超声测距法定位中晚孕期胎儿脊髓圆锥位置

作者:杨硕;宋鑫;张文君;刘静华;吴昀 刊名:中国医学影像技术 上传者:邢献军

【摘要】目的通过二维和三维超声测量中晚孕期胎儿脊髓圆锥(CM)末端至骶尾部最后一个骨化中心(CS)的距离来定位CM,探索胎儿期CM位置变化的规律。方法采用二维超声成像及三维超声表面成像检查孕19~34周566名孕妇,测量胎儿CS距离。采用3D容积存储系统存储图像、real-time 3D View软件离线分析,采用组内相关系数(ICC)评价二维与三维超声检测CS距离的一致性。分析胎儿期各孕周CS距离变化规律。结果共253名二维与三维超声成像测量的CS距离一致性好(ICC=0.974)。CS距离与胎儿孕周呈正相关(r=0.956,P<0.001),线性回归方程为:Y=0.262 X-2.508(Y:CS距离,X:孕周)。结论三维超声表面成像测量CS距离的方法简单有效,适用于临床;CS距离与胎儿GA间的相关性可作为胎儿期CM是否低置的判断标准。

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· 27O · 国垦学 像撞术 zO16年第 32卷第 2期 Chin J Med Imaging Technol,2016,Vol 32,No 2 ·◆.妇 M easuring distance ultrasonics m ethod locating fetal conus medullaris in second and third trimester 产 科 影像 学 YANG Shuo ,SONG Xin ,ZHANG Wenj“"。,LJUJinghua , U Yun (1.Department of Ultrasonography of Maternity Center,2.Department of Ultrasonography, Taihe Hospital,Shiyan 442000,China;3.Department of Ultrasonography, Shenzhen Longgang District Maternity& Child Healthcare H ospital,Shenzhen 518172,China) [Abstract] 0bjective To explore the changing regular pattern of conus medullaris(CM)position in second and third tri— mester through measuring the distance from the end of tO the last sacrococcygeaI ossification center(CS)with tWO—dimen— sional and three—dimensional ultrasuond. M ethods Totally 566 pregnant women,19 to 34 weeks gestation, underwent tWO—dimensional ultrasonic imaging and three—dimensional ultrasonic surface imaging.Three—dimensional volume data was collected and real—time 3D view post—processing software was offline analyzed.Intra—class correlation coefficient(ICC)test was used to analyzing the consistency of the results o{tWO—dimensional and three—dimensional ultrasonics.The changing regular pattern of CS distance in deferent gestation was assessed.Results There were 253 cases which had good consisten— cy of tWO—dimensional and three-dimensional ultrasonics in measuring CS distance(ICC= 0.974). The correlation between CS distance and gestational age was positive (r: 0.956,P< 0.001)

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