1　病因脑室周围白质软化 (ＰＶＬ)主要是一种缺血性损伤 ,偶有报道感染和细胞因子的参与亦能引起。在早产儿的患病率为 8%～ 2 6 %。在应用呼吸机的早产儿中 ,患病率可高达 38%～ 6 0 %。应用胶体注射放射显影技术 ,可清晰显示早产儿的脑室周围系大脑前、中、后动脉的终末供血 1 cause periventricular leukomalacia (PVL) is mainly an ischemic injury, occasional reports of infection and cytokine involvement can also cause. Prevalence in premature children was 8% to 26%. In preterm infants with ventilators, the prevalence can be as high as 38% to 60%. Application of colloid injection radiography, can clearly show the preterm children around the periventricular Department of the brain before, during and after the artery of the terminal blood supply