Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 00 :31 is submitted .
    OUTPUT:
    
The right subclavian central line is unchanged position . Overall cardiac and mediastinal contours are stable . A few streaky linear opacities at both bases most likely reflect subsegmental atelectasis . No focal airspace consolidation is seen to suggest pneumonia . A curvilinear line in the left upper lung is felt to be related to clothing or sheets as it does appear matched pulmonary markings extend beyond the line making pneumothorax unlikely . Followup imaging , however , would be advised . No evidence of pulmonary edema . No large effusions .