Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ at 12 :39 and allowing for technical differences , the overall appearance is relatively similar . The interstitial markings at the left base and in the right cardiophrenic region may be slightly coarser . No frank consolidation , effusion , or pneumothorax is detected . The heart is not enlarged and could be slightly smaller . The enlargement of the main pulmonary artery is again noted , in keeping with findings on recent CT . Again noted is left subclavian PICC line , similar in a position , with tip overlying the mid / distal SVC .
    OUTPUT:
    
Overall similar appearance to chest x-ray from 1 day earlier . Interstitial markings in the right cardiophrenic region and left base may be slightly coarser . Given the time course , this could reflect asymmetric distribution of early CHF . An interstitial infiltrate is considered less likely but could also account for this appearance . No frank consolidation or effusion . Minimal left greater right upper zone redistribution is unchanged .