Meeting Banner
Abstract #1817

Reference-Based Realtime Temperature and Damage Estimate Maps for Monitoring Laser Ablation of Hepatic Tumors Under MRI

Anil Shetty1, Hiroumi Kitajima2, 3, Tracy E. Powell2, 3, Michael A. Bowen2, 3, Sherif G. Nour2, 3

1Visualase Inc, Houston, TX, United States; 2Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, United States; 3Interventional MRI Program, Emory University Hospital, Atlanta, GA, United States

This report demonstrated the feasibility of percutaneous laser ablation for hepatic tumors with real-time MRI monitoring within a dedicated interventional MRI suite. The online feedback of the ablation, along with combination of multiple fibers and pullbacks, allowed creation of large ablation volumes. The real-time monitoring, along with automatic shutoff mechanism with triggering of safety limits, protected adjacent critical structures. Advantages of using MR guided laser ablation include ability to ablate lesions which are in locations that are difficult to access and ability to ablate lesions which are only conspicuous on certain MR weighted sequences.

Keywords

ability ablate ablation ablations ablative aborted accounted acquisition acutely addition administrated affected allowed applying association automatic automatically bladder brain breath cardiac catheter clicking clinical coded color completion complications comprised computed computer confirmation connection consisted cooled cooling core correction coverage creation critical cumulative cycle cylindrical damage deactivate decision deemed destruction difficult done duration enabled energy environment established evaluate evaluated exceeded exposure feasibility feedback fiber fibers gadolinium gall heart hepatic history hold hospital immediately include induced interfaces interstitial invasive laser lasers lesion lesions like limit limits location lung making maps mechanism micrometers microwave minute monitoring motion near none organs panel patients percutaneous placement placements position post predictions prescribed procedure process produce profile protected proton reaching real reconstructed repeat report repositioning reproducible required retrieved robust safety scanner sciences shutoff silica simultaneous soon stages stiffener structures success system target targeted team temperature therapy thermal thermometry thin titanium treatment triggering tumor tumors vessels vibe workstation zones