Takalo R M, Mäkäräinen H P, Kaarina Jaakkola R
Department of Diagnostic Radiology of Oulu, University Central Hospital.
Acta Endocrinol (Copenh). 1991 Mar;124(3):238-44. doi: 10.1530/acta.0.1240238.
The purpose of this work was to determine by ultrasound the volume and echo structure of the thyroid gland in 13-year-old schoolchildren in northern Finland. 76 healthy schoolchildren underwent cervical ultrasound examinations during the period of Jan-Feb 1990, performed with a real-time scanner using a 7.5 MHz linear transducer and direct contact method. The volume of each lobe was calculated according to the formula for a volume of rotation ellipsoid by multiplication of maximal thickness, width and height of the lobe by the correction factor 0.479. Any focal lesion that could be distinguished in the homogenous thyroid parenchyma was assessed for echogenicity as compared with the normal thyroid gland and was measured with electronic calipers. The mean thyroid volume was 6.5 +/- 1.6 ml (mean +/- SD), being 6.3 +/- 1.8 ml in the boys and 6.7 +/- 1.4 ml in the girls. The sex difference was not significant. The right lobe was significantly larger than the left one (mean 3.7 and 2.8 ml, respectively). Thyroid volume was correlated with body weight and body surface area in both sexes. Abnormal lesions in terms of echo structure were noted in one subject (1.3%). Comparing the results with the findings reported from other countries, it can be concluded that the thyroid volume in these 13-year-old Finnish schoolchildren was about 30% less than that reported for the same age group in the FRG (with insufficient iodine intake) and about 35% more than in 13-year-old schoolchildren in Sweden (with sufficient iodine intake).
这项研究的目的是通过超声检查确定芬兰北部13岁学童甲状腺的体积和回声结构。1990年1月至2月期间，76名健康学童接受了颈部超声检查，使用7.5 MHz线性换能器的实时扫描仪和直接接触法进行检查。每个叶的体积根据旋转椭球体体积公式计算，即将叶的最大厚度、宽度和高度乘以校正因子0.479。在均匀的甲状腺实质中可区分的任何局灶性病变，与正常甲状腺相比评估其回声，并使用电子卡尺进行测量。甲状腺平均体积为6.5±1.6 ml（平均值±标准差），男孩为6.3±1.8 ml，女孩为6.7±1.4 ml。性别差异不显著。右叶明显大于左叶（分别平均为3.7和2.8 ml）。甲状腺体积与男女的体重和体表面积相关。在一名受试者（1.3%）中发现了回声结构异常的病变。将结果与其他国家报告的结果进行比较，可以得出结论，这些13岁芬兰学童的甲状腺体积比联邦德国（碘摄入不足）同年龄组报告的体积小约30%，比瑞典（碘摄入充足）13岁学童的体积大约35%。
