Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal semi-upright view of the chest was obtained portably . Low lung volumes result in bronchovascular crowding . Mild pulmonary edema is exaggerated by low lung volumes and mild cardiomegaly is increased from the prior study . There is likely a small left pleural effusion . No pneumothorax .
    OUTPUT:
    
Mild congestive heart failure .