patients with suspected
AAS,LIT should be considered clinically.
[Key words] acute aortic syndrome;limited intimal tear;aortic dissection;aortic intramural hematoma;CT angiography
[J Nanjing Med Univ,2025,45(02):227⁃232]
急性主动脉综合征(acute aortic syndrome,AAS)
是一组危及生命的血管急症,AAS 患者的病死率极
[基金项目] 国家自然科学基金(82302163);南京医科大学
高 [1-2] ,需要快速诊断及治疗 [3-4] 。AAS 主要包括主
第一附属医院青年学者培养基金(PY2022036)
∗ 动脉夹层(aortic dissection,AD)、壁内血肿(intramural
通信作者(Corresponding author),E⁃mail:xiaomeizhu@njmu.
edu.cn(ORCID:0000⁃0002⁃7591⁃9930) hematoma,IMH)、穿透性动脉粥样硬化性溃疡(pen⁃

