放射性肺损伤的CT分析

目的：分析放射性肺损伤的CT表现，评价其CT诊断价值。材料与方法：收集资料完整的放射性肺损伤病人160例，对其CT表现回顾性分析与平片表现进行比较。结果：160例首诊表现为放射性肺炎者66例，过渡期者40例，瘢痕期者54例。CT表现：急性放射性肺炎期表现为照射野内出现均匀的密度稍高影或仅表现为轻度的肺野透光度减低，过渡期表现为照射野内出现均匀的密度稍高影或仅表现为轻度的肺野透光度减低，过渡期表现为照射野内索条影夹杂小斑片影，瘢痕期表现为照射野内浓密的索条影及斑片影，范围缩小。CT显示急性放射性损伤平均较平片早1-2周，且对于隐秘部位病灶显示、各期区分、肺损伤与原发灶（或复发）区分CT明显较平片更容易、精确。结论：CT能明确显示放射性肺损伤的影像学表现及大体分明，具有较平片更高的敏感性，对临床有较好的指导与鉴别作用。

CT Analysis of Radiation-induced Pulmonary Injury

Purpose：To Analysis the CT representations of radiation-induced pulmonary injury，evaluate its CT diagnosis value. Material and Method: The data of 160 patients with radiation induced pulmonary injury were collected, and reviewed to their CT findings, and compared CT features with X-ray's. Result: In 160 patients of first examination, and compared CT features with X-ray's. Result: In 160 patients of first examination, 66 patients represent acute radiation-induced pneumonia, 40 cases are in transition, stage, and 54 cases are in fibrosis stage. CT findings: radiation -induced pneumonia stage represents symmetrical high-density image or only pass-through grade light reduce in irradiation area, transition stage represents strip lard small patch image in irradiation area, and scar stage represents thick strip and patch image in the area, and bound shrink. The appearing time of acute radiation-induced pneumonia in CT is earlier than in plain film. And CT is even more easy and precision than plain film to show the focus in secrete part, distinguish apiece stage and differentiate pulmonary injury from original lesion(or recrudescence).Conclusion: CT can definitely show the radiological features and presumedly by-stages of radiation induced pulmonary injury, and has much higher sensitivity than plain film, and has preferable guidance and differentiation function in clinic.