Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal upright view of the chest was obtained portably . Low lung volumes result in bronchovascular crowding . Increased perihilar opacity with pulmonary vascular engorgement in the setting of cardiac enlargement is likely due to mild congestive heart failure . There is no substantial pleural effusion . No pneumothorax . Increased opacity at the left lung base may represent asymmetric edema , but supervening infection can not be excluded . Degenerative change at the acromioclavicular joint on the left is noted with joint space narrowing .
    OUTPUT:
    
Findings compatible with mild congestive heart failure . Recommend followup after treatment to evaluate for underlying infection .