CAJ | 학술논문

目的比较915 MHz与2450 MHz微波在离体猪肝消融实验中温度曲线与消融范围的异同点.方法分别应用915 MHz与2450 MHz微波进行离体猪肝实验,实验分为4组:50 W,60 W,70 W与80 W,作用时间均为600 s,共消融56个标本;消融过程于电极旁开5 mm、10 mm、15 mm、20 mm与25mm处测温,共得到280点温度曲线.结果 915 MHz与2450 MHz微波的温升曲线均以天线为中心在三维空间上呈逐渐衰减的规律.并且随着微波输出能量的增加,温度曲线的最高温度有逐渐增加的趋势,同时随着距离天线越来越远,温度曲线的最高温度有逐渐下降的趋势.除了旁开5 mm位点,915 MHz微波的最高温度均高于2450 MHz微波(P＜0.05).915 MHz微波消融区的横径与长径均＞2450 MHz微波(P＜0.05).结论 915 MHz微波在离体猪肝标本中可形成更高且稳定的温度曲线及更大的消融范围.
목적 비교915 MHz여2450 MHz미파재리체저간소융실험중온도곡선여소융범위적이동점.방법 분별응용915 MHz여2450 MHz미파진행리체저간실험,실험분위4조:50 W,60 W,70 W여80 W,작용시간균위600 s,공소융56개표본;소융과정우전겁방개5 mm、10 mm、15 mm、20 mm여25mm처측온,공득도280점온도곡선.결과 915 MHz여2450 MHz미파적온승곡선균이천선위중심재삼유공간상정축점쇠감적규률.병차수착미파수출능량적증가,온도곡선적최고온도유축점증가적추세,동시수착거리천선월래월원,온도곡선적최고온도유축점하강적추세.제료방개5 mm위점,915 MHz미파적최고온도균고우2450 MHz미파(P＜0.05).915 MHz미파소융구적횡경여장경균＞2450 MHz미파(P＜0.05).결론 915 MHz미파재리체저간표본중가형성경고차은정적온도곡선급경대적소융범위.
Objective To compare temperature curve and ablation zone between 915 MHz and 2450 MHz cooled shaft microwave antenna in ex vivo porcine livers.Methods The 915 MHz 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 80W and the setting time was 600s.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 output power was increased,and except for 5 mm away from the antenna,the peak temperatures for the 915 MHz cooledshaft 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).Conclusions The 915 MHz cooledshaft antenna can yield a significantly larger ablation zone and achieve higher temperature in ablation zone than 2450 MHz cooled-shaft antenna in ex vivo porcine livers.