三维扫描技术用于大腿脂肪抽吸术的分段体积量化研究

A study on quantification assessment of segmental volume after thigh liposuction with three-dimensional scanning technology

目的采用三维扫描技术对大腿脂肪抽吸术的效果进行量化客观评估。方法回顾性分析2018年1月至2022年9月,中国医学科学院整形外科医院脂肪整形科接受大腿脂肪抽吸术患者的双腿三维扫描成像数据。术前和术后随访时对患者进行三维扫描,构建双侧大腿的可视化三维模型。在三维模型中将双侧大腿从上至下每隔5 cm进行分段,共分为7个节段。测量、计算手术前后大腿整体及各节段的体积、体积变化率,以验证大腿脂肪抽吸术的有效性,计算大腿各节段的吸脂效率(EOL),并比较双侧大腿手术前后的对称性。采用配对秩和检验分析手术前后大腿的体积差异;采用组内相关系数(ICC)评估双侧大腿的对称性。结果共纳入36例女性患者,年龄为(28.6±7.6)岁(18~49岁)。术后随访23~1133 d,平均274.7 d。三维扫描成像测量结果显示,大腿整体及各节段体积在手术前后有显著变化,术后明显小于术前,差异均有统计学意义(P均<0.01),其中最上段体积变化率和EOL最高,大腿各节段的体积变化率和EOL总体呈自上而下递减趋势。无论是术前还是术后,双侧大腿各节段体积的ICC值均大于0.950,提示双腿对称性较好,且双腿整体体积的ICC由术前的0.992提高至术后的0.997。结论三维扫描技术可用于大腿体积的定量测量。该研究通过量化客观评估证实了大腿脂肪抽吸术的有效性,且大腿最上段吸脂效果最显著,术后双侧大腿对称性得到进一步改善。

Objective To investigate the quantification assessment of segmental volume after thigh liposuction utilizing three-dimensional(3D)scanning technology.Methods This retrospective study was performed with the analysis of 3D scanning images of patients who had undergone bilateral thigh liposuction in Body Contouring&Fat Grafting Center,Plastic Surgery Hospital,Chinese Academy of Medical Sciences from January 2018 to September 2022.Preoperative and postoperative 3D scanning were performed to build visual 3D models of bilateral thighs.From top to the bottom,bilateral thighs were segmented into seven sections with a space of 5 cm in acquired 3D model.Certain measurements and calculation of preoperative and postoperative volume and volume change rate of the overall thigh and each segment were conducted,to validate the efficiency of liposuction(EOL).Additionally,EOL of each thigh segment was computed and the symmetry of bilateral thighs was analyzed before and after surgery.The volume differences were computed using the paired Wilcoxon rank-sum test,and intraclass correlation coefficient(ICC)was exerted to assess the symmetry of bilateral thighs before and after surgery.Results A total of 36 female patients were included in the study,with an age range of 18 to 49 years and a mean age of(28.6±7.6)years.Follow-up duration ranged from 23 to 1133 days postoperatively,with a mean follow-up period of 274.7 days.The results of 3D scanning measurements indicated significant changes(P<0.01)in both the overall volume of the thigh and the volumes of each segment before and after surgery.The highest volume change rate and EOL were observed in the uppermost segment,and the volumetric change rate and EOL exhibited a descending trend across the segments of the thigh from the uppermost to the lowermost segments.The ICC of the volume of each segment consistently surpassed 0.950 whether preoperatively or postoperatively,indicating a high level of symmetry between the bilateral thighs,and the ICC of overall volume showed a notable increase from 0.992 preoperatively to 0.997 postoperatively.Conclusion 3D scanning technology can be exerted to quantify the volume changes before and after thigh liposuction.This study provided quantitative and objective evidence to confirm the efficacy of thigh liposuction procedure,elucidating that the most significant liposuction effects observed in the uppermost segment of the thigh.Moreover,postoperative assessments reveal a further enhancement in bilateral thigh symmetry.