CAJ | 학술논문

目的探讨在正常肩盂CT三维重建标准正面观影像上确定肩盂下部圆心的可行性,比较同一个体左、右肩盂的半径大小,为术前精确定量评估肩盂骨缺损比例提供影像学依据. 方法本研究测量了35例成人双侧正常肩盂(共70个),每个肩盂均行64层螺旋CT扫描,由1位医生在三维工作站上获得肩盂的标准三维正面观影像及标尺,并将其以二维图像的格式导出.3位医生分别利用AutoCAD2006软件对图像进行处理,做肩盂下部前缘最突点、下缘最突点连线的垂直平分线,再做后缘最突点、下缘最突点连线的垂直平分线,将两垂直平分线的交点定为肩盂下部的圆心,分别测量该点到肩盂前下缘、后下缘和后缘的距离.比较3位医生测量的圆心到肩盂前下缘、后下缘和后缘距离值,以及左、右肩盂相应距离的测量数据. 结果肩盂下部圆心到肩盂后缘最突点之间的距离(即圆的半径)为(14.1±1.6)mm,到肩盂前下缘的距离为(14.0±1.7)mm,到肩盂后下缘的距离为(14.1±1. 6)mm.3位医生测量的圆心到肩盂后缘距离值之间及左、右肩盂相应测量值之间差异均无统计学意义(P>0.05). 结论在正常肩盂的CT三维标准正面观影像上利用肩盂下部前、后、下缘最突点确定肩盂下部圆心的方法是简便、可行的,可重复性较高.正常人左右肩盂下部的半径是一致的.以上结论可用于单侧肩盂骨缺损的精确定量评价.
목적 탐토재정상견우CT삼유중건표준정면관영상상학정견우하부원심적가행성,비교동일개체좌、우견우적반경대소,위술전정학정량평고견우골결손비례제공영상학의거. 방법 본연구측량료35례성인쌍측정상견우(공70개),매개견우균행64층라선CT소묘,유1위의생재삼유공작참상획득견우적표준삼유정면관영상급표척,병장기이이유도상적격식도출.3위의생분별이용AutoCAD2006연건대도상진행처리,주견우하부전연최돌점、하연최돌점련선적수직평분선,재주후연최돌점、하연최돌점련선적수직평분선,장량수직평분선적교점정위견우하부적원심,분별측량해점도견우전하연、후하연화후연적거리.비교3위의생측량적원심도견우전하연、후하연화후연거리치,이급좌、우견우상응거리적측량수거. 결과 견우하부원심도견우후연최돌점지간적거리(즉원적반경)위(14.1±1.6)mm,도견우전하연적거리위(14.0±1.7)mm,도견우후하연적거리위(14.1±1. 6)mm.3위의생측량적원심도견우후연거리치지간급좌、우견우상응측량치지간차이균무통계학의의(P>0.05). 결론 재정상견우적CT삼유표준정면관영상상이용견우하부전、후、하연최돌점학정견우하부원심적방법시간편、가행적,가중복성교고.정상인좌우견우하부적반경시일치적.이상결론가용우단측견우골결손적정학정량평개.
Objective To explore the feasibility and application of determining the center of the inferior portion of the glenoid on a standard anteroposterior view of the normal glenoid. Methods Seventy shoulders of 35 mature adults were measured in this study. A 64-slice CT 3D reconstruction was performed for each glenoid. A standard anteroposterior view and the scale of glenoid were made at a 3D workstation by one radiologist, and then transferred to software AutoCAD as 2D images. The 2D images were analyzed with AutoCAD respectively by 3 radiologists. The line was drawn between the most anterior and the most inferior points of the glenoid bony rim. On the same image, another line was drawn between the most posterior and the most inferior points of the glenoid bony rim. Two perpendicular bisectors of the 2 lines were drawn. The cross point of the 2 perpendicular bisectors was regarded as the circle center of the inferior part of the glenoid. The distances from the circle center to the anteroinferior and the posteroinferoir rims of the glenoid and the most posterior point were measured. Measurements were expressed as the mean ± standard deviation. Several related samples Friedman rank sum test was used to compare the measurements (the distance from the circle center to the most posterior point) by the 3 radiologists. Paired t tests were used to compare the differences between the left and right glenoids. Results The mean distance from the circle center to the most posterior point was ( 14. 1 ± 1.6) mm, the anteroinferior rim was ( 14. 0 ± 1.7) mm, and the posteroinferoir rim was ( 14. 1 ±1.6) mm. No significant differences were found ( P>0. 05) between measurements by the 3 radiologists. No significant differences were found ( P>0. 05) between the measurements of the both-side glenoids. Conclusions The method of determining the center of the inferior portion of the glenoid based on the most anterior,posterior and inferior points of the glenoid on a standard 3D anteroinferior view of the normal glenoid is easy,practical and highly repeatable. The radius of the left glenoid is comparable to the radius of the right side in normal shoulders. This method can be used to quantify a glenoid bone defect precisely.