观察名为Haifu系统JCQ-B的新型体外高强度聚焦超声换能器的特点，并将其与标准的Haifu系统JC换能器在乳腺消融的安全性和疗效方面进行比较。我们以半球形状的牛肝配以猪皮和猪肋骨作为体外声学模型，并使用雌山羊的乳房作为体内声学模型。以上述换能器中的JCQ-B或JC换能器对体外和体内模型进行消融。观察并比较生物聚焦区域（BFR）的形态、凝固性坏死体积以及温度升高。JCQ-B换能器的BFR形态在体内和体外都是圆形的，长宽比接近1。在相同的声耦合参数下（超声功率、超声时间和组织深度），JCQ-B换能器引起的凝固坏死体积较JC换能器在体内和体外都要大。体外实验中，JCQ-B换能器近程和远程声学路径上的温度升高明显低于JC换能器。在体内实验中，经过高超声能量照射后，JCQ-B换能器消融后无并发症，而JC换能器消融后观察到小面积皮肤损伤。JCQ-B换能器通过优化BFR形态和消融效率改善了治疗的安全性和疗效，可应用于乳腺肿瘤的治疗。

To observe the characteristics of a new extracorporeal high intensity focused ultrasound transducer, titled Haifu system JCQ-B, and to compare its safety and efficacy for breast ablation with the standard Haifu system JC transducer.Ox liver with pig skin and pork ribs were prepared in a semi-sphere shape, served as in vitro acoustic model. The udders of female goats were used as in vivo acoustic model. Both in vitro and in vivo models were ablated by either JCQ-B or JC transducer. The morphology of biological focal region (BFR), the coagulative necrosis volume, and the temperature increase were observed and compared.The BFR morphology of JCQ-B transducer was circular both in vitro and in vivo, with a length-width ratio close to one. Under the same sonication parameters (sonication power, time and depth in tissue), coagulation necrosis volume caused by JCQ-B transducer was larger than that caused by JC transducer both in vitro and in vivo. The increase in temperature in the near and far acoustic pathways with JCQ-B transducer was significantly lower than that of JC transducer in vitro. After receiving high sonication energy during in vivo experimentation, there were no complications observed after the ablation of JCQ-B transducer, while small skin damage was observed after the ablation of JC transducer.The JCQ-B transducer improved the safety and efficacy of treatment by optimizing BFR morphology and ablation efficiency, which could be applied in the treatment of breast tumor.