CAJ | 학술논문

目的比较水冷915 MHz和2450 MHz微波在活体与离体猪肝实验中温度曲线和消融区的差异.方法使用915和2450 MHz微波消融和热监测系统,共获得58个消融区和180个温度数据.输出设置为915 MHz 50 W,70 W和2450 MHz 50 W,70 W,并设置时间为600 s.每个温度点的温度曲线在天线旁开5、10、15 mm处,对消融区的宽径和长径进行测量.结果在活体与离体实验中,除旁开5 mm,915 MHz水冷微波其余点的峰值温度[活体50 W 10 mm:(59±4.26)℃；70 W 10 mm:(67±9.01)℃]均高于2450 MHz微波[活体50 W 10 mm:(54±4.09)℃；70 W 10 mm:(57±6.13)℃](P＜0.05).在相同条件下,离体肝脏的消融区宽径和长径[活体50W宽径:(3.13±0.76)cm;长径(4.95±0.87)cm]均显着大于2450 MHz微波[活体50 W宽径:(2.34±0.49)cm；长径(3.43±0.96)cm](P＜ 0.05).结论在离体和活体的肝脏实验中,915 MHz水冷微波比2450 MHz可以形成更大的消融区和达到更高的温度.
목적 비교수랭915 MHz화2450 MHz미파재활체여리체저간실험중온도곡선화소융구적차이.방법 사용915화2450 MHz미파소융화열감측계통,공획득58개소융구화180개온도수거.수출설치위915 MHz 50 W,70 W화2450 MHz 50 W,70 W,병설치시간위600 s.매개온도점적온도곡선재천선방개5、10、15 mm처,대소융구적관경화장경진행측량.결과 재활체여리체실험중,제방개5 mm,915 MHz수랭미파기여점적봉치온도[활체50 W 10 mm:(59±4.26)℃；70 W 10 mm:(67±9.01)℃]균고우2450 MHz미파[활체50 W 10 mm:(54±4.09)℃；70 W 10 mm:(57±6.13)℃](P＜0.05).재상동조건하,리체간장적소융구관경화장경[활체50W관경:(3.13±0.76)cm;장경(4.95±0.87)cm]균현착대우2450 MHz미파[활체50 W관경:(2.34±0.49)cm；장경(3.43±0.96)cm](P＜ 0.05).결론 재리체화활체적간장실험중,915 MHz수랭미파비2450 MHz가이형성경대적소융구화체도경고적온도.
Objective To compare temperature curve and ablation zone between 915 and 2450 MHz cooled-shaft microwave antenna for porcine livers in vivo and in vitro.Methods The 915 and 2450 MHz microwave ablation and thermal monitor system were used in this study.A total of 58 ablation zones and 180 temperature data were obtained from porcine livers in vivo and in vitro.The output settings were 915 MHz 50 W,70 W and 2450 MHz 50 W,70 W,and the setting time was 600 s.The temperature curve of every temperature spot was at 5,10,15 mm away from the antenna,and the short-and long-axis diameters of the coagulation zones were measured.Results The peak temperatures for the 915 MHz cooled-shaft antenna[in vivo 50 W 10 mm:(59±4.26)℃ ; 70 W 10 mm:(67±9.01)℃] were significantly higher than those for the 2450 MHz cooled-shaft antenna [in vivo 50 W 10 mm:(54±4.09)℃ ; 70 W 10 mm:(57±6.13)℃] in both in vitro and in vivo livers except for 5 mm away from the antenna in vitro liver(P＜0.05).Meanwhile,the shortand long-axis diameters for the 915 MHz cooled-shaft antenna[in vivo 50 W short-axis:(3.13±0.76)cm; long-axis (4.95±0.87)cm] were significantly larger than those for the 2450 MHz cooled-shaft antenna[in vivo 50 W short-axis:(2.34±0.49) cm;long-axis (3.43±0.96) cm] in both in vitro and in vivo porcine livers (P＜0.05).At the same setting,the short-and long-axis diameters in the in vitro liver increased compared to those in vivo liver,and in 70 W power setting,the peak temperature of every surveying spot in the in vitro liver was significantly higher than that in the in vivo liver (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 both in vitro and in vivo livers.