Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual - lumen central venous catheter terminates in the mid-to - lower superior vena cava . The aortic arch is partly calcified . Otherwise , the cardiac , mediastinal and hilar contours appear within normal limits noting that the heart is at the upper limits of normal size . Mild blunting of the left costophrenic angle suggests a very small pleural effusion on the left side . Hyperinflation is suggested by flattening of the hemidiaphragms and an expanded anteroposterior dimension of the chest . There is mild background coarsening of lung markings , namely slight interstitial prominence with peribronchial cuffing , more prominent in the right lower than left lung , although without confluent focal opacification . Mild degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
Mild interstitial prominence , which may reflect airway inflammation or possibly slight fluid overload but does not necessarily represent an acute finding . If pulmonary symptoms were to persist , however , then followup radiographs could be considered . A trace pleural effusion is suspected on the left .