Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable persistent elevation of the left hemidiaphragm . Mild , smooth left apical pleural thickening was not visualized on the previous exam , likely due to differences in positioning . There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is obscured by the left hemidiaphragm .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .