Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal view of the chest was obtained portably . Lung volumes are slightly low , resulting in bronchovascular crowding . There is no focal consolidation , pleural effusion or pneumothorax . Mild cardiomegaly is unchanged . Mediastinal silhouette and hilar contours are unchanged allowing for differences in lung volumes .
    OUTPUT:
    
No pneumonia , edema , or effusion .