Dr. Weiming Zhai Profile

Dr. Weiming Zhai

Research Scientist at Tsinghua Univ

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Proceedings Article | 2 March 2011 Paper

Computer assisted intervention surgery planning and navigation for percutaneous microwave ablation of lung cancer

Weiming Zhai, Lin Sheng, Yixu Song, Hong Wang, Yannan Zhao, Peifa Jia

Proceedings Volume 7964, 796406 (2011) https://doi.org/10.1117/12.877345

KEYWORDS: Surgery, Microwave radiation, Tumors, Computed tomography, Lung, Lung cancer, Navigation systems, Visualization, Volume rendering, 3D modeling

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Microwave ablation is a promising option in lung cancer therapy. However, it's rarely used in percutaneous lung cancer therapy compared to liver cancer, because the presence of a large amount of air within the lung creates significant back shadowing artifacts that preclude adequate delineation of anatomic details on sonography. To utilize microwave ablation in malignant lung tumor therapy, we developed a novel percutaneous intervention surgery navigation system (CAINS-I), which capitalizes on using computer assisted technology to help lung cancer patients whose condition are not amenable to surgical resection, sonographic guidance and intraoperative CT surgery. In these surgeries, preoperative CT images with patient respiration state are first acquired, which are then visualized using GPU-accelerated volume rendering. The optimal surgery trajectories are then planned based on 3D thermal field computation and surgery simulation in the surgery planning software. During the surgery, the patient breath is control by a portable volume ventilator system which could limit the movement and displacement of the tumor. Then the microwave probe is punctured into the tumor according to the dynamic respiratory state and the tumor is ablated by microwave energy. After the surgery, postoperative CT are acquired and compared to the preoperative CT, and the surgery is evaluated by compare preoperative and postoperative CT images. The development of this technique represented an advance from the traditional ways for lung cancer therapy and significantly extends the indications of microwave ablation.

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