Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP view of the chest . There is mild right basilar opacity partially obscuring the costophrenic angle . Elsewhere , the lungs are clear . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications are noted at the arch . No definite acute osseous abnormality detected .
    OUTPUT:
    
Hazy right basilar opacity partially obscuring the right costophrenic angle suggesting a small effusion . Otherwise , no acute cardiopulmonary process .