Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A supine portable chest radiograph is oblique such that the heart obscures the right medial lung field . There appears to be improved clarity at the right lung base compared to a film from much earlier the same date , which was semi-upright . There is still some partial obscuration of the left hemidiaphragm . This consolidation could be either atelectasis or pneumonia , though the former appears more likely . Large cardiac silhouette is unchanged and positioning of supporting lines and tubes including endotracheal tube , right IJ central venous catheter and a right - sided midline are unchanged .
    OUTPUT:
    
Slight improved aeration at right lung base ( which , however , is less well visualized than on the study from earlier the same date ) and persistent hazy opacity on the left , which could be related to either pneumonia or atelectasis .