Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a left - sided dialysis catheter extending to the region of the cavoatrial junction . Allowing for differences in positioning , the cardiomediastinal silhouette is probably unchanged . There is background hyperinflation . On the current exam , the upper zone vessels appear slightly prominent bilaterally . There is new atelectasis at the left lung base and minimal atelectasis at the right lung base . No frank consolidation or gross effusion is identified . Minimal blunting of left costophrenic angle is likely present .
    OUTPUT:
    
Mild prominence of the upper zone vessels , without overt CHF . Minimal atelectasis at the left base . No definite focal infiltrate and no frank consolidation identified .