Comparison of shear wave elastography and quasi-static elastography in the evaluation of radiofrequency ablation:ex vivo experiment
10.3760/cma.j.issn.1004-4477.2017.04.017
- VernacularTitle:剪切波弹性成像对比准静态弹性成像评价射频消融效果的离体实验研究
- Author:
Baoxian LIU
;
Guangliang HUANG
;
Wenshuo TIAN
;
Ming XU
;
Manxia LIN
;
Xiaohua XIE
;
Xiaoyan XIE
- Keywords:
Elasticity imaging techniques;
Radiofrequency ablation;
Ex vivo experiment
- From:
Chinese Journal of Ultrasonography
2017;26(4):350-354
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of shear wave elastography (SWE) and quasi-static elastography in the evaluation of radiofrequency ablation of pork.Methods Twelve pieces of fresh pork were underwent radiofrequency ablation (RFA) with different target temperatures.Before and after RFA,conventional ultrasound (US),SWE and quasi-static elastography were conducted to visualize the boundaries of RFA zones.The size of ablation zones obtained from conventional ultrasound,SWE and quasi-static elastography measurement were observed and detected the correlativity with pathology findings.Moreover,the Young's modulus and stain ratio of ablated zone were recorded.Results Most ablated boundaries were clearly delineated by both elastography techniques,except one with a low target temperature of 70 ℃.The sizes of ablated zones measured by SWE and quasi-static elastography were closely correlated with pathological findings.However,no ablated zones could be visualized by conventional US.Before and after RFA,the mean,minimum and maximum values of Young's modulus were (24.2 ± 3.8) kPa vs (97.6 ± 29.1) kPa,(9.2 ± 0.7)kPa vs (44.5 ± 7.7)kPa and (29.9 ± 3.8)kPa vs (181.5 ± 36.7)kPa,respectively (all P ＜0.001).With the increase of target temperature of RFA,the Young's modulus values and the mean strain ratio were significantly increased (all P ＜ 0.01).Conclusions Both SWE and quasi-static elastography are useful tools for evaluating the ablation,which are superior to conventional US.Moreover,SWE can be used to monitor the procedure of ablation.
