Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , lung volumes are slightly lower . Borderline size of cardiac silhouette is unchanged . Mediastinal and hilar borders are stable . There are no focal consolidations to suggest pneumonia . There is no pulmonary edema , pleural effusion , or pneumothorax .
    OUTPUT:
    
Mild decrease in lung volumes , no evidence of pneumonia or pulmonary edema .