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A thermal technique for local ultrasound intensity measurement: part 1. Sensor concept and prototype calibration

机译：用于局部超声强度测量的热技术：第1部分。传感器概念和原型校准

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摘要

Acoustic output measurements on medical ultrasound equipment are essential to ensure the quality of diagnosis and therapy and to preserve the safety of the patient. The local temporal-average ultrasound intensity is an important output parameter as it is related to local heat production in the body. Excessive intensities may be potentially harmful in the case of diagnostic ultrasound. On the other hand, very high local intensities are needed in therapeutic applications of ultrasound, for instance for the ablation of tumors. A technique for local ultrasound intensity measurements is described in this paper. In contrast to the common methods using hydrophones, this method is based on the transformation of the ultrasound energy into heat inside an acoustic absorber and the measurement of the resulting temperature increase. The sensor concept is described and a characterization of three manufactured prototypes is given. An accompanying paper describes the application of this measurement technique to the output characterization of a typical diagnostic ultrasound machine.
机译：医用超声设备上的声音输出测量对于确保诊断和治疗的质量以及维护患者的安全至关重要。局部时间平均超声强度是重要的输出参数，因为它与体内局部热量产生有关。在诊断超声的情况下，强度过大可能有害。另一方面，在超声的治疗应用中需要非常高的局部强度，例如用于消融肿瘤。本文介绍了一种用于局部超声强度测量的技术。与使用水听器的常规方法相比，该方法基于超声能量在吸声器内部转化为热量并测量温度升高的结果。描述了传感器的概念，并给出了三​​个制造原型的特征。随附的论文描述了该测量技术在典型诊断超声机的输出表征中的应用。

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