Conclusion: Middle field MRI combining with SCT scan could not only exactly display early ANFH, but show staging, it might be a reliable methods for the study of early ANFH.
结论：中场MR结合螺旋CT扫描既可发现早期病变，又可进行分期，是研究早期ANFH的可靠手段。
The middle-field ISAR imaging by mending curved phase front is as same as the far-field imaging, but can reduce the requirement of measurement distance greatly, with great engineering meanings.
在中场区通过对相位弯曲补偿进行微波成像与远场成像效果相当，且能大大降低对测试距离的要求，所以具有很强的工程应用价值。
The middle-field ISAR imaging by mending curved phase front is as same as the far-field imaging, but can reduce the requirement of measurement distance greatly, with great engineering meanings.
在中场区通过对相位弯曲补偿进行微波成像与远场成像效果相当，且能大大降低对测试距离的要求，所以具有很强的工程应用价值。
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