Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval replacement of a right thoracostomy tube , with marked improvement of a right pleural effusion . A right apical opacity remains . The heart size is top normal . The left lung remains clear . A left - sided PICC terminates at the lower SVC . There is no pneumothorax .
    OUTPUT:
    
Markedly decreased size of a right pleural effusion following placement of a right thoracostomy tube . Persistent right apical opacity . No pneumothorax .