Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . No focal consolidations concerning for pneumonia are identified . Note is made of a trace left apical pneumothorax overall unchanged compared to the prior exam . There is no pleural effusion . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Unchanged trace left apical pneumothorax . No focal consolidations concerning for pneumonia are identified .