Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal semi-upright view of the chest was obtained portably . Lung volumes are very low , resulting in bronchovascular crowding . Elevation of the right hemidiaphragm persists . The pulmonary vasculature is indistinct suggesting pulmonary vascular congestion . The heart is mildly enlarged . There may be a small left effusion . Right basilar atelectasis is unchanged . Increased opacity at the left lung base may be atelectasis or infection . There is no definite pneumothorax . The tracheostomy tube has been removed in the interim .
    OUTPUT:
    
1 . Findings consistent with congestive heart failure . 2 . Opacity at the left lung base may represent atelectasis or infection .