Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal upright view of the chest was obtained . Apparent enlargement of the cardiac silhouette and widening of the mediastinum is likely related to the portable technique and the patient 's rotated position . Redemonstrated are linear areas of scarring , most prominent at the base of the right lung . There is no focal consolidation . The lungs are symmetrically expanded bilaterally . Blunting of the right costophrenic angle is relatively unchanged and may reflect a small chronic right pleural effusion or pleural thickening in this region . There is no pneumothorax .
    OUTPUT:
    
Allowing for differences in technique and position , there is no significant change compared to the prior study .