Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi-upright portable view of the chest was provided . Evaluation is limited given the large body habitus and underpenetrated technique . Allowing for this , the right lung appears clear . The left lung base can not be assessed . The left upper lung appears well aerated . The heart size appears enlarged , though this could be related to technique . Mediastinal contour is normal . Bony structures appear intact .
    OUTPUT:
    
Left lung base poorly assessed . Possible cardiomegaly . No definite signs of pneumonia in the right lung or left upper lung .