Assessment of ablation zone of liver tumor by 3DUS-US fusion imaging based on electromagnetic positioning:an experimental study
10.3760/cma.j.issn.1004-4477.2017.09.014
- VernacularTitle:基于磁定位三维超声-超声单模态融合成像技术评估肝肿瘤消融范围的实验研究
- Author:
Shumin LYU
1
;
Rongli LIAN
;
Yinglin LONG
;
Zhongzhen SU
;
Rongqin ZHENG
;
Erjiao XU
Author Information
1. 中山大学附属第三医院超声科 广东省肝脏疾病研究重点实验室
- Keywords:
Ultrasonography;
Ablation techniques;
Image fusion;
Electromagnetic positioning
- From:Chinese Journal of Ultrasonography
2017;26(9):803-807
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility and accuracy of three-dimensional ultrasound-ultrasound(3DUS-US)fusion imaging based on electromagnetic positioning in the assessment of ablation zone of liver tumor through experimental study in phantom models.Methods Sixteen phantom models which could be ablated and used to assess the ablation zone were established.Then,they were ablated and divided into complete ablation group(n =8)and incomplete ablation group(n =8)randomly.Their ablation effects were assessed by 3DUS-US fusion imaging.If the tumor model was assessed as incomplete ablation,the maximum thickness of the residual tumor was measured.The assessments of gross specimen were used as golden standard to validate the feasibility and accuracy of assessment of 3DUS-US fusion imaging.The success rate of registration,duration time of fusion imaging,accuracy rate of assessment and measurement error in incomplete ablation group were recorded.Results All of the 16 phantom models were produced successfully.The success rate of registration was 100% and the duration time of 3DUS-US fusion imaging was(3.9±1.0)min.The accuracy rate of assessment was 100%.There was no significant difference between the assessment of residual tumor thickness in incomplete ablation group by 3DUS-US fusion imaging and gross specimen(t=-0.814,P =0.442),and the measurement error was(1.1±0.6) mm.Conclusions 3DUS-US fusion imaging based on electromagnetic positioning is a feasible,accurate and convenient method in the assessment of ablation zone of liver tumor.It would be a new immediate precise assessment method during ablation procedure for liver tumor.
