Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . There are bibasilar moderate right greater than left pleural effusions not definitely changed given differences in positioning and technique compared to prior . Superiorly the lungs are clear . Cardiomediastinal silhouette is difficult to assess given effusions . No acute osseous abnormality detected .
    OUTPUT:
    
Essentially unchanged moderate bilateral effusions without superimposed acute cardiopulmonary process .