Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided Port - A - Cath terminates in the high right atrium versus cavoatrial junction . There are low lung volumes due to a sub - optimal inspiratory effort ; accounting for changes due to this , the cardiomediastinal silhouettes are stable and within normal limits . Calcifications are noted in the aortic knob . The bilateral hila are unremarkable . Subtle opacities at the bilateral lung bases likely relates to bibasilar atelectasis . A retrocardiac opacity is compatible with known large hiatus hernia . The lungs are otherwise clear . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion . The osseous structures are again noted to be diffusely sclerotic , compatible with known diffuse metastatic disease .
    OUTPUT:
    
1 . Low lung volumes . No acute cardiopulmonary process . 2 . Right Port - A - Cath terminating in the high right atrium versus cavoatrial junction . 3 . Diffuse osseous sclerotic metastases . 4 . Large hiatus hernia .