Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval resolution of the previously identified small right apical pneumothorax . Redemonstrated is a coiled pigtail catheter overlying the right upper lung field . There is no evidence of focal consolidation , pleural effusion , or pulmonary edema . The cardiomediastinal silhouette is stable . No bony abnormality is detected .
    OUTPUT:
    
Interval resolution of a right apical pneumothorax . No evidence of acute cardiopulmonary process .