Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Port - A - Cath unchanged residing in the right chest wall with catheter tip extending to the cavoatrial junction . The lung volumes are markedly low which limits the evaluation . There is subtle bibasilar opacity which could represent pneumonia though given the low lung volumes , bronchovascular crowding atelectasis may also contribute to this appearance . A tiny right effusion is likely present . No pneumothorax . Overall cardiomediastinal silhouette is stable . Bony structures are intact .
    OUTPUT:
    
Possible vague opacities in the lower lungs could represent pneumonia . Probable tiny right effusion . Given the low lung volumes evaluation is limited . Consider repeat study with improved inspiratory effort .