Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is at the upper limits of normal or slightly enlarged . The aorta is minimally unfolded . Hilar an mediastinal contours are otherwise within normal limits . No CHF , focal infiltrate or effusion is identified . Minimal atelectasis in the right cardiophrenic region , left lung base , and minimal scarring at the left lung apex noted . There are mild degenerative changes of the thoracic spine .
    OUTPUT:
    
1 . Heart size at the upper limits of normal or slightly enlarged . 2 . No acute pulmonary process detected . 3 . Assessment of the left shoulder is limited on this exam .