77例放射性肺损伤的X线诊断分析

报告１９９２年１０月至１９９５年１０月因胸部肿瘤做放射治疗而发生放射性肺损伤的７７例，发生率为８．１％（７７／９５０）．急性放射性肺炎发生在放疗近结束时至放疗后２个月内，放射性肺纤维化于放疗后２个月开始形成，６个月时最显著。作者认为影像诊断的目的是区别放射性肺炎、肺部感染和癌性淋巴管炎、放射性肺纤维化与肿瘤复发。对放射性肺损伤的诊断，ＣＴ扫描优于胸部摄片，能更早地发现放疗后轻微的渗出病变，对判断有无肿瘤复发更有价值。

Radiologic Diagnosis of 77 Cases of Radiation Injuries of the Lung

cases of radiation injuries caused by radiotherapy in chest cancers were reported from October,1992 to October.1995.The radiation injuries of the lung occurred at a rate of 8.1%(77/950).Acute radiation pneumonitis caused by radiotherapy came about nearly by the end of and within two months after the end of radiotherapy. Chronic radiation pulmonary fibrosis started to occur after two months of radiotherapy ended, and six monthe later the pathological changes in the image were the most remarkable. The authors considered that the aim of radiologic diagnosis is to distinguish radiation pneumonitis from infectious pneumonitis,lymphangitis carcinomatosa and to distinguish radiation pulmonary fibrosis from cancer recurrence.The CT scanning is better than chest radiography for diagnosis of radiation injuries of the lung.Acute radiationpneumonitis can be detectd by CT earlier than by conventional radiograph. CT has more value in determining whether cancer relapse of not.