目的 基于CT图像测量不同层面腹主动脉与左侧腰大肌距离(distance between the abdominal aorta and the left psoas major,DALP),分析其影响因素.方法 回顾116例正常成人CT和临床资料,测量L2-L5椎间盘层面DALP、左侧腰大肌径线、腰大肌横截面积(cross-sectional area.CSA)、主动脉直径,L2椎体横径及面积、L2和脐水平前腹壁脂肪组织厚度、L2和脐水平皮下脂肪组织面积(subcutaneous fat area,SFA)及腹内脂肪组织面积(visceral fat area,VFA),并计算 L2和脐水平 VFA/SFA;测量82例患者L2～5椎间盘层面左侧腰大肌放射学密度、密度标准差、放射性密度比(radiographic density ratio,RDR).分析不同椎间盘层面DALP与其他指标的相关性.结果 DALP于L2～L5呈递减趋势.年龄与L2～L5椎间盘层面DALP呈正相关(均P＜0.01).L2～L3椎间盘层面DALP与该层面腰大肌CSA呈负相关(P＜0.01),与L2水平VFA/SFA呈正相关(P＜0.05);L3～L4椎间盘层面DALP与腰大肌CSA呈负相关(P＜0.01),与L2水平VFA/SFA呈正相关(P＜0.01);L4～L5椎间盘层面DALP与该层面腰大肌CSA呈负相关(P＜0.01),与L2水平VFA/SFA呈正相关(P＜0.05).结论 CT图像上,腹主动脉与左侧腰大肌距离与年龄、腰大肌CSA和L2水平VFA/SFA有关;术前行CT检查对OLIF手术具有指导意义.
CT anatomical study of influential factors on the distance between abdominal aorta and left psoas major muscle
Objective To measure the distance between the abdominal aorta and the left psoas major(DALP)at different levels based on CT images and analyzed its influential factors.Methods The CT and clinical data of 116 normal adults were retrospectively analyzed.The following measurements were taken:DALP,diameter of the left psoas major,cross-sectional area(CSA)of the psoas major,aortic diameter,transverse diameter and area of the L2 vertebral body,thickness of anterior abdominal wall fat at L2 and navel level,subcutaneous fat area(SFA),visceral fat area(VFA)at L2 and navel level.Additionally,VFA/SFA ratios were calculated at both L2 and navel levels.The radiographic density,density standard deviation and radiographic density ratio(RDR)of the left psoas major muscle at three intervertebral disc levels of L2-L5 were measured in 82 patients.The correlation between the DALP and other data at three intervertebral disc levels of L2-L5 was analyzed,and the regression equation was calculated.Results The DALP decreased from level L2toL5.Age was positively correlated with DALP at L2-L5 disc level(all P＜0.01).The DALP at the L2-L3 disc level was negatively correlated with the CSA of the psoas major at the L2-L3 disc level(P＜0.01),and positively correlated with the VFA/SFA at L2 level(P＜0.05).The DALP was negatively correlated with the CSA of the psoas major at the L3-L4 disc level(P＜0.01),and positively correlated with the VFA/SFA at L2 level(P＜0.01).The DALP was negatively correlated with the CSA of the psoas major at L4-L5 disc level(P＜0.01),and positively correlated with the VFA/SFA at L2 level(P＜0.05).Conclusions On CT images,the distance between the abdominal aorta and the left psoas major was influenced by age,CSA of the psoas major and the VFA/SFA at L2 level.Preoperative CT examination is of great significance in guiding the OLIF operation.
万方数据
维普
