Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to radiograph dated ___ . PA and lateral chest radiographs were obtained . Previously suspected small right pneumothorax along the right costophrenic angle has resolved , or may have been artifactual on the prior study . There is no new pneumothorax identified . Lungs are clear bilaterally with no focal consolidation . Cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion . Osseous structures are without an acute abnormality .
    OUTPUT:
    
Resolution of prior small right pneumothorax . No acute intrathoracic abnormality is detected .