Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal images of the chest . A tracheostomy is noted . There are low lung volumes . Mild pulmonary edema is again seen , similar to prior exam . Opacities again noted in the right lung base , unchanged to prior exam . Right pleural effusion is similar prior exam . There may be a new small left pleural effusion . No pneumothorax is seen . There is moderately severe cadiomegaly , unchanged from prior exam .
    OUTPUT:
    
1 . Mild pulmonary edema , similar to prior exam . 2 . Unchanged right lung base opacity . 3 . Stable right pleural effusion . Probable new small left pleural effusion .