Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A PICC line has been removed . The cardiac , mediastinal and hilar contours appear unchanged . The lung volumes are low . There is no pleural effusion or pneumothorax . There is a patchy vague opacity projecting over the left mid lung , which is difficult to delineate owing to overlapping structures including bones and EKG leads .
    OUTPUT:
    
Vague left mid lung opacity , possibly infectious . For confirmation and to assess further , acquisition of short - term follow - up chest radiographs , preferably with standard PA and lateral technique , is suggested when feasible .