先天性脊柱侧弯矫治术前全脊柱三维磁共振成像的价值

Value of whole spine three-dimensional MRI before congenital scoliosis corrective surgery

目的:探讨全脊柱三维(3D)MRI在先天性脊柱侧弯(CS)矫治术前的诊断及评估价值。方法:对31例CS患者进行常规2D MRI及3D MRI扫描,并将3D MRI图像采用主机自带Composing无缝拼接软件拼接成全脊柱图像。由2名副高以上职称的放射科医师采用5分法对2组图像进行质量评分,并测量2组图像主弯Cobb角,记录测量时间。结果:3D MRI图像质量评分[(4.79±0.41)分)]显著高于2D MRI[(4.40±0.66)分],且两者差异具有统计学意义(Z=3.46,P=0.00<0.05);2D、3D MRI图像的主弯Cobb角分别为(44.29°±16.03°)和(44.56°±15.63°),两者差异无统计学意义(t=0.91,P=0.37>0.05);3D MRI图像Cobb角测量所耗时间[(34.79±15.57)s]短于2D MRI[(43.44±16.98)s],且两者差异具有统计学意义(Z=6.69,P=0.00<0.05)。结论:全脊柱3D MRI无缝拼接技术所得图像质量高,测量效率高,可替代常规2D MRI进行CS矫治术前的诊断及评估。

Objective：To investigate the diagnostic value of whole spine three-dimensional（3D）magnetic resonance imaging（MRI）before congenital scoliosis（CS）corrective surgery.Methods：Thirty-one CS patients were collected.All subjects underwent both 2Dand 3D MRI of the spine before the corrective surgery.Then 3D MR images were seamless spliced to the whole spine images using the built-in software ＂Composing＂.All images were evaluated and scored by two well-experienced radiologists,using a five-point scale.In addition,the major curve Cobb angles were measured,and the measuring time was recorded.Results：The quality score of 3D MR sequence was（4.79±0.41）,which is significantly higher than that of 2D MR sequence[（4.40±0.66）;Z=3.46,P〈0.05].There was no significant difference in the measured value of Cobb angle between two groups[（44.29°±16.03°）versus（44.56°±15.63°）].The average measuring time of Cobb angles was（34.79±15.57）s with 3D MR sequence and（43.44±16.98）s with 2D MR sequence,with statistically significant difference（Z= 6.69,P〈0.05）.Conclusion：Whole spine 3D MRI with seamless splicing technology provides high quality images,increases measuring efficiency of related Cobb angles;thus it could be valuable for the comprehensive evaluation before CS corrective surgery,instead of the conventional 2D MR sequence.