肝腫瘍RFA・HIFU治療を対象とした磁気センサを必要としない超音波治療効果判定支援システム

抄録

Minimally invasive liver tumor therapies such as RFA and HIFU require treatment efficacy evaluation after treatment. Recently, 3D model-based methods using magnetic sensors have been proposed. However, magnetic sensors have problems in terms of accuracy and cost, so a method that does not require them is needed. In this paper, we propose a new method that uses blood vessels as positioning indicators. Before surgery, 3D models of blood vessels and tumors are constructed using the robotic ultrasound diagnosis system. After surgery, the 3D model and postoperative ultrasound image are registered only with the blood vessels, and the preoperative tumor position is marked. Experiments showed that rough positioning was possible when the blood vessels were used as markers, and the accuracy of the preoperative tumor marking was almost satisfactory for clinical use.