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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Monitoring the Setting of Calcium Sulfate Bone-Graft Substitute Using Ultrasonic Backscattering
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Monitoring the Setting of Calcium Sulfate Bone-Graft Substitute Using Ultrasonic Backscattering

机译：超声反向散射监测硫酸钙骨接枝替代物的设置

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摘要

We report a method to monitor the setting process of bone-graft substitutes (calcium sulfate) using ultrasonic backscattering techniques. Analyzing the backscattered fields using a pulse-echo technique, we show that it is possible to dynamically describe the acoustic properties of the material which are linked to its setting state. Several experiments were performed to control the setting process of calcium sulfate using a 3.5-MHz transducer. The variation of the apparent integrated backscatter (AIB) with time during the setting process is analyzed and compared with measurements of the speed of sound (SOS) and temperature of the sample. The correlation of SOS and AIB allows us to clearly identify two different states of the samples, liquid and solid, in addition to the transition period. Results show that using backscattering analysis, the setting state of the material can be estimated with a threshold of 15 dB. This ultrasonic technique is indeed the first step to develop real-time monitoring systems for time-varying complex media as those present in bone regeneration for dental implantology applications.
机译：我们报告了一种使用超声反向散射技术监测骨移植替代物（硫酸钙）的设置过程的方法。使用脉冲回波技术分析反向散射场，我们表明可以动态描述与设置状态相关的材料的声学特性。使用3.5-MHz传感器进行了一些实验，以控制硫酸钙的凝固过程。分析设置过程中视在积分背向散射（AIB）随时间的变化，并将其与声音速度（SOS）和样品温度的测量值进行比较。 SOS和AIB的相关性使我们能够清楚地识别样品的两种不同状态，即过渡期和液态。结果表明，使用反向散射分析，可以用15 dB的阈值估计材料的凝固状态。实际上，这种超声技术是开发实时监测系统的第一步，该系统可用于随时间变化的复杂介质，如用于牙种植学应用的骨再生中存在的介质。

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