After built the material's defect model in theory, combined the attenuation image and damage mechanics of acoustic, we can get the material's invalidation model.
从理论上建立材料的缺陷模型，并结合声衰减分布图与超声损伤力学原理，就能获得材料的失效模型。
Result: 50 cystic renal cell carcinoma patients confirmed by pathology after operations have certain features in the performances of two-dimensional acoustic image and color Doppler ultrasonic.
结果：50例手术后经病理证实的囊性肾癌患者其二维声像图表现及彩色多普勒表现具有一定的特征。
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