Objective: To evaluate the value of MR signal intensity in pleural diseases.
目的：评价磁共振信号强度在胸膜疾病中的诊断价值。
Then it introduces receiving signal as reliability evaluate or weighted coefficient of hard-decision, consequently presents weighted bit-flipping decoding algorithm based on check sum.
在此基础上引入接收信号作为可靠性评估，使评估值作为硬判决的加权系数，从而提出基于校验和的加权位翻转解码算法。
Conclusion: MSAF is a signal that the foetus is in danger. It is an important index to evaluate whether foetus is in safety or in danger.
结论：羊水粪染是胎儿在危险环境中的信号，是评估胎儿安危的一个重要指标。
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