Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are relatively low lung volumes . At the left lung base , there is a subtle 1 - cm rounded opacity which may relate to overlying structures ; however , underlying pulmonary nodule is not excluded . The lungs are clear elsewhere . No pleural effusion or pneumothorax is seen . Cardiomediastinal silhouettes are unremarkable .
    OUTPUT:
    
Questionable 1 - cm nodular opacity at the left lung base in this patient with low lung volumes . Recommend repeat with deep inspiration or nonurgent chest CT for further evaluation .