Utility of Intra-operative Image Guidance System for Missing Metastases

Utility of Intra-operative Image Guidance System for Missing Metastases

Intraoperatively, the surgeon will interrogate the liver with ultrasound. The time spent by the surgeon using the ultrasound is recorded. If all lesions seen on pre-op imaging were found, the patient does not have the Pathfinder Explorer system applied. If one or more lesions cannot be found, then the Pathfinder Explorer system is calibrated and a tracking device is attached to the ultrasound probe, which the surgeon will use to reattempt localization of the missing tumor. The Pathfinder Explorer system operates in real-time in conjunction with the ultrasound.

Inclusion Criteria:

• patient has one or more colorectal liver metastases, at least one of which is ≤1.5cm in maximal diameter on pre-operative cross sectional imaging
• undergoing liver resection and/or ablation

Exclusion Criteria:

• none