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Insights into Imaging
Fig. 1 | Insights into Imaging

Fig. 1

From: Triple guidance of choledochoscopy, ultrasonography, and computed tomography facilitates percutaneous catheter drainage of infected walled-off necrosis

Fig. 1

Schematic of the modified percutaneous catheter drainage procedure under the triple guidance of choledochoscopy, ultrasonography (US), and computed tomography (CT). a A laparoscopic trocar is inserted into the necrotic cavity under the guidance of an US/CT imaging system. b After the withdrawal of the core, a choledochoscope is inserted through the trocar to detect the necrotic cavity and to debride the necrosis if needed. c Under the triple-guidance system, the guidewire is placed at the sloping position of the walled-off necrosis (WON), penetrating the necrotic cavity. d A multi-side-hole catheter is then inserted along the guidewire to drain the WON

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