Ruckhäberle E, Nekolla S G, Ganter C, Schneider K T M, Peter A, Raidt A, Kovacs L, Brockmeier S J, Schwaiger M, Oberhoffer R, Papadopulos N A
Department of Perinatal Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.
Fetal Diagn Ther. 2008;24(3):203-10. doi: 10.1159/000151339. Epub 2008 Aug 28.
To investigate the influence of several magnetic resonance imaging (MRI) sequences on amniotic fluid temperature and intrauterine sound pressure.
Temperature and sound pressure measurements during MRI (1.5 T) in pregnant ewes were done. Linear levels and third octave band spectra were compared.
No significant changes in the temperature of amniotic fluid were observed. Intrauterine summation levels reached peak levels up to 103.0 dB(A) before starting the MRI sequence and levels up to 116.0 dB(A) during a real-time sequence. Evaluating the octave band spectra, peak levels did not exceed 100.0 dB(L).
Our delimited data revealed no harm for the fetus by an increase in amniotic fluid temperature or hazards for the fetal auditory system by different MRI sequences.
研究几种磁共振成像（MRI）序列对羊水温度和宫内声压的影响。
对怀孕母羊进行1.5T MRI检查时测量温度和声压。比较了线性水平和倍频程带谱。
未观察到羊水温度有显著变化。在开始MRI序列之前，宫内总声压级达到峰值水平，最高可达103.0 dB(A)，在实时序列期间最高可达116.0 dB(A)。评估倍频程带谱时，峰值水平未超过100.0 dB(L)。
我们有限的数据表明，羊水温度升高对胎儿无害，不同的MRI序列对胎儿听觉系统也无危害。
