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目的提出一种新的基于规则化位移场的弹性减影成像方法,探讨其在消融损伤成像监控中应用的可行性。方法分别进行有限元仿真和离体实验研究,对压缩量不同情况下的位移场进行规整化和减影处理,处理后的位移场在深度方向进行微分获得弹性减影图像。结果仿真和离体实验数据显示,在消融治疗中,基于规则化位移场的弹性减影成像在压缩量变化的情况下,可获得效果较好的弹性图像,比传统弹性成像更好地反映了损伤区域的情况。结论基于规则化位移场的弹性减影成像方法实现压缩量不同情况下的弹性减影成像,优于传统弹性成像方法,可以用于消融治疗的损伤监控。
OBJECTIVE: To propose a new elastic subtraction imaging method based on a regular displacement field and to explore its feasibility in the monitoring of ablation injury imaging. Methods The finite element simulation and in vitro experiment were carried out respectively. The displacement field under different compression magnitudes was normalized and subtracted. The processed displacement field was differentiated in the depth direction to obtain the elastic subtraction image. The results of simulation and in vitro experimental data show that in the ablation treatment, the elastic subtraction imaging based on the normalized displacement field can obtain the better elastic images under the condition of the change of the compression amount, which is better than the traditional elastic imaging Damage to the area of the situation. Conclusion Elastic subtraction imaging based on regularized displacement field can achieve elastic subtraction imaging under different compression magnitudes, which is superior to traditional elastic imaging and can be used to monitor the injury of ablation.