To establish a porcine model of acute subsegmental pulmonary embolism which is suitable to study imaging diagnosis and to evaluate the technique feasibility and stability; 2.

运用介入栓塞技术建立一种能用于影像学诊断的猪急性亚段肺动脉栓塞模型，并评价其技术上的可行性和准确性；2。

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To establish a porcine model of acute subsegmental pulmonary embolism which is suitable to study imaging diagnosis and to evaluate the technique feasibility and stability; 2.

运用介入栓塞技术建立一种能用于影像学诊断的猪急性亚段肺动脉栓塞模型，并评价其技术上的可行性和准确性；2。

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