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

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.