Incidental discovery of solitary pulmonary nodules (SPN) is very frequent during CT of the chest.Many characteristic diagnostic methods of SPN no longer apply to the small SPN.

• 随着肺部小孤立性肺结节检出率的增加,适用于肺部孤立性肺结节的特征诊断方法对于小肺部孤立性肺结节都不再适用。