Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Partially imaged fusion hardware is seen in the upper abdomen . A loculated left pleural effusion is unchanged . There is likely compressive lower lobe atelectasis on the left . Since the prior exam , there is increased conspicuity of the interstitial markings which could reflect a component of mild pulmonary edema .
    OUTPUT:
    
Apparent development of mild pulmonary edema .