That mixing density on CT appear early is sign of persistent hemorrhage.
早期CT呈混杂密度时往往是出血在继续的征象。
Objective:To evaluate the high resolution CT(HRCT) findings of vacuole sign in solitary pulmonary nodule, and its value in the early diagnosis of lung cancer.
目的：探讨肺部孤立结节内空泡征的HRCT表现及其对诊断早期肺癌的价值。
Conclusion Halosign or air crescent sign, the specific manifestation on CT images, is of clinical significance in the early diagnosis of invasive pulmonary aspergillosis.
结论晕征、空气半月征是侵袭型肺曲霉菌病的CT特征性表现，结合原发病史，对侵袭型肺曲霉菌病诊断或早期提示性具有重要意义。
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