Fig. 2

Selection of the puncture pathway under the guidance of an ultrasonography (US)/computer tomography (CT) imaging fusion system. a The US/CT imaging fusion system consists of a magnetic sensor-loaded ultrasonic detector, magnetic generator, and magnetic receiver, and the images of the liver are used for initial calibration. b The integrated image is displayed on the screen, puncture pathway (left midaxillary line) is indicated by red lines, walled-off necrosis (retroperitoneal area behind the colon) is indicated by red triangles, and the left ilium is indicated by red arrows