Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph was provided . Lung volumes are low . Streaky retrocardiac and right lower lobe opacities are likely atelectasis . There is no focal consolidation , pleural effusion or pneumothorax . Cardiomediastinal silhouette is unchanged . Clips and spinal hardware are incompletely visualized in the lumbar spine .
    OUTPUT:
    
Low lung volumes and atelectasis , otherwise no acute process .