Objective To study the diagnostic value of lucency shadow in pulmonary nodules.
目的探讨肺结节内透亮影对结节定性的价值。
Objective: to study a new catheter method to measure blood flow of the pulmonary circuit.
目的：研究一种新的导管法测定肺循环血流量。
Objective: to study a new catheter method to measure blood flow of the pulmonary circuit.
目的：研究一种新的导管法测定肺循环血流量。
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