AIM: To demonstrate the usefulness of the computed tomography (CT) fusion imaging for the evaluation of treatment effect of radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC). METHODS: Eighty-five patients with 94 HCC with complete ablation judged on conventional side-by-side interpretation of pre-RFA and post-RFA CT at the time of RFA were included in this retrospective study. CT data was retrospectively used to create fusion images of pre-RFA and post-RFA CT using automatic rigid registration and manual correction referring to intrahepatic structures and hepatic contours around a tumor. Clinical factors including a minimal ablative margin (MAM) measured on fusion images were examined to prove risk factors for local tumor progression (LTP). RESULTS: LTP was observed in 13 (13.8%) tumors with a median follow up of 21.0 months (range, 2-75). The mean MAM on the fusion image was 1.4 ± 3.1 mm and 23 tumors (24.5%) were judged to be protruding from the ablation zone. Multivariate analysis revealed that protruding from the ablation zone was the only significant factor for LTP (hazard ratio, 7.09; 95% confidential interval, 2.26-22.3; P < 0.001). CONCLUSION: Some HCC were assessed as incomplete ablation on the CT fusion images, although considered completely ablated on side-by-side images at the time of treatment, and incomplete ablation was revealed to be the only independent risk factor for LTP. The CT fusion imaging enables quantitative and accurate evaluation of treatment effect of RFA.
AIM: To demonstrate the usefulness of the computed tomography (CT) fusion imaging for the evaluation of treatment effect of radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC). METHODS: Eighty-five patients with 94 HCC with complete ablation judged on conventional side-by-side interpretation of pre-RFA and post-RFA CT at the time of RFA were included in this retrospective study. CT data was retrospectively used to create fusion images of pre-RFA and post-RFA CT using automatic rigid registration and manual correction referring to intrahepatic structures and hepatic contours around a tumor. Clinical factors including a minimal ablative margin (MAM) measured on fusion images were examined to prove risk factors for local tumor progression (LTP). RESULTS: LTP was observed in 13 (13.8%) tumors with a median follow up of 21.0 months (range, 2-75). The mean MAM on the fusion image was 1.4 ± 3.1 mm and 23 tumors (24.5%) were judged to be protruding from the ablation zone. Multivariate analysis revealed that protruding from the ablation zone was the only significant factor for LTP (hazard ratio, 7.09; 95% confidential interval, 2.26-22.3; P < 0.001). CONCLUSION: Some HCC were assessed as incomplete ablation on the CT fusion images, although considered completely ablated on side-by-side images at the time of treatment, and incomplete ablation was revealed to be the only independent risk factor for LTP. The CT fusion imaging enables quantitative and accurate evaluation of treatment effect of RFA.
Authors: Muneeb Ahmed; Luigi Solbiati; Christopher L Brace; David J Breen; Matthew R Callstrom; J William Charboneau; Min-Hua Chen; Byung Ihn Choi; Thierry de Baère; Gerald D Dodd; Damian E Dupuy; Debra A Gervais; David Gianfelice; Alice R Gillams; Fred T Lee; Edward Leen; Riccardo Lencioni; Peter J Littrup; Tito Livraghi; David S Lu; John P McGahan; Maria Franca Meloni; Boris Nikolic; Philippe L Pereira; Ping Liang; Hyunchul Rhim; Steven C Rose; Riad Salem; Constantinos T Sofocleous; Stephen B Solomon; Michael C Soulen; Masatoshi Tanaka; Thomas J Vogl; Bradford J Wood; S Nahum Goldberg Journal: J Vasc Interv Radiol Date: 2014-10-23 Impact factor: 3.464
Authors: Serena Carriero; Gianmarco Della Pepa; Lorenzo Monfardini; Renato Vitale; Duccio Rossi; Andrea Masperi; Giovanni Mauri Journal: Diagnostics (Basel) Date: 2021-03-19