【摘要】 目的　探讨超声诊断仪器输出声压和声强与孕鼠宫内胚胎实际受照声压和声强间的相关性。方法　应用聚偏氟乙烯 (PVDF)压电传感器 ,对经腹彩色多普勒辐照的孕鼠进行宫内瞬态声参数及声场参数的测量。结果　 2 .5MHz、3 .5MHz、7.0MHz彩超探头在水中自由场的最大正负瞬时声压 (p +、p-)、空间峰值时间峰值声强 (Isptp)、空间峰值时间平均值声强 (Ispta)和最大声强 (Im )测值与孕鼠宫内实际测得声参数值比较差异有显著性意义。结论　实验证实孕鼠宫内胚胎实际超声辐照量 (声压、声强 )小于彩超仪器输出功率。更多还原

【Abstract】 Objective To evaluate the correlation between the sound pressure and intensity output by ultrasonic diagnostic apparatus and received by the embryo in the uterus.Methods The transient sound parameter and sound field parameter inside the uterus in pregnant rats irradiated by transabdominal color Doppler were measured with polyvinylidene fluoride (PVDF) piezoelectric sensor.Results There was a significant difference in the maximal p+(peak positive acoustic pressure),p-(peak negative acoustic pressure),Ispta(intensity spatial peak temporal peak), Ispta(intensity peak temporal average),Im(intensity maximum) measured between inside the uterus and in water free field by various kinds probes( 2.5 MHz, 3.5 MHz, 7.0 MHz).Conclusions The irradiation received by the embryo in uterus was smaller than the output of ultrasonic diagnostic apparatus.更多还原