Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . Left - sided subclavian line terminates in the mid SVC . Since prior study from earlier today , the degree of pulmonary edema has improved . Cardiomediastinal and hilar contours are normal . There are no pleural effusions . Focal stenosis of the upper trachea has been previously evaluated on chest CT from ___ , and does not appear different compared to the scout images then . There is no pneumothorax .
    OUTPUT:
    
Subclavian line in the mid SVC . No pneumothorax or mediastinal widening .