老年前期人群动脉韧带钙化与主动脉弓钙化斑块的CT鉴别

CT Differential Diagnosis of Calcification of the Ligamentum Arteriosum and Aortic Arch Calcified Plaque in the Presenile Population

目的探讨老年前期人群动脉韧带钙化与主动脉弓钙化斑块多层螺旋CT鉴别诊断的应用价值。方法回顾性分析临床怀疑胸部病变的200例患者(50~59岁),应用多层螺旋CT进行扫描,薄层纵隔窗观察动脉韧带钙化和主动脉弓钙化的位置和形状,计算其发生率、测量其密度。结果动脉韧带钙化发生于主动脉弓与左肺动脉干之间动脉韧带走行区,多数呈条状及点状,发生率为27.00%,CT值(247.63±92.23)HU;主动脉弓钙化可以发生于主动脉弓各个位置,呈斑片状及点状,多发常见,发生率为45.00%,CT值(448.44±222.41)HU。结论动脉韧带钙化发生于动脉韧带走行区,呈条状及点状居多,在发生率、位置、形态、密度等方面与主动脉弓钙化具有明显差别。

Objective To evaluate the value of multi-slice spiral CT in the differential diagnosis of calcification of the ligamentum arteriosum(CLA)and aortic arch calcified plaque in the presenile population.Methods 200 patients aged 50-59 years with clinically suspected chest lesions were retrospectively analyzed,scanned with multi-slice spiral CT,calculated the incidence,observed the location and the shape,measured the density of CLA and aortic calcified plaque in the thin-layer mediastinal window image.Results CLA occurred between the aortic arch and the left pulmonary trunk,most of which were strip and spotted,with an incidence of 27.00%,the CT value was(247.63±92.23)HU.Aortic calcified plaque occurred in all positions of the aortic arch,patchy and spotted,some were multiple,with an incidence of 45.00%,and the CT value was(448.44±222.41)HU.Conclusion CLA occurs in the area of arterial ligament,mostly in strip and spotted shape,which is significantly different from aortic calcified plaque in incidence,location,shape and density,et al.