MR评价漏斗胸患儿心脏形态的可行性

Value of MRI in assessing cardiac morphology in children with pectus excavatum

目的比较基于MR 3D T1序列图像与常规CT图像的心脏形态指标的相关性,评估MR在评价漏斗胸患儿心脏形态中的可行性。方法选取我院胸外科的漏斗胸胸畸形患儿39例,术前行胸部MR检查及胸部CT检查,在胸骨凹陷最明显层面测量Haller指数、心脏指数、心脏旋转角、最小心脏前后径、最大心脏前后径、心脏横径。比较MR与CT测量值的相关性及有无统计学差异。结果 Haller指数相关系数0.92、心脏指数0.88、心脏旋转角0.87、最小心脏前后径0.86、最大心脏前后径0.49、心脏横径0.90,P均小于0.05,MR与CT的测算结果相关性均较好,t检验显示心脏横径、心脏指数具有统计学差异,余未见明显统计学差异。结论 MR 3D T1序列图像的与CT图像对评价漏斗胸患儿心脏形态指标一致性好,可以代替CT检查来进行无创检查及远期术后随观。

Objective To evaluate the correlation between the cardiac morphological indexes on 3-D T1-weighted MRI and CT in children with pectus excavatum. Methods 39 children with peetus excavatum underwent chest MRI and CT preoperatively. Hailer index, cardiac compression index, cardiac rotation angle, minimal antero-posterior （AP） diameter, maximal AP diameter, and transverse diameter were measured at the level of maximal sternal depression. The measurements obtained on MRI and CT were compared. Results The correlation was significant （P〈0.05） for cardiac compression index （R=0.88）, transverse diameter （R= 0.90）, Hailer index （R=0.92）, cardiac rotation angle （R=0.87）, minimal AP diameter （R=0.86）, and maximal AP diameter （R=0.49）. Conclusion The cardiac morphological indexes measured on 3-D T1-weighted MRI correlate well with CT and can replace the CT as a noninvasive examination in children with pectus excavatum.