Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates a normal cardiomediastinal silhouette . Lung volumes are low , with bronchovascular crowding . Streaky opacity in the right base likely represents atelectasis . There is no definite focal consolidation or pneumothorax . There may be a trace left pleural effusion . Rightward curvature of the thoracic spine is again seen and grossly unchanged .
    OUTPUT:
    
1 . Low lung volumes , with right base atelectasis . 2 . Trace left pleural effusion .