P Saccomandi1, E Schena2, C Massaroni3, Y Fong4, R F Grasso5, F Giurazza6, B Beomonte Zobel7, X Buy8, J Palussiere9, R L Cazzato10. 1. Unit of Measurements and Biomedical Instrumentation, Center for Integrated Research, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: p.saccomandi@unicampus.it. 2. Unit of Measurements and Biomedical Instrumentation, Center for Integrated Research, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: e.schena@unicampus.it. 3. Unit of Measurements and Biomedical Instrumentation, Center for Integrated Research, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: c.massaroni@unicampus.it. 4. Department of Surgery, City of Hope, Duarte-Main Campus, 1500 East Duarte Road, Duarte, CA 91010, USA. Electronic address: y.fong@coh.org. 5. Unit of Radiology, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: r.grasso@unicampus.it. 6. Unit of Radiology, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: f.giurazza@unicampus.it. 7. Unit of Radiology, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: b.zobel@unicampus.it. 8. Department of Radiology, Institut Bergonié, 229 Cours de l'Argonne, 33076 Bordeaux Cedex, France. Electronic address: x.buy@bordeaux.unicancer.fr. 9. Department of Radiology, Institut Bergonié, 229 Cours de l'Argonne, 33076 Bordeaux Cedex, France. Electronic address: j.palussiere@bordeaux.unicancer.fr. 10. Unit of Radiology, Università Campus Bio-Medico di Roma, Via Álvaro del Portillo, 21, Rome 00128, Italy. Electronic address: r.cazzato@unicampus.it.
Abstract
OBJECTIVE: The aim of the present study was to assess the temperature map and its reproducibility while applying two different MWA systems (915 MHz vs 2.45 GHz) in ex vivo porcine livers. MATERIALS AND METHODS: Fifteen fresh pig livers were treated using the two antennae at three different settings: treatment time of 10 min and power of 45 W for both systems; 4 min and 100 W for the 2.45 GHz system. Trends of temperature were recorded during all procedures by means of fiber optic-based probes located at five fixed distances from the antenna, ranging between 10 mm and 30 mm. Each trial was repeated twice to assess the reproducibility of temperature distribution. RESULTS: Temperature as function of distance from the antenna can be modeled by a decreasing exponential trend. At the same settings, temperature obtained with the 2.45 GHz system was higher than that obtained with the 915 MHz thus resulting into a wider area of ablation (diameter 17 mm vs 15 mm). Both systems showed good reproducibility in terms of temperature distribution (root mean squared difference for both systems ranged between 2.8 °C and 3.4 °C). CONCLUSIONS: When both MWA systems are applied, a decreasing exponential model can predict the temperature map. The 2.45 GHz antenna causes higher temperatures as compared to the 915 MHz thus, resulting into larger areas of ablation. Both systems showed good reproducibility although better results were achieved with the 2.45 GHz antenna.
OBJECTIVE: The aim of the present study was to assess the temperature map and its reproducibility while applying two different MWA systems (915 MHz vs 2.45 GHz) in ex vivo porcine livers. MATERIALS AND METHODS: Fifteen fresh pig livers were treated using the two antennae at three different settings: treatment time of 10 min and power of 45 W for both systems; 4 min and 100 W for the 2.45 GHz system. Trends of temperature were recorded during all procedures by means of fiber optic-based probes located at five fixed distances from the antenna, ranging between 10 mm and 30 mm. Each trial was repeated twice to assess the reproducibility of temperature distribution. RESULTS: Temperature as function of distance from the antenna can be modeled by a decreasing exponential trend. At the same settings, temperature obtained with the 2.45 GHz system was higher than that obtained with the 915 MHz thus resulting into a wider area of ablation (diameter 17 mm vs 15 mm). Both systems showed good reproducibility in terms of temperature distribution (root mean squared difference for both systems ranged between 2.8 °C and 3.4 °C). CONCLUSIONS: When both MWA systems are applied, a decreasing exponential model can predict the temperature map. The 2.45 GHz antenna causes higher temperatures as compared to the 915 MHz thus, resulting into larger areas of ablation. Both systems showed good reproducibility although better results were achieved with the 2.45 GHz antenna.
Authors: E Schena; P Saccomandi; F Giurazza; M A Caponero; L Mortato; F M Di Matteo; F Panzera; R Del Vescovo; B Beomonte Zobel; S Silvestri Journal: Phys Med Biol Date: 2013-07-31 Impact factor: 3.609
Authors: U Leung; D Kuk; M I D'Angelica; T P Kingham; P J Allen; R P DeMatteo; W R Jarnagin; Y Fong Journal: Br J Surg Date: 2014-10-09 Impact factor: 6.939
Authors: Meghan G Lubner; Christopher L Brace; Tim J Ziemlewicz; J Louis Hinshaw; Fred T Lee Journal: Semin Intervent Radiol Date: 2013-03 Impact factor: 1.513
Authors: Thomas J Vogl; Andrei Roman; Nour-Eldin A Nour-Eldin; Wolfgang Hohenforst-Schmidt; Iliana Bednarova; Benjamin Kaltenbach Journal: Diagn Interv Radiol Date: 2018 Jan-Feb Impact factor: 2.630
Authors: Elena De De Vita; Martina Zaltieri; Francesca De De Tommasi; Carlo Massaroni; Eliodoro Faiella; Bruno Beomonte Zobel; Agostino Iadicicco; Emiliano Schena; Rosario Francesco Grasso; Stefania Campopiano Journal: Sensors (Basel) Date: 2020-06-04 Impact factor: 3.576