Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . There is improved but persistent opacity in the right upper lung , consistent with known pneumonia . There is no new focal consolidation . The left lung is well aerated . There is no pleural effusion .
    OUTPUT:
    
Improved but persistent residual pneumonia in the right upper lobe . No other acute cardiopulmonary process .