近期的上呼吸道感染史是脑动脉病变和FCA的特殊预测因素，这表明感染在这些损伤的发生机制中可能扮演比较重要的角色。
Recent upper respiratory infection predicted cerebral arteriopathy and FCA in particular, suggesting a possible role for infection in the pathogenesis of these lesions.
目的探讨放射性肺损伤的影像学表现以及病理发生机制。
Objective To investigate the imaging features of radiation-induced pulmonary injury and the pathology mechanism.
缺血性脑损伤的发生机制目前尚未明确，临床缺乏有效的治疗手段。
The mechanism of ischemic brain injury has not been elucidated thoroughly now, and there is no effective therapy in clinic.
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