Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right apical pneumothorax is stable since the most recent CXR today at 1 :07 PM , but has improved since the CXR from 9 :42 AM today . No evidence of tension . Right - sided chest tube is unchanged in position . Slight opacification of the left lung base , likely due to atelectasis . No pleural effusions . Cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Right apical pneumothorax has remained stable since the most recent CXR performed 2 .5 hours ago ( ___ at 1 :07 PM ) .