Computed tomography as a method of control of percutaneous tumor cryoablation

摘要

Purpose: to develop methodological aspects of CT navigation and control of tumor cryoablation. Methods and materials . The study included 38 patients with malignant neoplasms of different localization, who underwent 58 cryoablation procedures with CT navigation. CT control was performed in sequential mode, in the mode of CT fluoroscopy or as an part of robot-assisted operations. The accuracy of cryoprobe positioning and the possibility of visual control of the ice-ball propagation were evaluated. Results: in all cases of cryoablation the use of CT made it possible to install accurately cryoprobes in the tumor and visually control the formation of the ice-sphere. Conclusion : CT is the optimal method of image guidance for cryoablation, which allows to control both the positioning of cryoprobes in the tumor and the process of ice front propagation. Depending on the characteristics of the tumor, technical equipment and experience of the operator, one or another method of CT navigation of instruments can be chosen.