Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . No focal consolidation or pleural effusion is seen . There is no large pneumothorax , although it is difficult to exclude a small left apical pneumothorax ; consider inspiratory and expiratory views . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No large pneumothorax seen ; difficult to exclude small left apical pneumothorax . Consider inspiratory and expiratory views of the chest .