Pool Garrett M, Didier Ryne A, Bardo Dianna, Selden Nathan R, Kuang Anna A
General Surgery, Bassett Medical Center, Cooperstown, New York; and
Departments of 2 Radiology.
J Neurosurg Pediatr. 2016 Aug;18(2):201-6. doi: 10.3171/2016.2.PEDS15475. Epub 2016 Apr 29.
OBJECTIVE The aim of this study was to develop soft-tissue and bony anthropometric orbital measurements in a normal pediatric population based upon CT scans. METHODS This was a retrospective stratified study of children with ages ranging from birth to 36 months. Head CT images for 204 children were available and obtained with 0.625-1-mm slice widths. Soft-tissue and bone windows were reviewed. Images were oriented in the Frankfort horizontal plane, and the intercanthal (IC), bony interorbital (IO), and bony lateral orbital (LO) distances were measured. Age group stratifications were 0-3, > 3-6, > 6-9, > 9-12, > 12-18, > 18-24, > 24-30, and > 30-36 months. Patients with known syndromes or craniofacial abnormalities were excluded. Statistical analysis included the mean, SD, SEM, 95% CI, and an evaluation of IO:LO ratio. RESULTS There was an average of 25.5 patients in each age group (range 25-27 patients). All soft-tissue and bony measurements consistently showed rapid increase from 0-6 months of age, which tapered after age > 12 months. The mean IC, bony IO, and bony LO distances started at 22.22 ± 1.13 mm, 14.16 ± 0.74 mm, and 65.56 ± 1.76 mm, and at 12 months were 27.74 ± 1.01 mm, 16.21 ± 0.75 mm, and 77.98 ± 1.57 mm, respectively. The bony LO position was equivalent to the lateral canthal position and measurements. The IC distance was approximately one-third the lateral canthal distance for all age groups. CONCLUSIONS This study established and reported normal anthropometric orbital measurements in a pediatric population using fine-cut craniofacial CT. These measurements are essential when evaluating children with craniofacial anomalies.
目的 本研究的目的是基于CT扫描，在正常儿科人群中开展软组织和骨性人体测量学眶部测量。方法 这是一项对年龄在出生至36个月的儿童进行的回顾性分层研究。获取了204名儿童的头部CT图像，层厚为0.625 - 1毫米。对软组织窗和骨窗进行了观察。图像以法兰克福水平面为基准进行定位，测量了内眦间距（IC）、骨性眶间距离（IO）和骨性眶外侧距离（LO）。年龄组分层为0 - 3个月、＞3 - 6个月、＞6 - 9个月、＞9 - 12个月、＞12 - 18个月、＞18 - 24个月、＞24 - 30个月和＞30 - 36个月。排除已知患有综合征或颅面异常的患者。统计分析包括均值、标准差、标准误、95%置信区间以及对IO:LO比值的评估。结果 每个年龄组平均有25.5名患者（范围为25 - 27名患者）。所有软组织和骨性测量结果均一致显示，在0至6个月龄时快速增加，在12个月龄后逐渐变缓。平均IC、骨性IO和骨性LO距离起始值分别为22.22±1.13毫米、14.16±0.74毫米和65.56±1.76毫米，在12个月时分别为27.74±1.01毫米、16.21±0.75毫米和77.98±1.57毫米。骨性LO位置与外眦位置及测量值相当。所有年龄组的IC距离约为外眦距离的三分之一。结论 本研究利用高分辨率颅面CT建立并报告了儿科人群正常的人体测量学眶部测量值。这些测量值在评估颅面异常儿童时至关重要。
