颈部CT三维重建与超声评估残留甲状腺体积的准确性比较

目的对比研究颈部CT三维重建与超声在评估残留甲状腺体积中的准确性。方法回顾性分析17例（共21个残留甲状腺腺叶）2017年2月~2018年3月于我院普通外科行残留甲状腺腺叶切除术患者的临床资料，分别对比患者术前超声残留甲状腺体积与术中残留甲状腺实体标本所测体积、术前三维CT重建下所测甲状腺体积与术中残留甲状腺实体标本所测体积。结果与术中实体标本所测残留甲状腺体积数据对比，术前超声所测残留甲状腺体积在最大上下径、最大前后径上的差异有统计学意义（P<0.05），在最大左右径上的差异无统计学意义（P>0.05），颈部CT三维重建下所测的残留甲状腺体积在最大上下径、最大左右径、最大前后径上的差异均无统计学意义（P>0.05）。结论超声在对残留甲状腺体积的评估上存在一定的误差，而颈部CT三维重建技术在评估残留甲状腺体积中更加准确，可为临床计算甲状腺癌术后I131治疗剂量提供更可靠的理论依据。

Three-dimensional reconstruction of cervical CT vs ultrasound for estimating residualthyroid volume

Objective To compare the accuracy of three-dimensional reconstruction of cervical CT and ultrasound for estimatingresidual thyroid volume. Methods We performed a retrospective analysis of 17 patients with 21 residual thyroid glandsundergoing thyroidectomy surgery between February, 2017 and March, 2018 in our department. We compared the residualthyroid volume in preoperative ultrasound with the intraoperative measurement and the volume measured using threedimensionalCT reconstruction before surgery. Results The maximum vertical and anterioposterior diameters of the residualthyroid measured by preoperative ultrasound differed significantly from the volume data measured intraoperatively (P<0.05),but the difference in the maximum left-right diameters was not statistically significant (P>0.05). The maximum vertical, leftright,and anteroposterior diameters estimated by three-dimensional reconstruction of cervical CT was all similar with thosemeasured intraoperatively (P>0.05). Conclusion Compared with ultrasound examination, three-dimensional reconstruction ofneck CT is more accurate for estimating the residual thyroid volume and provides more reliable evidence for clinicalcalculation of postoperative I131 dose for thyroid cancer.