摘要
目的采用256层螺旋CT评价双侧内乳动脉与胸骨正中线之间距离,以及双侧内乳动脉末端分支情况。方法回顾性分析566例连续行CT胸部增强检查的患者的影像学资料,通过最大密度投影(MIP)及3D容积再现(VR)技术显示患者双侧内乳动脉走行及分支情况。SPSS 17.0对双侧内乳动脉与胸骨正中线距离进行配对t检验。结果566例患者双侧内乳动脉走行及分支情况显示清晰,显示率为100%。右侧内乳动脉第六肋水平与胸骨正中线间距离是(28.32±4.88)mm,左侧距离是(27.87±4.87)mm。右侧间距较对侧稍大,两者间差异有统计学意义(P<0.005)。右侧内乳动脉分支两支者414例(73.14%)、三支者133例(23.50%)、四支者19例(3.36%)。左侧内乳动脉分支两支者461例(81.45%)、三支者102例(18.02%)、四支者3例(0.53%)。两侧内乳动脉分支组合最常见的是右侧两分支-左侧两分支型(348例,61.48%),其次是右侧三分支-左侧两分支型(100例,17.67%)、右侧两分支-左侧三分支型(64例,11.31%)。结论双侧内乳动脉与胸骨正中线距离差异有统计学意义,右侧距离较左侧稍远。双侧内乳动脉末端分支存在明显的个体差异,256层螺旋CT能够将其清晰显示,对术前评估有一定临床意义。
Objective To evaluate the distances between the internal mammary arteries（IMAs） and the middle line of the sternum at the level of the sixth anterior rib,and observe the terminal branches of the internal mammary arteries in adult group using 256-slice multidetector computed tomography（MDCT）.Methods 566 consecutive patients were included in the study who underwent chest contrast computed tomography.Maximum intensity projection（MIP） images on coronal and sagittal planes,and three-dimensional volume rendering（VR） reconstruction images were obtained and used for the measurement of the distance between the IMAs and the middle line of the sternum at the sixth anterior rib level and observation of terminal branches.The difference of the distances between both sides of IMAs and the middle line of the sternum at the level of the sixth anterior rib was analyzed by SPSS 17.0 commercial software using t-testing.Results The IMAs were present in all patients.The distances on the right and left sides were（28.32±4.88）mm,（27.87±4.87）mm at the sixth rib level.The terminal branches of IMAs were variant,on the right side two branches in 414 people（73.14%）,three branches in 133 people（23.50%）,four branches 19 people（3.36%）;on the left side two branches in 461 people（81.45%）,three branches in 102 people（18.02%）,and four branches in 3 people（0.53%）.The most frequently arrangements of both sides of IMAs were right two branches-left two branches（348 people,61.48%）,right three branches-left two branches（100 people,17.67%）,and right two branches-left three branches（64 people,11.31%）.Conclusion The distances between the internal mammary arteries（IMAs） and the middle line of the sternum at the level of the sixth anterior rib were different,the right IMAs were more distant than the left ones.The variation of the terminal branches of IMAs was detected.Excellent anatomic evaluation capacity of MDCT facilitated the observation of variations,and may be useful for preoperational evaluation.
出处
《中华全科医学》
2012年第2期298-300,共3页
Chinese Journal of General Practice
