Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine view of the chest . There is a left central venous catheter with tip in the upper SVC . There is persistent elevation of the right hemidiaphragm which is unchanged . There is no large confluent consolidation . Cardiomediastinal silhouette is unchanged . Atherosclerotic calcifications seen at the aortic arch .
    OUTPUT:
    
Left central venous catheter with tip in the upper SVC . No evidence of pneumothorax based on this supine film .