OBJECTIVE: To compare temperature curve and ablation zone between 915- and 2450-MHz cooled-shaft microwave antenna in ex vivo porcine livers. MATERIALS AND METHODS: The 915- and 2450-MHz microwave ablation and thermal monitor system were used in this study. A total of 56 ablation zones and 280 temperature data were obtained in ex vivo porcine livers. The output powers were 50, 60, 70, and 80 W and the setting time was 600 s. The temperature curve of every temperature spot, the short- and long-axis diameters of the coagulation zones were recorded and measured. RESULTS: At all four power output settings, the peak temperatures of every temperature spot had a tendency to increase accordingly as the MW output power was increased, and except for 5mm away from the antenna, the peak temperatures for the 915 MHz cooled-shaft antenna were significantly higher than those for the 2450 MHz cooled-shaft antenna (p<0.05). Meanwhile, the short- and long-axis diameters for the 915 MHz cooled-shaft antenna were significantly larger than those for the 2450 MHz cooled-shaft antenna (p<0.05). CONCLUSION: The 915 MHz cooled-shaft antenna can yield a significantly larger ablation zone and achieve higher temperature in ablation zone than a 2450 MHz cooled-shaft antenna in ex vivo porcine livers.
OBJECTIVE: To compare temperature curve and ablation zone between 915- and 2450-MHz cooled-shaft microwave antenna in ex vivo porcine livers. MATERIALS AND METHODS: The 915- and 2450-MHz microwave ablation and thermal monitor system were used in this study. A total of 56 ablation zones and 280 temperature data were obtained in ex vivo porcine livers. The output powers were 50, 60, 70, and 80 W and the setting time was 600 s. The temperature curve of every temperature spot, the short- and long-axis diameters of the coagulation zones were recorded and measured. RESULTS: At all four power output settings, the peak temperatures of every temperature spot had a tendency to increase accordingly as the MW output power was increased, and except for 5mm away from the antenna, the peak temperatures for the 915 MHz cooled-shaft antenna were significantly higher than those for the 2450 MHz cooled-shaft antenna (p<0.05). Meanwhile, the short- and long-axis diameters for the 915 MHz cooled-shaft antenna were significantly larger than those for the 2450 MHz cooled-shaft antenna (p<0.05). CONCLUSION: The 915 MHz cooled-shaft antenna can yield a significantly larger ablation zone and achieve higher temperature in ablation zone than a 2450 MHz cooled-shaft antenna in ex vivo porcine livers.
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: P Saccomandi; E Schena; C Massaroni; Y Fong; R F Grasso; F Giurazza; B Beomonte Zobel; X Buy; J Palussiere; R L Cazzato Journal: Eur J Surg Oncol Date: 2015-09-25 Impact factor: 4.424
Authors: Jason Chiang; Sohan Birla; Mariajose Bedoya; David Jones; Jeyam Subbiah; Christopher L Brace Journal: IEEE Trans Biomed Eng Date: 2014-10-15 Impact factor: 4.538
Authors: H Petra Kok; Erik N K Cressman; Wim Ceelen; Christopher L Brace; Robert Ivkov; Holger Grüll; Gail Ter Haar; Peter Wust; Johannes Crezee Journal: Int J Hyperthermia Date: 2020 Impact factor: 3.914
Authors: Camilo Correa-Gallego; Yuman Fong; Mithat Gonen; Michael I D'Angelica; Peter J Allen; Ronald P DeMatteo; William R Jarnagin; T Peter Kingham Journal: Ann Surg Oncol Date: 2014-06-03 Impact factor: 5.344