Ep. 640 Hepatic Arteriography and C-Arm CT-Guided Liver Ablation with Dr. M.L.J. Smits

When a liver tumor is hard to see, the limits of conventional image guidance can become the limits of treatment. In this episode of the BackTable Podcast, Netherlands interventional oncologist Dr. Maarten (M.L.J.) Smits shares a step-by-step walkthrough of the new hepatic arteriography and C-arm CT–guided ablation (HepACAGA) technique, punctuated with a real-world case series at the end. Find out how intra-arterial contrast, cone-beam CT, and 3D needle guidance can improve tumor conspicuity, targeting accuracy, and ablation margin assessment within a single angiography suite. --- Get the BackTable apphttps://www.backtable.com/app --- Timestamps 00:00 - Introduction02:55 - Netherlands Tech Access04:31 - Origin of HepACAGA07:14 - Why Use a Catheter?11:24 - Tools and Setup13:13 - Catheters and Devices17:06 - Contrast Protocol Basics22:51 - Targeting and Needle Guidance31:09 - Patient Selection35:56 - Extra Benefits and Multimodal39:58 - Workflow and Outcomes46:14 - Evidence and Early Studies51:41 - Rethinking Size Cutoffs57:54 - HCC Case Walkthrough01:02:27 - Hard-to-See Metastasis01:06:22 - Margin Driven Reablation01:11:04 - Bleeding and Embolization01:16:05 - Renal ACAGA Expansion01:23:31 - Adoption and Next Steps --- More about this episode Dr. Smits explains the origins of HepACAGA and why catheter-based contrast delivery can meaningfully change ablation planning, particularly for small lesions, poorly visualized tumors, and cases where ultrasound or conventional CT guidance may be insufficient. He walks through the practical setup, including catheter positioning, contrast dilution, timing protocols, needle navigation, apnea/end-expiration technique, and built-in fusion for immediate ablation verification. He also describes how the angio suite environment supports multimodal treatment, including intraprocedural embolization when bleeding occurs or when additional transarterial therapy is needed. The episode also examines early outcomes from Dr. Smits’ group, including a reported reduction in local recurrence from approximately 25% to 5%, with a modest increase in procedure time. Case examples include HCC, small colorectal liver metastases, margin-driven re-ablation, hemorrhage management, and extension of the ACAGA concept to renal tumors (RenACAGA). --- Resources Hepatic Arteriography and C-Arm CT-Guided Ablation (HepACAGA) to Improve Tumor Visualization, Navigation and Margin Confirmation in Percutaneous Liver Tumor Ablationhttps://pubmed.ncbi.nlm.nih.gov/37704863/ Renal Arteriography and C-arm CT-Guided Ablation (RenACAGA) for Thermal Ablation of Challenging Renal Tumorshttps://pubmed.ncbi.nlm.nih.gov/40295401/ --- BackTable Vascular & Interventional (VI) is the go-to podcast for interventional radiologists, vascular surgeons, and interventional cardiologists. Download the free BackTable app to get early access to new episodes, cases, and courses curated by physicians in your specialty. ► https://www.backtable.com/app