【摘要】 目的通过MR血管成像(MRA)测量主动脉-肠系膜上动脉夹角(AMA),并评估其与体重指数(BMI)的相关性。资料与方法行腹部MRI检查的605例非肠系膜上动脉综合征(SMAS)患者,按照性别及BMI各分成4个级别(Ⅰ级:BMI<18.5kg/m2;Ⅱ级:BMI18.5～24.9kg/m2;Ⅲ级:BMI25～29.9kg/m2;Ⅳ级:BMI≥30kg/m2)。于三维对比增强MRA(3D-CE-MRA)序列最大密度投影(MIP)矢状面重组图像上测量AMA,分析不同性别患者AMA与BMI、BMI分级之间的相关性。结果男女组AMA与BMI均呈显著正相关(r=0.51、0.54,P<0.01),AMA与BMI分级均呈中等相关(r=0.40、0.43,P<0.01)。随BMI增加,AMA增大。结论通过3D-CE-MRA测量的AMA和BMI显著相关,可以为MRA诊断SMAS提供参考值标准。更多还原

【Abstract】 Purpose To investigate the relationship between body mass index(BMI) and aortomesenteric angle(AMA) measured by MR angiography(MRA).Materials and Methods 605 patients referred for abdominal MRI examinations without clinical evidence of suspect SMAS were included.The patients were divided into four groups according to BMI(group 1:BMI < 18.5 kg/m 2;group 2:BMI 18.524.9 kg/m 2;group 3:BMI 25-29.9 kg/m 2;group 4:BMI ≥30 kg/m 2) in both genders.3D-CE-MRA was performed using a 3D FISP sequence.On the reformatted sagittal maximum intensity projection images,the AMA was measured.The relationships between AMA and BMI as well as BMI category of different genders were analyzed.Results For both females and males,there was significant positive correlation between the AMA and BMI(r =0.51,r=0.54,respectively,P<0.01).The correlations between the BMI category and AMA were moderate and significantly positiveas well(r =0.40,r =0.43,respectively,P < 0.01).The results showed a positive correlation between BMI and AMA.Conclusion The AMA measured by 3D-CE-MRA significantly correlates with BMI in normal population.The mean values may be referenced to help diagnose superior mesenteric artery syndrome.更多还原