新生儿肺重量约为成人的1/20,肺内支气管分支和肺泡数量约为成人的10%,肺泡直径约为成人的4%。气道管径小、阻力高、肺毛细血管丰富及肺泡弹力差构成新生儿肺结构功能特点—“肺储备功能”明显不足。因此,当发生肺部疾患时,新生儿肺顺应性较差。诊断和治疗不当极易导致患儿死亡[1]。肺部影像检查可为临床医师的诊断治 The neonatal lung weight is about 1/20 of that in adults, the number of bronchial branches and alveoli in the lung is about 10% of that in adults and the diameter of the alveoli is about 4% of that in adults. Small airway diameter, high resistance, rich in pulmonary capillaries and poor alveolar elasticity constitute the structural features of neonatal lung function - “lung reserve function ” significantly less. Therefore, neonatal lung compliance is poor when pulmonary conditions occur. Improper diagnosis and treatment can easily lead to death in children [1]. Pulmonary imaging can be clinician’s diagnosis and treatment