Ground glass opacity(GGO) shadows were found in 22 cases,Including bilateral multi-foci in 7 cases and bilateral diffusive foci in 15 cases.

• 仅表现为毛玻璃影者4例,伴有小叶间隔增厚10例,伴有实变影者7例,伴有多发小结节影者8例,伴有少量胸腔积液者4例。