足头侧扫描方向对提高胸部血管成像图像质量的价值  

The Clinical Value of Caudocranial Scanning Direction in Improving the Image Quality of Thoracic CT Angiography

作　　者：张伟[1] 庞小娇[2] 龚建平[1] 蔡武[1] 乔方[1] 窦欣[1] 朱建兵[1] 

机构地区：[1]苏州大学附属第二医院影像诊断科,215004 [2]内蒙古赤峰市医院功检科,024000

出　　处：《临床放射学杂志》2014年第4期609-611,共3页Journal of Clinical Radiology

基　　金：苏大附二院青年职工预研项目(编号:SDFEYQN1205)

摘　　要：目的探讨足头侧扫描方向对提高胸部CT血管成像(CTA)图像质量的价值。方法将60例行胸部CTA检查患者随机分为两组(每组30例),分别行头足侧及足头侧扫描,其他扫描参数相同。扫描完成后,测量并比较降主动脉、肺动脉主干、右下肺动脉、左上肺动脉、左下肺动脉、右下肺静脉、左上肺静脉、左下肺静脉的CT强化值,对胸部CTA质量进行评价,并对上腔静脉伪影及呼吸运动伪影进行评分。结果两组胸部血管的CT强化值差异无统计学意义(P值均>0.05)。两组间的胸部CTA质量评价,差异无统计学意义(P值均>0.05)。足头侧组的上腔静脉伪影低于头足侧组,评分分别为3.63±0.49、3.07±0.64(P值<0.001)。两组间的呼吸运动伪影差异无统计学意义。结论胸部CTA成像时,采用足头侧扫描方向,可以降低上腔静脉伪影,提高图像质量。Objective To assess the clinical value of caudocranial scanning direction in improving the image quality of thoracic CT angiography （CTA）. Methods A total of 60 patients were randomly and equally divided into two groups with 30 cases in each group. Thoracic CTA was carried out in all patients. For patients in the craniocaudal group CTA with craniocaudal scanning direction was used, while for patients in the candocranial group CTA with caudocranial scanning di- rection was adopted. All the other scanning parameters were the same for both groups. The CT enhancement value of de- scending thoracic aorta, main pulmonary artery, right lower lobe artery, left upper lobe artery, left lower lobe artery, right lower lobe vein, left upper lobe vein and left lower lobe vein were measured, and the results were compared between the two groups. The quality of thoracic CTA was evaluated, and the artifacts of superior vena cava （SVC） as well as the arti- facts due to respiratory motion were assessed. Results No statistically significant differences in CT enhancement value of thoracic vessels existed between the caudocranial group and the craniocaudal group （ P 〉 0.05 ）. And the difference in CTA image quality between the two groups was also not significant （P 〉 0.05 ）. The severity of SVC artifact in caudocranial group was slighter than that in craniocaudal group, and the scores of the two groups were （3.63 ± 0.49） and （ 3.07 ± 0. 64） respectively, the difference was statistically significant （P 〈0.001 ）. The difference in the artifacts due to respiratory motion was not significant between the two groups. Conclusion In the performance of thoracic CTA, the use of can- docranial direction scanning can reduce the artifacts of SVC and improve the image quality as well.

关 键 词：胸部 体层摄影术 X线计算机 血管造影术 扫描方向 

分 类 号：R816.4[医药卫生—放射医学]