多层螺旋CT后处理测量肩胛盂曲率半径的实验研究

Experimental Study of Method Measuring the Scapula Glenoid Radius of Curvature with Postprocessing Technique of Multi-slice Spiral CT

目的:探讨多层螺旋CT(MSCT)后处理测量肩胛盂曲率半径的方法。方法:收集成人肩胛骨干标本50个、成人肩关节防腐湿标本50个,用16层螺旋CT扫描仪扫描,行轴位厚层多平面重组(MPR)、薄层多平面重组测量肩胛盂曲率半径,进行统计学处理。结果:肩胛盂前后曲率半径厚层MPR和薄层MPR测量值配对t检验统计学差异不显著(P>0.05),盂上下曲率半径厚层MPR和薄层MPR测量值配对t检验有统计学差异(P<0.001)。盂上下曲率半径、前后曲率半径厚层MPR与薄层MPR测量值独立样本t检验有统计学差异(P<0.001),肩胛骨干、湿标本盂前后曲率半径厚层MPR测量值(4.14±1.01)cm、(5.31±1.17)cm,薄层MPR测量值(4.05±1.04)cm、(5.29±1.27)cm,肩胛骨干、湿标本盂上下曲率半径厚层MPR测量值(4.07±0.83)cm、(4.82±0.98)cm,薄层MPR测量值(3.72±0.59)cm、(4.37±0.70)cm。结论:多层螺旋CT厚层MPR测量肩胛盂曲率半径是更简单、更快捷的方法,肩胛骨干、湿标本盂曲率半径差异较大,在肩关节假体设计中应考虑该解剖特点。

Objective：To investigate the method measuring the scapula glenoid radius of curvature with multi-slice spiral CT postprocessing technique.Methods：Fifty dry scapula specimens and 50 wet anticorrosive shoulder specimens of Chinese adults were scanned with Siemens Somatom Sensation 16 scanner.The scapula glenoid radius of curvature was analyzed with postprocessing technique of thick multiplanner reformation（MPR）and thin multiplanner reformation（MPR）.The total data were analyzed by Statistics.Results：The Statistics showed that there was no significant difference between the two measurement methods of antero-posterior radius of curvature（P0.05）,significant difference between two measurement methods of supero-inferior radius of curvature（P0.001）,and significant difference between the dry scapula specimens and wet anticorrosive shoulder specimens（P0.001）.The scapula glenoid antero-posterior radius of curvature of dry scapula specimens and wet anticorrosive shoulder specimens were respectively（4.14±1.01） cm,（5.31±1.17） cm measured by thick MPR,and（4.05±1.04） cm、（5.29±1.27） cm measured by thin MPR.The supero-inferior radius of curvature of two kinds of specimens were respectively（4.07±0.83） cm,（4.82±0.98） cm measured by thick MPR,and （3.72±0.59） cm,（4.37±0.70） cm.measured by thin MPR.Conclusion：The method of measuring the scapula glenoid radius of curvature with thick multiplanner reformation（MPR）of MSCT is more simple and faster.The scapula glenoid radius of curvature is markedly variable between the dry scapula specimens and wet anticorrosive shoulder specimens,which should be considered in the design of shoulder prosthesis.