Coupling agents in therapeutic ultrasound: Acoustic and thermal behavior
Coupling agents in therapeutic ultrasound: Acoustic and thermal behavior
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DOI：
10.1016/s0003-9993(03)00293-4
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发表时间：
2004-01-01
影响因子：
4.3
通讯作者：
Bacanelli, F
中科院分区：
文献类型：
--
作者：
Casarotto, RA;Adamowski, JC;Bacanelli, F
医用超声中的偶联剂：声学和热行为。Arch Phys Med Rehabil 2004；85：162-5.目的：比较4种耦合介质的透过率数据和热行为。设计：实验。地点：巴西研究生康复项目。特性：4种耦合介质：凝胶、矿物油、白色凡士林和脱气水。干预：不适用。主要观察指标：用密度测量单元测量凝胶、矿物油、白色凡士林和脱气水的透过率、衰减、反射系数和声阻抗。结果：透射率数据显示，水和凝胶的透射率最高，反射最小，衰减系数和声阻抗接近皮肤。热数据显示，在与白色凡士林和矿物油的辐射过程中，换能器中的热量最高，这是由于各介质的导热特性所致。结论：所获得的透过率数据表明，水和凝胶具有最好的声学特性。在超声治疗中，使用薄层偶联剂的直接接触技术可以使用任何产品，因为当薄层像实验中使用的那样薄时，衰减系数的影响不会起到显著作用。
Casarotto RA, Adamowski JC, Fallopa F, Bacanelli F. Coupling agents in therapeutic ultrasound: acoustic and thermal behavior. Arch Phys Med Rehabil 2004;85:162-5.Objective: To compare transmissivity data and thermal behavior of 4 coupling media.Design: Experimental.Setting: Postgraduate rehabilitation program in Brazil.Specimens: Four coupling media: gel, mineral oil, white petrolatum, and degassed water.Interventions: Not applicable.Main Outcome Measures: The transmission, attenuation, reflection coefficient, and acoustic impedance of gel, mineral oil, white petrolatum, and degassed water were measured with a density measurement cell. The temperature variation in the therapeutic ultrasound transducer was measured with a thermocouple.Results: The transmissivity data showed that the water and gel presented the highest transmission coefficient, the lowest reflection, and an attenuation coefficient and acoustic impedance close to that of the skin. The thermal data revealed the highest heating in the transducer during the insonation with white petrolatum and mineral oil, resulting from the thermal conductivity features of each medium.Conclusions: Transmissivity data obtained showed that water and-gel present the best acoustic features. In ultrasound therapy, with the direct contact technique using thin layers of coupling agents, any product may be used, because the effect of the attenuation coefficient does not play a significant role when layers are as thin as those used in this experiment.