磁感应式Freehand-3D超声与二维超声测量甲状腺模型体积准确性对比研究

Difference of accuracy between magnetic induction Freehand-3D ultrasound and two-dimensional ultrasound in measuring the volume of thyroid model

目的探讨磁感应式Freehand-3D超声与二维超声测量甲状腺模型体积的准确性。方法使用猪肝制作40个甲状腺模型,用排水法测量得出各模型的体积作为金标准。与金标准对比,比较二维超声、磁感应式Freehand-3D超声测量甲状腺模型体积的准确性。结果二维超声、磁感应式Freehand-3D超声测量法与金标准测量甲状腺模型体积准确性差异无统计学意义(均P>0.05)。各种超声测量法分别与金标准相比,磁感应式Freehand-3D超声测量甲状腺模型体积相关系数最高(r=0.998)。Bland-Altman分析显示磁感应式Freehand-3D超声测量值误差最小,相对误差均值为3.42%,误差范围为-9.57%~12.07%,一致性界限为(-1.253,0.999)。结论与二维超声相比,磁感应式Freehand-3D超声可以更加精准地测量甲状腺模型的体积。

Objective To investigate the difference of accuracy between magnetic induction Freehand-3D ultrasound and two-dimensional ultrasound in measuring the volume of thyroid model.Methods Forty thyroid models were established using porcine liver,and the Archimedes procedure was set as gold standard in the measurement of the volume of each model.The accuracy of measurement of the porcine thyroid model volume between two-dimensional ultrasound and magnetic induction Freehand-3D ultrasound were compared.Results There were no significant differences in the accuracy of measurements of thyroid model volume among two-dimensional ultrasound,magnetic induction Freehand-3D ultrasound and Archimedes procedure(all P>0.05).Compared with the Archimedes procedure,magnetic induction Freehand-3D ultrasonic method showed higher correlation coefficient of the measurement of thyroid model volume(r=0.998).Bland-Altman analysis showed the lower measure error with a relative error of 3.42%and range of-9.57%to 12.07%.And the limits of agreement were(-1.253,0.999)in the magnetic induction Freehand-3D ultrasonic measurement.Conclusions Compared with two-dimensional ultrasound,the magnetic induction Freehand-3D ultrasound show higher accuracy in the measurement of the volume of the thyroid model.