Print Email Facebook Twitter Intraprocedural assessment of ablation margins using computed tomography co-registration in hepatocellular carcinoma treatment with percutaneous ablation Title Intraprocedural assessment of ablation margins using computed tomography co-registration in hepatocellular carcinoma treatment with percutaneous ablation: IAMCOMPLETE study Author Hendriks, P. (Leiden University Medical Center) van Dijk, Kiki M. (Leiden University Medical Center) Boekestijn, Bas (Leiden University Medical Center) Broersen, Alexander (Leiden University Medical Center) van Duijn-de Vreugd, Jacoba J. (Leiden University Medical Center) Coenraad, Minneke J. (Leiden University Medical Center) Dijkstra, J. (Leiden University Medical Center) de Geus-Oei, L.F. (TU Delft RST/Radiation, Science and Technology; Leiden University Medical Center; University of Twente) Burgmans, M.C. (Leiden University Medical Center) Department RST/Radiation, Science and Technology Date 2023 Abstract Purpose: The primary objective of this study was to determine the feasibility of ablation margin quantification using a standardized scanning protocol during thermal ablation (TA) of hepatocellular carcinoma (HCC), and a rigid registration algorithm. Secondary objectives were to determine the inter- and intra-observer variability of tumor segmentation and quantification of the minimal ablation margin (MAM). Materials and methods: Twenty patients who underwent thermal ablation for HCC were included. There were thirteen men and seven women with a mean age of 67.1 ± 10.8 (standard deviation [SD]) years (age range: 49.1–81.1 years). All patients underwent contrast-enhanced computed tomography examination under general anesthesia directly before and after TA, with preoxygenated breath hold. Contrast-enhanced computed tomography examinations were analyzed by radiologists using rigid registration software. Registration was deemed feasible when accurate rigid co-registration could be obtained. Inter- and intra-observer rates of tumor segmentation and MAM quantification were calculated. MAM values were correlated with local tumor progression (LTP) after one year of follow-up. Results: Co-registration of pre- and post-ablation images was feasible in 16 out of 20 patients (80%) and 26 out of 31 tumors (84%). Mean Dice similarity coefficient for inter- and intra-observer variability of tumor segmentation were 0.815 and 0.830, respectively. Mean MAM was 0.63 ± 3.589 (SD) mm (range: -6.26–6.65 mm). LTP occurred in four out of 20 patients (20%). The mean MAM value for patients who developed LTP was -4.00 mm, as compared to 0.727 mm for patients who did not develop LTP. Conclusion: Ablation margin quantification is feasible using a standardized contrast-enhanced computed tomography protocol. Interpretation of MAM was hampered by the occurrence of tissue shrinkage during TA. Further validation in a larger cohort should lead to meaningful cut-off values for technical success of TA. Subject Ablation marginComputed tomographyHepatocellular carcinomaImage processingThermal ablation To reference this document use: http://resolver.tudelft.nl/uuid:37b1d8f9-2ef4-4e22-be7e-1a7c0e553d7c DOI https://doi.org/10.1016/j.diii.2023.07.002 Source Diagnostic and Interventional Imaging, 105 (2), 57-64 Part of collection Institutional Repository Document type journal article Rights © 2023 P. Hendriks, Kiki M. van Dijk, Bas Boekestijn, Alexander Broersen, Jacoba J. van Duijn-de Vreugd, Minneke J. Coenraad, J. Dijkstra, L.F. de Geus-Oei, M.C. Burgmans, More Authors Files PDF 1-s2.0-S221156842300150X-main.pdf 1.44 MB Close viewer /islandora/object/uuid:37b1d8f9-2ef4-4e22-be7e-1a7c0e553d7c/datastream/OBJ/view