Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been essential resolution of previously seen pulmonary opacities with possible minimal residual remaining in the right upper lung . The left lung is clear . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Essential resolution of previously seen pulmonary opacities with possible minimal residual remaining in the right upper lung .