Fourat Ridouani1, R Michael Tuttle2, Mario Ghosn1, Duan Li1, Richard J Wong2, James A Fagin2, Sebastien Monette3, Stephen B Solomon1, Juan C Camacho4. 1. Interventional Radiology Service, Department of Radiology, Weill-Cornell Medical College, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, Howard 118, New York 10065, T 212 639 2209, New York, NY, USA. 2. Head and Neck Cancer and Endocrinology Services, Memorial Sloan Kettering Cancer Center, New York, NY, USA. 3. Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA. 4. Interventional Radiology Service, Department of Radiology, Weill-Cornell Medical College, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, Howard 118, New York 10065, T 212 639 2209, New York, NY, USA. camachoj@mskcc.org.
Abstract
BACKGROUND: To compare laser ablation (LA) zone dimensions at two predetermined energy parameters to cover a theoretical 10 mm zone + 2 mm margin in a thyroid swine model. METHODS: Approval of the Institutional Animal Care and Use Committee was obtained. After hydrodissection, an ultrasound-guided LA (Elesta Echolaser X4 with Orblaze technology, 1064 nm) was performed in the periphery of the thyroid in 10 swine. Two cohorts were established to ablate a region of 10mm diameter with 2mm margin based on manufacturer's ex vivo data (n= 5 at 3W/1400J and n= 5 at 3W/1800J). The ablation zone was measured on contrast-enhanced computed tomography (CT) and compared to the pathological specimen. Euthanasia was performed 48 hours following ablation. RESULTS: All ablations in the 3W/1800J group achieved a diameter of 12 mm ± 1 mm in three dimensions. In the 3W/1400J group, 1 ablation reached 12 mm ± 1 mm in 2 dimensions and 4 ablations reached this size in one dimension. Maximum diameter was higher in the 3W/1800J compared to the 3W/1400J group, both on histology (1.46 cm ± 0.05 vs. 1.1 cm ± 0.0, p< 0.01) and CT (1.52 cm ± 0.04 vs. 1.18 cm ± 0.04, p< 0.01). Similar results were obtained regarding volumes, both on histology (1.12 mL ± 0.13 vs. 0.57 mL ± 0.06, p< 0.01) and CT (1.24 mL ± 0.13 vs. 0.59 mL ± 0.07, p< 0.01). Histology showed coagulation necrosis and correlated well with CT measurements. CONCLUSION: Optimal parameters to obtain a LA zone of 10 mm with 2 mm margin utilizing a single needle are 3W/1800J.
BACKGROUND: To compare laser ablation (LA) zone dimensions at two predetermined energy parameters to cover a theoretical 10 mm zone + 2 mm margin in a thyroid swine model. METHODS: Approval of the Institutional Animal Care and Use Committee was obtained. After hydrodissection, an ultrasound-guided LA (Elesta Echolaser X4 with Orblaze technology, 1064 nm) was performed in the periphery of the thyroid in 10 swine. Two cohorts were established to ablate a region of 10mm diameter with 2mm margin based on manufacturer's ex vivo data (n= 5 at 3W/1400J and n= 5 at 3W/1800J). The ablation zone was measured on contrast-enhanced computed tomography (CT) and compared to the pathological specimen. Euthanasia was performed 48 hours following ablation. RESULTS: All ablations in the 3W/1800J group achieved a diameter of 12 mm ± 1 mm in three dimensions. In the 3W/1400J group, 1 ablation reached 12 mm ± 1 mm in 2 dimensions and 4 ablations reached this size in one dimension. Maximum diameter was higher in the 3W/1800J compared to the 3W/1400J group, both on histology (1.46 cm ± 0.05 vs. 1.1 cm ± 0.0, p< 0.01) and CT (1.52 cm ± 0.04 vs. 1.18 cm ± 0.04, p< 0.01). Similar results were obtained regarding volumes, both on histology (1.12 mL ± 0.13 vs. 0.57 mL ± 0.06, p< 0.01) and CT (1.24 mL ± 0.13 vs. 0.59 mL ± 0.07, p< 0.01). Histology showed coagulation necrosis and correlated well with CT measurements. CONCLUSION: Optimal parameters to obtain a LA zone of 10 mm with 2 mm margin utilizing a single needle are 3W/1800J.
Authors: Omid Khalilzadeh; Mark O Baerlocher; Paul B Shyn; Bairbre L Connolly; A Michael Devane; Christopher S Morris; Alan M Cohen; Mehran Midia; Raymond H Thornton; Kathleen Gross; Drew M Caplin; Gunjan Aeron; Sanjay Misra; Nilesh H Patel; T Gregory Walker; Gloria Martinez-Salazar; James E Silberzweig; Boris Nikolic Journal: J Vasc Interv Radiol Date: 2017-07-27 Impact factor: 3.464
Authors: E Tanis; B Nordlinger; M Mauer; H Sorbye; F van Coevorden; T Gruenberger; P M Schlag; C J A Punt; J Ledermann; T J M Ruers Journal: Eur J Cancer Date: 2014-01-07 Impact factor: 9.162