Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Compared to prior , there is improved left basilar aeration compared to prior . Retrocardiac air - fluid level is suggestive of a hiatal hernia unchanged from priors . Posterior costophrenic angles are not well seen potentially due to effusions . Superiorly , the lungs are clear . Cardiac enlargement stable . No acute osseous abnormalities detected . Left PICC is seen with tip in the mid SVC .
    OUTPUT:
    
Probable small bilateral effusions without acute cardiopulmonary process .