【摘要】 目的 研究胸部肿瘤γ-刀治疗后放射性肺损伤的CT表现。方法 收集96例γ-刀治疗后放射性肺损伤的CT影像资料,对肺部CT征象进行分析。结果γ-刀治疗后放射性肺损伤的CT表现分4种类型:γ-刀治疗后1～6个月,6例CT片上呈毛玻璃样影;28例呈多发的边界不清的补丁状实变影;γ-刀治疗后7～12个月,48例呈靶区中心致密实变影,其中35例实变影中伴随牵拉性支气管充气征和肺体积收缩;γ-刀治疗12个月后,37例呈纤维化改变,以靶区为中心放射状分布。结论 γ-刀治疗与传统放射治疗的放射性肺损伤CT表现相似,但其分布范围不同,这是由于γ-刀剂量分布和传统放射治疗不同而引起。更多还原

【Abstract】 Objective To evaluate computed tomography(CT) manifestations of lung injury after gamma knife radiotherapy for chest tumors.Methods CT images of 96 cases with lung injury after gamma knife radiotherapy were analyzed retrospectively.Results The lung injuries after gamma knife radiotherapy were of four patterns on CT images.Within 1～6 months,ground-glass opacities in 6 cases.Multiple patchy consolidations with obscure boundary in 28 were observed.Within 7～12 months,dense consolidations developed in 48 in the center of the planned target volume,of which traction bronchiectasis and volume loss were observed in 35.After 12 months the radial fibrosis was observed in 37,the lesions focused on the target volume.Conclusion CT manifestations of lung injury after gamma knife radiotherapy are similar to that of conventional radiation therapy.However,the changes of the extent and distribution of lesions should be interpreted by considering the shape of dose distribution peculiar to gamma knife.更多还原